tests/api/C/timeout.cpp

/***********
AUTHORS:  Trevor Hansen, Dan Liew, Andrew V. Jones

BEGIN DATE: Jan, 2012

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**********************/

#include "stp/c_interface.h"
#include <gtest/gtest.h>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>

void test_timeout(bool test_with_time, uint32_t max_value, bool use_cms)
{
  srand(time(NULL)); // FIXME: We should not be introducing non-deterministic
                     // behaviour in a test case!

  for (int i = 0; i < 10; i++)
  {
    // need to create VCs for every loop, otherwise the timeouts are not used
    // correctly
    VC vc = vc_createValidityChecker();
    vc_setFlags(vc, 'm');
    if (use_cms)
    {
      vc_useCryptominisat(vc);
    }
    else
    {
      vc_useMinisat(vc);
    }

    // SMT_FILE is a macro that expands to a file path
    Expr c = vc_parseExpr(vc, SMT_FILE);

    int limit = // time is in seconds
        rand() %
        max_value; // FIXME: non-determinsitc behaviour in a test case is BAD!!!
    std::string timeout_type;
    uint32_t max_conflicts = -1;
    uint32_t max_time = -1;
    if (test_with_time)
    {
      timeout_type = "Time ";
      limit = std::max(limit, 1); // we do not want a 0 timeout
      max_time = limit;
    }
    else
    {
      timeout_type = "Conflicts";
      max_conflicts = limit;
    }
    std::cout << timeout_type << " : " << limit << " : result " << std::flush;

    // returns 3 on timeout
    int query = vc_query_with_timeout(vc, vc_falseExpr(vc), max_conflicts, max_time);
    ASSERT_TRUE(query == 3);

    std::cout << query << std::endl;

    // FIXME: Actually test something
    // ASSERT_TRUE(false && "FIXME: Actually test something");

    vc_DeleteExpr(c);
    vc_Destroy(vc);
  }
}

void test_conflicts(bool use_cms)
{
  bool is_time_timeout = false;
  uint32_t max_value = 500;
  test_timeout(is_time_timeout, max_value, use_cms);
}

#ifdef USE_CRYPTOMINISAT
TEST(timeout_conflicts_cms, one)
{
  bool use_cms = true;
  test_conflicts(use_cms);
}
#endif

TEST(timeout_conflicts_minisat, one)
{
  bool use_cms = false;
  test_conflicts(use_cms);
}

#ifdef USE_CRYPTOMINISAT
/*
 * Timeout tests only with with CMS
 */
TEST(timeout_time, one)
{
  /*
   * this test should probably test the instance without a timeout and then
   * choose a value lower than it for the next time
   */
  bool is_time_timeout = true;
  uint32_t max_value = 3; // purposefully very low to ensure we hit a timeout
  bool use_cms = true;
  test_timeout(is_time_timeout, max_value, use_cms);
}
#endif