/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:44:34,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:44:34,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:44:34,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:44:34,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:44:34,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:44:34,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:44:34,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:44:34,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:44:34,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:44:34,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:44:34,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:44:34,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:44:34,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:44:34,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:44:34,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:44:34,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:44:34,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:44:34,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:44:34,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:44:34,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:44:34,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:44:34,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:44:34,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:44:34,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:44:34,642 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:44:34,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:44:34,642 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:44:34,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:44:34,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:44:34,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:44:34,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:44:34,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:44:34,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:44:34,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:44:34,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:44:34,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:44:34,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:44:34,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:44:34,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:44:34,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:44:34,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:44:34,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:44:34,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:44:34,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:44:34,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:44:34,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:44:34,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:44:34,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:44:34,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:44:34,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:44:34,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:44:35,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:44:35,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:44:35,002 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:44:35,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound20.c [2021-05-06 03:44:35,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40261406/a5f493200bdc4054b9552078780bf65d/FLAGbcc85c9c4 [2021-05-06 03:44:35,390 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:44:35,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound20.c [2021-05-06 03:44:35,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40261406/a5f493200bdc4054b9552078780bf65d/FLAGbcc85c9c4 [2021-05-06 03:44:35,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d40261406/a5f493200bdc4054b9552078780bf65d [2021-05-06 03:44:35,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:44:35,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:44:35,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:44:35,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:44:35,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:44:35,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4274a5eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35, skipping insertion in model container [2021-05-06 03:44:35,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:44:35,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:44:35,546 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound20.c[560,573] [2021-05-06 03:44:35,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:44:35,576 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:44:35,599 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound20.c[560,573] [2021-05-06 03:44:35,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:44:35,641 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:44:35,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35 WrapperNode [2021-05-06 03:44:35,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:44:35,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:44:35,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:44:35,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:44:35,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (1/1) ... [2021-05-06 03:44:35,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:44:35,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:44:35,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:44:35,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:44:35,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:44:35,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:44:35,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:44:35,731 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:44:35,732 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:44:35,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:44:35,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:44:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:44:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:44:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:44:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:44:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:44:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:44:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:44:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:44:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:44:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:44:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:44:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:44:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:44:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:44:35,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:44:35,984 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 03:44:35,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:44:35 BoogieIcfgContainer [2021-05-06 03:44:35,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:44:35,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:44:35,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:44:35,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:44:35,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:44:35" (1/3) ... [2021-05-06 03:44:35,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1990495b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:44:35, skipping insertion in model container [2021-05-06 03:44:35,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:44:35" (2/3) ... [2021-05-06 03:44:35,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1990495b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:44:35, skipping insertion in model container [2021-05-06 03:44:35,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:44:35" (3/3) ... [2021-05-06 03:44:35,990 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound20.c [2021-05-06 03:44:36,009 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:44:36,012 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:44:36,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:44:36,064 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:44:36,065 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:44:36,065 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:44:36,065 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:44:36,065 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:44:36,065 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:44:36,065 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:44:36,065 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:44:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 03:44:36,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 03:44:36,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:44:36,093 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:44:36,093 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:44:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:44:36,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1515787587, now seen corresponding path program 1 times [2021-05-06 03:44:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:44:36,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038159976] [2021-05-06 03:44:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:44:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:44:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:44:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:44:36,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:44:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:44:36,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 03:44:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:44:36,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-06 03:44:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:44:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-06 03:44:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:44:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 03:44:36,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:44:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038159976] [2021-05-06 03:44:36,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038159976] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:44:36,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:44:36,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:44:36,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928255724] [2021-05-06 03:44:36,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:44:36,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:44:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:44:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:44:36,383 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:44:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:44:36,523 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2021-05-06 03:44:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:44:36,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 03:44:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:44:36,529 INFO L225 Difference]: With dead ends: 74 [2021-05-06 03:44:36,529 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 03:44:36,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:44:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 03:44:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 03:44:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 03:44:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-05-06 03:44:36,567 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32 [2021-05-06 03:44:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:44:36,567 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-05-06 03:44:36,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:44:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-05-06 03:44:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:44:36,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:44:36,571 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:44:36,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:44:36,571 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:44:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:44:36,572 INFO L82 PathProgramCache]: Analyzing trace with hash 182383832, now seen corresponding path program 1 times [2021-05-06 03:44:36,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:44:36,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250266822] [2021-05-06 03:44:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:44:36,599 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:44:36,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563431999] [2021-05-06 03:44:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:44:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:44:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:44:36,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:44:36,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:44:36,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:44:36,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:44:36,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:44:36,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:44:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 03:44:36,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:44:36,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250266822] [2021-05-06 03:44:36,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:44:36,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563431999] [2021-05-06 03:44:36,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563431999] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:44:36,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:44:36,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:44:36,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147230139] [2021-05-06 03:44:36,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:44:36,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:44:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:44:36,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:44:36,829 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:44:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:44:36,841 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-05-06 03:44:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:44:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:44:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:44:36,842 INFO L225 Difference]: With dead ends: 45 [2021-05-06 03:44:36,842 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 03:44:36,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:44:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 03:44:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 03:44:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 03:44:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-05-06 03:44:36,848 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 33 [2021-05-06 03:44:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:44:36,849 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-05-06 03:44:36,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:44:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-05-06 03:44:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:44:36,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:44:36,850 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:44:37,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 03:44:37,068 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:44:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:44:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash 184052128, now seen corresponding path program 1 times [2021-05-06 03:44:37,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:44:37,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121389991] [2021-05-06 03:44:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:44:37,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:44:37,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438659560] [2021-05-06 03:44:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:44:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:44:37,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:44:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:44:37,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:44:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 03:44:37,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:44:37,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121389991] [2021-05-06 03:44:37,226 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:44:37,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438659560] [2021-05-06 03:44:37,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438659560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:44:37,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:44:37,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:44:37,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402194832] [2021-05-06 03:44:37,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:44:37,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:44:37,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:44:37,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:44:37,228 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 03:44:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:44:37,280 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-05-06 03:44:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:44:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 03:44:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:44:37,282 INFO L225 Difference]: With dead ends: 57 [2021-05-06 03:44:37,282 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 03:44:37,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:44:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 03:44:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 03:44:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:44:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2021-05-06 03:44:37,288 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 33 [2021-05-06 03:44:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:44:37,289 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2021-05-06 03:44:37,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 03:44:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2021-05-06 03:44:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 03:44:37,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:44:37,290 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:44:37,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:44:37,508 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:44:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:44:37,508 INFO L82 PathProgramCache]: Analyzing trace with hash 758334593, now seen corresponding path program 1 times [2021-05-06 03:44:37,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:44:37,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400906592] [2021-05-06 03:44:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:44:37,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:44:37,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744112442] [2021-05-06 03:44:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true