/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:35:26,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:35:26,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:35:26,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:35:26,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:35:26,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:35:26,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:35:26,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:35:26,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:35:26,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:35:26,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:35:26,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:35:26,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:35:26,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:35:26,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:35:26,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:35:26,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:35:26,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:35:26,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:35:26,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:35:26,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:35:26,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:35:26,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:35:26,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:35:26,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:35:26,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:35:26,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:35:26,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:35:26,459 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 [2020-07-21 22:35:26,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:35:26,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:35:26,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:35:26,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:35:26,489 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:35:26,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:35:26,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:35:26,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:35:26,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:35:26,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:35:26,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:35:26,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:35:26,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:35:26,493 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:35:26,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:35:26,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:35:26,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:35:26,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:35:26,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:35:26,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:35:26,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:35:26,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:35:26,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:35:26,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:35:26,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:35:26,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:35:26,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:26,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:35:26,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:35:26,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:35:26,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:35:26,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:35:26,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:35:26,820 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:35:26,821 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:35:26,822 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-2.c [2020-07-21 22:35:26,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b1f302f9/5ec99cc0f5c54a238955e29ad7ae274a/FLAGc05701c38 [2020-07-21 22:35:27,408 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:35:27,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-2.c [2020-07-21 22:35:27,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b1f302f9/5ec99cc0f5c54a238955e29ad7ae274a/FLAGc05701c38 [2020-07-21 22:35:27,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b1f302f9/5ec99cc0f5c54a238955e29ad7ae274a [2020-07-21 22:35:27,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:35:27,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:35:27,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:27,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:35:27,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:35:27,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:27" (1/1) ... [2020-07-21 22:35:27,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76944b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:27, skipping insertion in model container [2020-07-21 22:35:27,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:27" (1/1) ... [2020-07-21 22:35:27,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:35:27,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:35:28,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:28,051 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:35:28,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:28,101 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:35:28,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28 WrapperNode [2020-07-21 22:35:28,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:28,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:35:28,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:35:28,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:35:28,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (1/1) ... [2020-07-21 22:35:28,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (1/1) ... [2020-07-21 22:35:28,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (1/1) ... [2020-07-21 22:35:28,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (1/1) ... [2020-07-21 22:35:28,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (1/1) ... [2020-07-21 22:35:28,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (1/1) ... [2020-07-21 22:35:28,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (1/1) ... [2020-07-21 22:35:28,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:35:28,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:35:28,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:35:28,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:35:28,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (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 [2020-07-21 22:35:28,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:35:28,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:35:28,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:35:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:35:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:35:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:35:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:35:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:35:28,733 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:35:28,734 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 22:35:28,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:28 BoogieIcfgContainer [2020-07-21 22:35:28,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:35:28,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:35:28,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:35:28,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:35:28,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:35:27" (1/3) ... [2020-07-21 22:35:28,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101afe56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:28, skipping insertion in model container [2020-07-21 22:35:28,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:28" (2/3) ... [2020-07-21 22:35:28,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101afe56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:28, skipping insertion in model container [2020-07-21 22:35:28,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:28" (3/3) ... [2020-07-21 22:35:28,748 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_14-2.c [2020-07-21 22:35:28,759 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:35:28,768 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:35:28,782 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:35:28,807 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:35:28,807 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:35:28,808 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:35:28,808 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:35:28,808 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:35:28,808 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:35:28,808 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:35:28,809 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:35:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-07-21 22:35:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:28,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:28,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:28,839 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1694527455, now seen corresponding path program 1 times [2020-07-21 22:35:28,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:28,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501362359] [2020-07-21 22:35:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:28,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:28,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:28,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:29,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:29,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501362359] [2020-07-21 22:35:29,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:29,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:29,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440524222] [2020-07-21 22:35:29,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:29,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:29,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:29,073 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-07-21 22:35:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:29,146 INFO L93 Difference]: Finished difference Result 155 states and 287 transitions. [2020-07-21 22:35:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:29,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:29,164 INFO L225 Difference]: With dead ends: 155 [2020-07-21 22:35:29,164 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 22:35:29,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 22:35:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-07-21 22:35:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 22:35:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 174 transitions. [2020-07-21 22:35:29,227 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 174 transitions. Word has length 24 [2020-07-21 22:35:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:29,228 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 174 transitions. [2020-07-21 22:35:29,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 174 transitions. [2020-07-21 22:35:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:29,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:29,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:29,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:29,444 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:29,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1694520263, now seen corresponding path program 1 times [2020-07-21 22:35:29,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:29,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487011139] [2020-07-21 22:35:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:29,555 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:29,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:29,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:29,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:29,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:29,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487011139] [2020-07-21 22:35:29,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:29,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:29,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166829352] [2020-07-21 22:35:29,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:29,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:29,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:29,598 INFO L87 Difference]: Start difference. First operand 94 states and 174 transitions. Second operand 3 states. [2020-07-21 22:35:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:29,646 INFO L93 Difference]: Finished difference Result 97 states and 177 transitions. [2020-07-21 22:35:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:29,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:29,650 INFO L225 Difference]: With dead ends: 97 [2020-07-21 22:35:29,651 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 22:35:29,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 22:35:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-07-21 22:35:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:35:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 175 transitions. [2020-07-21 22:35:29,683 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 175 transitions. Word has length 24 [2020-07-21 22:35:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:29,683 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 175 transitions. [2020-07-21 22:35:29,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 175 transitions. [2020-07-21 22:35:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:29,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:29,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:29,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:29,903 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash 106179553, now seen corresponding path program 1 times [2020-07-21 22:35:29,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:29,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071383207] [2020-07-21 22:35:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:29,973 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:29,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:29,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:29,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071383207] [2020-07-21 22:35:29,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:29,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:29,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041463246] [2020-07-21 22:35:29,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:29,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:29,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:29,998 INFO L87 Difference]: Start difference. First operand 95 states and 175 transitions. Second operand 3 states. [2020-07-21 22:35:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:30,042 INFO L93 Difference]: Finished difference Result 222 states and 412 transitions. [2020-07-21 22:35:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:30,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:30,045 INFO L225 Difference]: With dead ends: 222 [2020-07-21 22:35:30,046 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 22:35:30,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 22:35:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-07-21 22:35:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 22:35:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 237 transitions. [2020-07-21 22:35:30,079 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 237 transitions. Word has length 24 [2020-07-21 22:35:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:30,080 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 237 transitions. [2020-07-21 22:35:30,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 237 transitions. [2020-07-21 22:35:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:30,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:30,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:30,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:30,298 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash 106172361, now seen corresponding path program 1 times [2020-07-21 22:35:30,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:30,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392153024] [2020-07-21 22:35:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:30,352 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:30,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:30,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:30,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392153024] [2020-07-21 22:35:30,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:30,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:30,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711890071] [2020-07-21 22:35:30,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:30,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:30,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:30,375 INFO L87 Difference]: Start difference. First operand 130 states and 237 transitions. Second operand 3 states. [2020-07-21 22:35:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:30,393 INFO L93 Difference]: Finished difference Result 179 states and 322 transitions. [2020-07-21 22:35:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:30,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:30,395 INFO L225 Difference]: With dead ends: 179 [2020-07-21 22:35:30,395 INFO L226 Difference]: Without dead ends: 130 [2020-07-21 22:35:30,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-21 22:35:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-07-21 22:35:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-21 22:35:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 230 transitions. [2020-07-21 22:35:30,407 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 230 transitions. Word has length 24 [2020-07-21 22:35:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:30,408 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 230 transitions. [2020-07-21 22:35:30,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 230 transitions. [2020-07-21 22:35:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:30,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:30,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:30,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:30,624 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash -914888801, now seen corresponding path program 1 times [2020-07-21 22:35:30,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:30,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618959644] [2020-07-21 22:35:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:30,678 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:30,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:35:30,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:35:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:35:30,693 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:35:30,744 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:35:30,744 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:35:30,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:31,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:35:31 BoogieIcfgContainer [2020-07-21 22:35:31,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:35:31,018 INFO L168 Benchmark]: Toolchain (without parser) took 3223.04 ms. Allocated memory was 138.9 MB in the beginning and 235.4 MB in the end (delta: 96.5 MB). Free memory was 102.1 MB in the beginning and 169.7 MB in the end (delta: -67.6 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:31,019 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 22:35:31,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.11 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 90.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:31,021 INFO L168 Benchmark]: Boogie Preprocessor took 122.71 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 90.3 MB in the beginning and 180.1 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:31,022 INFO L168 Benchmark]: RCFGBuilder took 513.31 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 157.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:31,023 INFO L168 Benchmark]: TraceAbstraction took 2274.83 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 156.4 MB in the beginning and 169.7 MB in the end (delta: -13.3 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:31,028 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.11 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 90.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.71 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 90.3 MB in the beginning and 180.1 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 513.31 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 157.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2274.83 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 156.4 MB in the beginning and 169.7 MB in the end (delta: -13.3 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 217]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L6] int p1 = __VERIFIER_nondet_int(); [L7] int lk1; [L9] int p2 = __VERIFIER_nondet_int(); [L10] int lk2; [L12] int p3 = __VERIFIER_nondet_int(); [L13] int lk3; [L15] int p4 = __VERIFIER_nondet_int(); [L16] int lk4; [L18] int p5 = __VERIFIER_nondet_int(); [L19] int lk5; [L21] int p6 = __VERIFIER_nondet_int(); [L22] int lk6; [L24] int p7 = __VERIFIER_nondet_int(); [L25] int lk7; [L27] int p8 = __VERIFIER_nondet_int(); [L28] int lk8; [L30] int p9 = __VERIFIER_nondet_int(); [L31] int lk9; [L33] int p10 = __VERIFIER_nondet_int(); [L34] int lk10; [L36] int p11 = __VERIFIER_nondet_int(); [L37] int lk11; [L39] int p12 = __VERIFIER_nondet_int(); [L40] int lk12; [L42] int p13 = __VERIFIER_nondet_int(); [L43] int lk13; [L45] int p14 = __VERIFIER_nondet_int(); [L46] int lk14; [L49] int cond; VAL [p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L51] COND TRUE 1 [L52] cond = __VERIFIER_nondet_int() [L53] COND FALSE !(cond == 0) [L56] lk1 = 0 [L58] lk2 = 0 [L60] lk3 = 0 [L62] lk4 = 0 [L64] lk5 = 0 [L66] lk6 = 0 [L68] lk7 = 0 [L70] lk8 = 0 [L72] lk9 = 0 [L74] lk10 = 0 [L76] lk11 = 0 [L78] lk12 = 0 [L80] lk13 = 0 [L82] lk14 = 0 VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=0, lk4=0, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L86] COND FALSE !(p1 != 0) VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=0, lk4=0, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L90] COND FALSE !(p2 != 0) VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=0, lk4=0, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L94] COND TRUE p3 != 0 [L95] lk3 = 1 VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=0, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L98] COND TRUE p4 != 0 [L99] lk4 = 1 VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L102] COND TRUE p5 != 0 [L103] lk5 = 1 VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L106] COND TRUE p6 != 0 [L107] lk6 = 1 VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=0, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L110] COND TRUE p7 != 0 [L111] lk7 = 1 VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L114] COND FALSE !(p8 != 0) VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=0, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L118] COND TRUE p9 != 0 [L119] lk9 = 1 VAL [cond=-1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L122] COND TRUE p10 != 0 [L123] lk10 = 1 VAL [cond=-1, lk1=0, lk10=1, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L126] COND TRUE p11 != 0 [L127] lk11 = 1 VAL [cond=-1, lk1=0, lk10=1, lk11=1, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L130] COND TRUE p12 != 0 [L131] lk12 = 1 VAL [cond=-1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L134] COND TRUE p13 != 0 [L135] lk13 = 1 VAL [cond=-1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L138] COND TRUE p14 != 0 [L139] lk14 = 1 VAL [cond=-1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L144] COND FALSE !(p1 != 0) VAL [cond=-1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L149] COND FALSE !(p2 != 0) VAL [cond=-1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] [L217] __VERIFIER_error() VAL [cond=-1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=1, p11=1, p12=-1, p13=-1, p14=1, p2=0, p3=-1, p4=1, p5=1, p6=1, p7=-1, p8=0, p9=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 458 SDtfs, 227 SDslu, 301 SDs, 0 SdLazy, 20 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 5382 SizeOfPredicates, 0 NumberOfNonLiveVariables, 574 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...