/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:57:28,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:57:28,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:57:28,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:57:28,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:57:28,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:57:28,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:57:28,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:57:28,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:57:28,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:57:28,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:57:28,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:57:28,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:57:28,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:57:28,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:57:28,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:57:28,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:57:28,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:57:28,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:57:28,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:57:28,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:57:28,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:57:28,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:57:28,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:57:28,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:57:28,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:57:28,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:57:28,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:57:28,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:57:28,655 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:57:28,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:57:28,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:57:28,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:57:28,657 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:57:28,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:57:28,658 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:57:28,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:57:28,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:57:28,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:57:28,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:57:28,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:57:28,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:57:28,659 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:57:28,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:57:28,660 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:57:28,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:57:28,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:57:28,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:57:28,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:57:28,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:57:28,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:57:28,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:57:28,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:57:28,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:57:28,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:57:28,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:57:28,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:57:28,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:57:28,662 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 12:57:28,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:57:28,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:57:28,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:57:29,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:57:29,001 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:57:29,002 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-08-18 12:57:29,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7bb973358/689060b0e5224714acc81306d9941c13/FLAG01c0c37fe [2020-08-18 12:57:29,580 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:57:29,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-08-18 12:57:29,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7bb973358/689060b0e5224714acc81306d9941c13/FLAG01c0c37fe [2020-08-18 12:57:30,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7bb973358/689060b0e5224714acc81306d9941c13 [2020-08-18 12:57:30,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:57:30,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:57:30,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:57:30,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:57:30,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:57:30,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b961376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30, skipping insertion in model container [2020-08-18 12:57:30,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:57:30,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:57:30,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:57:30,260 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:57:30,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:57:30,288 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:57:30,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30 WrapperNode [2020-08-18 12:57:30,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:57:30,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:57:30,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:57:30,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:57:30,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (1/1) ... [2020-08-18 12:57:30,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:57:30,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:57:30,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:57:30,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:57:30,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 12:57:30,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:57:30,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:57:30,484 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-18 12:57:30,484 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-08-18 12:57:30,485 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-08-18 12:57:30,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:57:30,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:57:30,485 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-18 12:57:30,485 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-08-18 12:57:30,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 12:57:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 12:57:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-08-18 12:57:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:57:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 12:57:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 12:57:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:57:30,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:57:30,786 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:57:30,787 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 12:57:30,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:57:30 BoogieIcfgContainer [2020-08-18 12:57:30,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:57:30,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:57:30,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:57:30,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:57:30,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:57:30" (1/3) ... [2020-08-18 12:57:30,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b20bc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:57:30, skipping insertion in model container [2020-08-18 12:57:30,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:57:30" (2/3) ... [2020-08-18 12:57:30,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b20bc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:57:30, skipping insertion in model container [2020-08-18 12:57:30,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:57:30" (3/3) ... [2020-08-18 12:57:30,799 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-08-18 12:57:30,809 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:57:30,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:57:30,832 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:57:30,855 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:57:30,855 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:57:30,855 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:57:30,855 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:57:30,856 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:57:30,856 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:57:30,856 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:57:30,856 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:57:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-18 12:57:30,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 12:57:30,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:57:30,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:57:30,879 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:57:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:57:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash 589228543, now seen corresponding path program 1 times [2020-08-18 12:57:30,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:57:30,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004248017] [2020-08-18 12:57:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:57:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:57:31,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:57:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:57:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:57:31,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004248017] [2020-08-18 12:57:31,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:57:31,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:57:31,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394370415] [2020-08-18 12:57:31,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:57:31,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:57:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:57:31,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:57:31,168 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-08-18 12:57:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:57:31,340 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-08-18 12:57:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:57:31,342 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-18 12:57:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:57:31,351 INFO L225 Difference]: With dead ends: 40 [2020-08-18 12:57:31,351 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 12:57:31,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:57:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 12:57:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 12:57:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 12:57:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2020-08-18 12:57:31,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 11 [2020-08-18 12:57:31,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:57:31,392 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2020-08-18 12:57:31,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:57:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-08-18 12:57:31,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 12:57:31,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:57:31,394 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:57:31,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:57:31,395 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:57:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:57:31,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1258570105, now seen corresponding path program 1 times [2020-08-18 12:57:31,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:57:31,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919734697] [2020-08-18 12:57:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:57:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 12:57:31,418 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 12:57:31,418 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 12:57:31,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:57:31,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:57:31 BoogieIcfgContainer [2020-08-18 12:57:31,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:57:31,445 INFO L168 Benchmark]: Toolchain (without parser) took 1428.41 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 102.2 MB in the beginning and 128.5 MB in the end (delta: -26.3 MB). Peak memory consumption was 35.5 MB. Max. memory is 7.1 GB. [2020-08-18 12:57:31,446 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 121.2 MB in the beginning and 120.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-18 12:57:31,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.54 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 92.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-18 12:57:31,448 INFO L168 Benchmark]: Boogie Preprocessor took 127.31 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.3 MB in the beginning and 180.1 MB in the end (delta: -87.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-08-18 12:57:31,449 INFO L168 Benchmark]: RCFGBuilder took 373.82 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 166.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:57:31,450 INFO L168 Benchmark]: TraceAbstraction took 650.46 ms. Allocated memory is still 202.4 MB. Free memory was 165.8 MB in the beginning and 128.5 MB in the end (delta: 37.3 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. [2020-08-18 12:57:31,455 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 121.2 MB in the beginning and 120.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.54 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 92.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.31 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.3 MB in the beginning and 180.1 MB in the end (delta: -87.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 373.82 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 166.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 650.46 ms. Allocated memory is still 202.4 MB. Free memory was 165.8 MB in the beginning and 128.5 MB in the end (delta: 37.3 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L33] struct mutex m; [L34] m.is_locked = 0 [L36] CALL mutex_lock(&m) [L21] EXPR a->is_locked [L21] COND FALSE !(a->is_locked == 1) [L22] a->is_locked = 1 [L36] RET mutex_lock(&m) [L40] CALL mutex_lock(&m) [L21] EXPR a->is_locked [L21] COND TRUE a->is_locked == 1 [L21] CALL err() [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 8 SDslu, 38 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 330 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...