/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=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:07:17,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:07:17,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:07:17,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:07:17,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:07:17,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:07:17,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:07:17,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:07:17,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:07:17,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:07:17,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:07:17,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:07:17,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:07:17,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:07:17,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:07:17,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:07:17,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:07:17,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:07:17,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:07:17,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:07:17,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:07:17,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:07:17,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:07:17,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:07:17,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:07:17,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:07:17,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:07:17,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:07:17,719 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 21:07:17,741 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:07:17,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:07:17,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:07:17,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:07:17,743 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:07:17,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:07:17,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:07:17,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:07:17,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:07:17,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:07:17,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:07:17,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:07:17,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:07:17,745 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:07:17,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:07:17,745 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:07:17,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:07:17,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:07:17,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:07:17,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:07:17,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:07:17,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:17,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:07:17,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:07:17,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:07:17,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:07:17,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:07:17,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:07:17,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:07:17,748 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:07:18,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:07:18,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:07:18,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:07:18,087 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:07:18,087 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:07:18,088 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-08-18 21:07:18,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a033fa604/eee0565c50e64f7fbedc8c816a4b881a/FLAG9950980ad [2020-08-18 21:07:18,550 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:18,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-08-18 21:07:18,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a033fa604/eee0565c50e64f7fbedc8c816a4b881a/FLAG9950980ad [2020-08-18 21:07:18,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a033fa604/eee0565c50e64f7fbedc8c816a4b881a [2020-08-18 21:07:18,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:18,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:18,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:18,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:18,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:18,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:18" (1/1) ... [2020-08-18 21:07:18,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1806b88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:18, skipping insertion in model container [2020-08-18 21:07:18,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:18" (1/1) ... [2020-08-18 21:07:18,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:18,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:19,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:19,174 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:19,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:19,212 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:19,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19 WrapperNode [2020-08-18 21:07:19,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:19,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:19,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:19,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:19,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (1/1) ... [2020-08-18 21:07:19,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (1/1) ... [2020-08-18 21:07:19,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (1/1) ... [2020-08-18 21:07:19,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (1/1) ... [2020-08-18 21:07:19,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (1/1) ... [2020-08-18 21:07:19,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (1/1) ... [2020-08-18 21:07:19,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (1/1) ... [2020-08-18 21:07:19,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:19,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:19,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:19,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:19,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (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 21:07:19,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:19,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:19,448 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-18 21:07:19,448 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-08-18 21:07:19,449 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-08-18 21:07:19,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-18 21:07:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-08-18 21:07:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:07:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:07:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-08-18 21:07:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:07:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:07:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:19,622 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:19,622 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 21:07:19,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:19 BoogieIcfgContainer [2020-08-18 21:07:19,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:19,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:19,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:19,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:19,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:18" (1/3) ... [2020-08-18 21:07:19,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a7130f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:19, skipping insertion in model container [2020-08-18 21:07:19,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:19" (2/3) ... [2020-08-18 21:07:19,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a7130f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:19, skipping insertion in model container [2020-08-18 21:07:19,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:19" (3/3) ... [2020-08-18 21:07:19,649 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2020-08-18 21:07:19,681 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:19,697 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:07:19,729 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:07:19,766 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:19,766 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:19,767 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:19,767 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:19,767 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:19,767 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:19,767 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:19,767 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-18 21:07:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 21:07:19,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:19,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:19,792 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash 589228543, now seen corresponding path program 1 times [2020-08-18 21:07:19,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:19,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173137996] [2020-08-18 21:07:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:20,053 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 21:07:20,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173137996] [2020-08-18 21:07:20,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:20,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:07:20,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242951669] [2020-08-18 21:07:20,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:07:20,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:07:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:07:20,075 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-08-18 21:07:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:20,252 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-08-18 21:07:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:07:20,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-18 21:07:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:20,264 INFO L225 Difference]: With dead ends: 40 [2020-08-18 21:07:20,264 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 21:07:20,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:07:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 21:07:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 21:07:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 21:07:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2020-08-18 21:07:20,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 11 [2020-08-18 21:07:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:20,312 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2020-08-18 21:07:20,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:07:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-08-18 21:07:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:07:20,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:20,314 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:20,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:20,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1258570105, now seen corresponding path program 1 times [2020-08-18 21:07:20,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:20,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535334475] [2020-08-18 21:07:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:07:20,338 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:07:20,338 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:07:20,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:20,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:20 BoogieIcfgContainer [2020-08-18 21:07:20,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:20,366 INFO L168 Benchmark]: Toolchain (without parser) took 1422.88 ms. Allocated memory was 139.5 MB in the beginning and 205.5 MB in the end (delta: 66.1 MB). Free memory was 102.9 MB in the beginning and 131.4 MB in the end (delta: -28.5 MB). Peak memory consumption was 37.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:20,367 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:07:20,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.71 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:20,369 INFO L168 Benchmark]: Boogie Preprocessor took 160.77 ms. Allocated memory was 139.5 MB in the beginning and 205.5 MB in the end (delta: 66.1 MB). Free memory was 93.0 MB in the beginning and 183.6 MB in the end (delta: -90.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:20,370 INFO L168 Benchmark]: RCFGBuilder took 257.43 ms. Allocated memory is still 205.5 MB. Free memory was 183.6 MB in the beginning and 169.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:20,371 INFO L168 Benchmark]: TraceAbstraction took 729.51 ms. Allocated memory is still 205.5 MB. Free memory was 168.9 MB in the beginning and 131.4 MB in the end (delta: 37.5 MB). Peak memory consumption was 37.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:20,375 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.71 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 160.77 ms. Allocated memory was 139.5 MB in the beginning and 205.5 MB in the end (delta: 66.1 MB). Free memory was 93.0 MB in the beginning and 183.6 MB in the end (delta: -90.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 257.43 ms. Allocated memory is still 205.5 MB. Free memory was 183.6 MB in the beginning and 169.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 729.51 ms. Allocated memory is still 205.5 MB. Free memory was 168.9 MB in the beginning and 131.4 MB in the end (delta: 37.5 MB). Peak memory consumption was 37.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L30] int m; [L31] m = 0 [L33] CALL mutex_lock(&m) [L18] EXPR \read(*a) [L18] COND FALSE !(*a == 1) [L19] *a = 1 [L33] RET mutex_lock(&m) [L37] CALL mutex_lock(&m) [L18] EXPR \read(*a) [L18] COND TRUE *a == 1 [L18] CALL err() [L14] __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: 0.2s, 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, 0.0s 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...