/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 23:48:24,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:48:24,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:48:24,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:48:24,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:48:24,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:48:24,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:48:24,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:48:24,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:48:24,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:48:24,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:48:24,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:48:24,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:48:24,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:48:24,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:48:24,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:48:24,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:48:24,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:48:24,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:48:24,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:48:24,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:48:24,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:48:24,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:48:24,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:48:24,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:48:24,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:48:24,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:48:24,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:48:24,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:48:24,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 23:48:24,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:48:24,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:48:24,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:48:24,615 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 [2020-08-21 23:48:24,655 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:48:24,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:48:24,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:48:24,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:48:24,658 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:48:24,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:48:24,658 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:48:24,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:48:24,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:48:24,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:48:24,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:48:24,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:48:24,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:48:24,661 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:48:24,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:48:24,661 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:48:24,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:48:24,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:48:24,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:48:24,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:48:24,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:48:24,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:48:24,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:48:24,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:48:24,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:48:24,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:48:24,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:48:24,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:48:24,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:48:24,664 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:48:24,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:48:24,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:48:24,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:48:24,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:48:24,989 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:48:24,989 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-08-21 23:48:25,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a7c0275e/28ee4d53d3bd401682ccbc7bfbfa37df/FLAG1093e1e61 [2020-08-21 23:48:25,474 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:48:25,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-08-21 23:48:25,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a7c0275e/28ee4d53d3bd401682ccbc7bfbfa37df/FLAG1093e1e61 [2020-08-21 23:48:25,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a7c0275e/28ee4d53d3bd401682ccbc7bfbfa37df [2020-08-21 23:48:25,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:48:25,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:48:25,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:25,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:48:25,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:48:25,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:25" (1/1) ... [2020-08-21 23:48:25,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1392f113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:25, skipping insertion in model container [2020-08-21 23:48:25,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:25" (1/1) ... [2020-08-21 23:48:25,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:48:25,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:48:26,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:26,064 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:48:26,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:26,094 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:48:26,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26 WrapperNode [2020-08-21 23:48:26,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:26,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:48:26,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:48:26,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:48:26,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (1/1) ... [2020-08-21 23:48:26,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (1/1) ... [2020-08-21 23:48:26,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (1/1) ... [2020-08-21 23:48:26,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (1/1) ... [2020-08-21 23:48:26,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (1/1) ... [2020-08-21 23:48:26,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (1/1) ... [2020-08-21 23:48:26,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (1/1) ... [2020-08-21 23:48:26,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:48:26,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:48:26,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:48:26,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:48:26,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (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 [2020-08-21 23:48:26,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:48:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:48:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-21 23:48:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-08-21 23:48:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-08-21 23:48:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:48:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:48:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-21 23:48:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-08-21 23:48:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 23:48:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 23:48:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-08-21 23:48:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:48:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:48:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:48:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:48:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:48:26,487 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:48:26,487 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 23:48:26,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:26 BoogieIcfgContainer [2020-08-21 23:48:26,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:48:26,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:48:26,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:48:26,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:48:26,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:48:25" (1/3) ... [2020-08-21 23:48:26,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30747bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:26, skipping insertion in model container [2020-08-21 23:48:26,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:26" (2/3) ... [2020-08-21 23:48:26,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30747bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:26, skipping insertion in model container [2020-08-21 23:48:26,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:26" (3/3) ... [2020-08-21 23:48:26,508 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-08-21 23:48:26,538 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:48:26,545 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:48:26,561 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:48:26,591 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:48:26,591 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:48:26,591 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:48:26,591 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:48:26,591 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:48:26,592 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:48:26,592 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:48:26,592 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:48:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-21 23:48:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 23:48:26,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:26,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:26,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:26,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:26,619 INFO L82 PathProgramCache]: Analyzing trace with hash 589228543, now seen corresponding path program 1 times [2020-08-21 23:48:26,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:26,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208687338] [2020-08-21 23:48:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:48:26,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208687338] [2020-08-21 23:48:26,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:26,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:48:26,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2291352] [2020-08-21 23:48:26,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:48:26,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:26,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:48:26,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:48:26,908 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-08-21 23:48:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:27,144 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-08-21 23:48:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 23:48:27,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-21 23:48:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:27,157 INFO L225 Difference]: With dead ends: 40 [2020-08-21 23:48:27,158 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 23:48:27,163 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 [2020-08-21 23:48:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 23:48:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 23:48:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 23:48:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2020-08-21 23:48:27,213 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 11 [2020-08-21 23:48:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:27,213 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2020-08-21 23:48:27,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:48:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-08-21 23:48:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 23:48:27,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:27,215 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:27,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:48:27,215 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:27,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1258570105, now seen corresponding path program 1 times [2020-08-21 23:48:27,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:27,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443386093] [2020-08-21 23:48:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:48:27,241 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:48:27,241 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:48:27,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:48:27,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:48:27 BoogieIcfgContainer [2020-08-21 23:48:27,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:48:27,266 INFO L168 Benchmark]: Toolchain (without parser) took 1401.67 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 104.2 MB in the beginning and 131.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:27,267 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 23:48:27,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.70 ms. Allocated memory is still 148.4 MB. Free memory was 104.0 MB in the beginning and 94.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:27,269 INFO L168 Benchmark]: Boogie Preprocessor took 123.35 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 94.2 MB in the beginning and 184.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:27,270 INFO L168 Benchmark]: RCFGBuilder took 276.61 ms. Allocated memory is still 205.5 MB. Free memory was 184.0 MB in the beginning and 170.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:27,271 INFO L168 Benchmark]: TraceAbstraction took 763.59 ms. Allocated memory is still 205.5 MB. Free memory was 169.1 MB in the beginning and 131.7 MB in the end (delta: 37.4 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:27,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.70 ms. Allocated memory is still 148.4 MB. Free memory was 104.0 MB in the beginning and 94.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.35 ms. Allocated memory was 148.4 MB in the beginning and 205.5 MB in the end (delta: 57.1 MB). Free memory was 94.2 MB in the beginning and 184.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 276.61 ms. Allocated memory is still 205.5 MB. Free memory was 184.0 MB in the beginning and 170.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 763.59 ms. Allocated memory is still 205.5 MB. Free memory was 169.1 MB in the beginning and 131.7 MB in the end (delta: 37.4 MB). Peak memory consumption was 37.4 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: 0.6s, 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, 0.1s 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...