/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -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 0.2.0-7d8eed3 [2020-11-06 22:27:54,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:27:54,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:27:54,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:27:54,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:27:54,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:27:54,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:27:54,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:27:54,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:27:54,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:27:54,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:27:54,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:27:54,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:27:54,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:27:54,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:27:54,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:27:54,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:27:54,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:27:54,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:27:54,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:27:54,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:27:54,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:27:54,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:27:54,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:27:54,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:27:54,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:27:54,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:27:54,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:27:54,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:27:54,531 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:27:54,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:27:54,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:27:54,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:27:54,535 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:27:54,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:27:54,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:27:54,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:27:54,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:27:54,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:27:54,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:27:54,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:27:54,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:27:54,537 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:27:54,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:27:54,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:27:54,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:27:54,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:27:54,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:27:54,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:27:54,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:27:54,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:27:54,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:27:54,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:27:54,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:27:54,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:27:54,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:27:54,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:27:54,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:27:54,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:27:54,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:27:54,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:27:54,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:27:54,963 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:27:54,964 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:27:54,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-11-06 22:27:55,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bffbd456/a3c1ec7e7fc947c28b019ac77bba99e3/FLAGce5f9b63c [2020-11-06 22:27:55,607 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:27:55,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-11-06 22:27:55,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bffbd456/a3c1ec7e7fc947c28b019ac77bba99e3/FLAGce5f9b63c [2020-11-06 22:27:55,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bffbd456/a3c1ec7e7fc947c28b019ac77bba99e3 [2020-11-06 22:27:55,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:27:55,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:27:55,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:27:55,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:27:55,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:27:55,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:55" (1/1) ... [2020-11-06 22:27:56,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a320c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:55, skipping insertion in model container [2020-11-06 22:27:56,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:55" (1/1) ... [2020-11-06 22:27:56,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:27:56,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:27:56,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:27:56,271 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:27:56,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:27:56,306 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:27:56,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56 WrapperNode [2020-11-06 22:27:56,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:27:56,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:27:56,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:27:56,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:27:56,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (1/1) ... [2020-11-06 22:27:56,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (1/1) ... [2020-11-06 22:27:56,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (1/1) ... [2020-11-06 22:27:56,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (1/1) ... [2020-11-06 22:27:56,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (1/1) ... [2020-11-06 22:27:56,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (1/1) ... [2020-11-06 22:27:56,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (1/1) ... [2020-11-06 22:27:56,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:27:56,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:27:56,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:27:56,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:27:56,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:27:56,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:27:56,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:27:56,446 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:27:56,447 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-11-06 22:27:56,447 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-11-06 22:27:56,447 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-11-06 22:27:56,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:27:56,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:27:56,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:27:56,448 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:27:56,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:27:56,449 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-11-06 22:27:56,449 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-11-06 22:27:56,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:27:56,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:27:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-11-06 22:27:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:27:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:27:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:27:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:27:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:27:56,734 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:27:56,735 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:27:56,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:56 BoogieIcfgContainer [2020-11-06 22:27:56,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:27:56,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:27:56,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:27:56,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:27:56,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:27:55" (1/3) ... [2020-11-06 22:27:56,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ee3624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:56, skipping insertion in model container [2020-11-06 22:27:56,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:56" (2/3) ... [2020-11-06 22:27:56,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ee3624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:56, skipping insertion in model container [2020-11-06 22:27:56,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:56" (3/3) ... [2020-11-06 22:27:56,747 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-11-06 22:27:56,764 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:27:56,768 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:27:56,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:27:56,841 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:27:56,841 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:27:56,841 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:27:56,854 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:27:56,855 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:27:56,855 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:27:56,855 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:27:56,855 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:27:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-06 22:27:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:27:56,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:56,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:27:56,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1210577418, now seen corresponding path program 1 times [2020-11-06 22:27:56,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:56,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346520552] [2020-11-06 22:27:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:57,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:57,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346520552] [2020-11-06 22:27:57,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:57,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:27:57,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797139976] [2020-11-06 22:27:57,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:27:57,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:57,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:27:57,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:27:57,229 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 6 states. [2020-11-06 22:27:57,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:57,413 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-11-06 22:27:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:27:57,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-06 22:27:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:57,422 INFO L225 Difference]: With dead ends: 45 [2020-11-06 22:27:57,423 INFO L226 Difference]: Without dead ends: 19 [2020-11-06 22:27:57,426 INFO L677 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 [2020-11-06 22:27:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-06 22:27:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-06 22:27:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-06 22:27:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-11-06 22:27:57,472 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 12 [2020-11-06 22:27:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:57,472 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-11-06 22:27:57,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:27:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-11-06 22:27:57,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:27:57,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:57,474 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:27:57,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:27:57,474 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash 110801358, now seen corresponding path program 1 times [2020-11-06 22:27:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:57,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916903586] [2020-11-06 22:27:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:27:57,507 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:27:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:27:57,549 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:27:57,577 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:27:57,577 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:27:57,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:27:57,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:27:57 BoogieIcfgContainer [2020-11-06 22:27:57,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:27:57,612 INFO L168 Benchmark]: Toolchain (without parser) took 1630.54 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 87.4 MB in the end (delta: 38.3 MB). Peak memory consumption was 39.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:57,612 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:27:57,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:57,614 INFO L168 Benchmark]: Boogie Preprocessor took 60.59 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:57,615 INFO L168 Benchmark]: RCFGBuilder took 366.54 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 100.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:57,616 INFO L168 Benchmark]: TraceAbstraction took 869.92 ms. Allocated memory is still 151.0 MB. Free memory was 100.3 MB in the beginning and 87.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:57,620 INFO L339 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 151.0 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 319.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.59 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 366.54 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 100.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 869.92 ms. Allocated memory is still 151.0 MB. Free memory was 100.3 MB in the beginning and 87.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L35] struct mutex m; [L36] m.is_locked = 0 VAL [m={3:0}] [L38] CALL mutex_lock(&m) VAL [a={3:0}] [L23] EXPR a->is_locked VAL [a={3:0}, a={3:0}, a->is_locked=0] [L23] COND FALSE !(a->is_locked == 1) [L24] a->is_locked = 1 VAL [a={3:0}, a={3:0}] [L38] RET mutex_lock(&m) VAL [m={3:0}] [L42] CALL mutex_lock(&m) VAL [a={3:0}] [L23] EXPR a->is_locked VAL [a={3:0}, a={3:0}, a->is_locked=1] [L23] COND TRUE a->is_locked == 1 [L23] CALL err() [L15] CALL reach_error() [L3] __assert_fail("0", "mutex_lock_struct.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 8 SDslu, 41 SDs, 0 SdLazy, 38 SolverSat, 8 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=30occurred 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, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 605 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...