/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_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:27:50,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:27:50,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:27:50,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:27:50,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:27:50,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:27:50,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:27:50,177 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 22:27:50,215 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:27:50,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:27:50,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:27:50,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:27:50,218 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:27:50,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:27:50,218 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:27:50,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:27:50,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:27:50,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:27:50,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:27:50,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:27:50,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:27:50,219 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:27:50,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:27:50,220 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:27:50,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:27:50,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:27:50,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:27:50,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:27:50,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:27:50,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:27:50,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:27:50,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:27:50,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:27:50,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:27:50,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:27:50,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:27:50,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:27:50,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:27:50,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:27:50,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:27:50,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:27:50,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:27:50,589 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:27:50,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-11-06 22:27:50,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad6f48219/56bd78bb19c9490e9b8922ea20fe5e43/FLAG4ce68a5bd [2020-11-06 22:27:51,226 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:27:51,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-11-06 22:27:51,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad6f48219/56bd78bb19c9490e9b8922ea20fe5e43/FLAG4ce68a5bd [2020-11-06 22:27:51,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad6f48219/56bd78bb19c9490e9b8922ea20fe5e43 [2020-11-06 22:27:51,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:27:51,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:27:51,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:27:51,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:27:51,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:27:51,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432b8dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51, skipping insertion in model container [2020-11-06 22:27:51,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:27:51,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:27:51,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:27:51,830 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:27:51,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:27:51,866 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:27:51,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51 WrapperNode [2020-11-06 22:27:51,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:27:51,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:27:51,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:27:51,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:27:51,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (1/1) ... [2020-11-06 22:27:51,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:27:51,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:27:51,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:27:51,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:27:51,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (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 22:27:51,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:27:51,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:27:51,975 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:27:51,976 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-11-06 22:27:51,976 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-11-06 22:27:51,977 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-11-06 22:27:51,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:27:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:27:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:27:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:27:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:27:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-11-06 22:27:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-11-06 22:27:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:27:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:27:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-11-06 22:27:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:27:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:27:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:27:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:27:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:27:52,365 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:27:52,366 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:27:52,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:52 BoogieIcfgContainer [2020-11-06 22:27:52,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:27:52,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:27:52,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:27:52,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:27:52,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:27:51" (1/3) ... [2020-11-06 22:27:52,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186270bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:52, skipping insertion in model container [2020-11-06 22:27:52,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:27:51" (2/3) ... [2020-11-06 22:27:52,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186270bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:27:52, skipping insertion in model container [2020-11-06 22:27:52,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:27:52" (3/3) ... [2020-11-06 22:27:52,376 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2020-11-06 22:27:52,391 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:27:52,395 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:27:52,407 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:27:52,432 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:27:52,432 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:27:52,432 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:27:52,432 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:27:52,432 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:27:52,432 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:27:52,432 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:27:52,433 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:27:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-06 22:27:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:27:52,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:52,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:27:52,456 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:52,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1210577418, now seen corresponding path program 1 times [2020-11-06 22:27:52,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:52,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582829654] [2020-11-06 22:27:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:52,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:52,806 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 22:27:52,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582829654] [2020-11-06 22:27:52,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:52,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:27:52,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460372682] [2020-11-06 22:27:52,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:27:52,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:27:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:27:52,832 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 6 states. [2020-11-06 22:27:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:53,070 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-11-06 22:27:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:27:53,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-06 22:27:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:53,082 INFO L225 Difference]: With dead ends: 45 [2020-11-06 22:27:53,082 INFO L226 Difference]: Without dead ends: 19 [2020-11-06 22:27:53,086 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 22:27:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-06 22:27:53,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-06 22:27:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-06 22:27:53,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-11-06 22:27:53,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 12 [2020-11-06 22:27:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:53,129 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-11-06 22:27:53,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:27:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-11-06 22:27:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:27:53,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:53,131 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 22:27:53,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:27:53,131 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:53,132 INFO L82 PathProgramCache]: Analyzing trace with hash 110801358, now seen corresponding path program 1 times [2020-11-06 22:27:53,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:53,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577053074] [2020-11-06 22:27:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:27:53,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:27:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:27:53,188 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:27:53,214 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:27:53,214 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:27:53,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:27:53,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:27:53 BoogieIcfgContainer [2020-11-06 22:27:53,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:27:53,252 INFO L168 Benchmark]: Toolchain (without parser) took 1629.35 ms. Allocated memory is still 161.5 MB. Free memory was 136.1 MB in the beginning and 99.7 MB in the end (delta: 36.3 MB). Peak memory consumption was 36.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:53,253 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 161.5 MB. Free memory is still 133.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:27:53,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.47 ms. Allocated memory is still 161.5 MB. Free memory was 135.4 MB in the beginning and 126.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:53,255 INFO L168 Benchmark]: Boogie Preprocessor took 31.94 ms. Allocated memory is still 161.5 MB. Free memory was 126.4 MB in the beginning and 124.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:53,256 INFO L168 Benchmark]: RCFGBuilder took 467.43 ms. Allocated memory is still 161.5 MB. Free memory was 124.9 MB in the beginning and 111.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:53,256 INFO L168 Benchmark]: TraceAbstraction took 879.92 ms. Allocated memory is still 161.5 MB. Free memory was 111.0 MB in the beginning and 99.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:53,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 161.5 MB. Free memory is still 133.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.47 ms. Allocated memory is still 161.5 MB. Free memory was 135.4 MB in the beginning and 126.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.94 ms. Allocated memory is still 161.5 MB. Free memory was 126.4 MB in the beginning and 124.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 467.43 ms. Allocated memory is still 161.5 MB. Free memory was 124.9 MB in the beginning and 111.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 879.92 ms. Allocated memory is still 161.5 MB. Free memory was 111.0 MB in the beginning and 99.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.9 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: [L32] int m; [L33] m = 0 VAL [m={3:0}] [L35] CALL mutex_lock(&m) VAL [a={3:0}] [L20] EXPR \read(*a) VAL [\read(*a)=0, a={3:0}, a={3:0}] [L20] COND FALSE !(*a == 1) [L21] *a = 1 VAL [a={3:0}, a={3:0}] [L35] RET mutex_lock(&m) VAL [m={3:0}] [L39] CALL mutex_lock(&m) VAL [a={3:0}] [L20] EXPR \read(*a) VAL [\read(*a)=1, a={3:0}, a={3:0}] [L20] COND TRUE *a == 1 [L20] CALL err() [L16] CALL reach_error() [L3] __assert_fail("0", "mutex_lock_int.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...