/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 0.1.25-8fc6572 [2020-07-10 15:05:36,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 15:05:36,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 15:05:36,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 15:05:36,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 15:05:36,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 15:05:36,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 15:05:36,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 15:05:36,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 15:05:36,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 15:05:36,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 15:05:36,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 15:05:36,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 15:05:36,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 15:05:36,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 15:05:36,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 15:05:36,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 15:05:36,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 15:05:36,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 15:05:36,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 15:05:36,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 15:05:36,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 15:05:36,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 15:05:36,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 15:05:36,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 15:05:36,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 15:05:36,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 15:05:36,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 15:05:36,708 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 [2020-07-10 15:05:36,722 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 15:05:36,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 15:05:36,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-10 15:05:36,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-10 15:05:36,724 INFO L138 SettingsManager]: * Use SBE=true [2020-07-10 15:05:36,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 15:05:36,725 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 15:05:36,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 15:05:36,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 15:05:36,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 15:05:36,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 15:05:36,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 15:05:36,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 15:05:36,726 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 15:05:36,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 15:05:36,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 15:05:36,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 15:05:36,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 15:05:36,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-10 15:05:36,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 15:05:36,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 15:05:36,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 15:05:36,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 15:05:36,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-10 15:05:36,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-10 15:05:36,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-10 15:05:36,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-10 15:05:36,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 15:05:36,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-10 15:05:36,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-10 15:05:36,995 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 15:05:37,007 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 15:05:37,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 15:05:37,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 15:05:37,011 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 15:05:37,012 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-07-10 15:05:37,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06342308/0e01300661854791a4d91cbcd579fc75/FLAG9cf1e62c1 [2020-07-10 15:05:37,546 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 15:05:37,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-07-10 15:05:37,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06342308/0e01300661854791a4d91cbcd579fc75/FLAG9cf1e62c1 [2020-07-10 15:05:37,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06342308/0e01300661854791a4d91cbcd579fc75 [2020-07-10 15:05:37,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 15:05:37,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 15:05:37,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 15:05:37,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 15:05:37,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 15:05:37,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 03:05:37" (1/1) ... [2020-07-10 15:05:37,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee8142b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:37, skipping insertion in model container [2020-07-10 15:05:37,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 03:05:37" (1/1) ... [2020-07-10 15:05:37,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 15:05:37,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 15:05:38,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 15:05:38,127 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 15:05:38,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 15:05:38,162 INFO L208 MainTranslator]: Completed translation [2020-07-10 15:05:38,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38 WrapperNode [2020-07-10 15:05:38,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 15:05:38,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 15:05:38,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 15:05:38,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 15:05:38,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (1/1) ... [2020-07-10 15:05:38,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (1/1) ... [2020-07-10 15:05:38,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (1/1) ... [2020-07-10 15:05:38,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (1/1) ... [2020-07-10 15:05:38,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (1/1) ... [2020-07-10 15:05:38,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (1/1) ... [2020-07-10 15:05:38,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (1/1) ... [2020-07-10 15:05:38,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 15:05:38,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 15:05:38,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 15:05:38,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 15:05:38,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (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 [2020-07-10 15:05:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 15:05:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 15:05:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-07-10 15:05:38,353 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-07-10 15:05:38,353 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-07-10 15:05:38,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 15:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 15:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-07-10 15:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-07-10 15:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-10 15:05:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-10 15:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-07-10 15:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 15:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-10 15:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-10 15:05:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 15:05:38,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 15:05:38,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 15:05:38,664 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 15:05:38,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 03:05:38 BoogieIcfgContainer [2020-07-10 15:05:38,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 15:05:38,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 15:05:38,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 15:05:38,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 15:05:38,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 03:05:37" (1/3) ... [2020-07-10 15:05:38,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e053e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 03:05:38, skipping insertion in model container [2020-07-10 15:05:38,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:05:38" (2/3) ... [2020-07-10 15:05:38,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e053e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 03:05:38, skipping insertion in model container [2020-07-10 15:05:38,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 03:05:38" (3/3) ... [2020-07-10 15:05:38,677 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-07-10 15:05:38,687 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-10 15:05:38,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 15:05:38,708 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 15:05:38,730 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 15:05:38,730 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 15:05:38,731 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-10 15:05:38,731 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 15:05:38,731 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 15:05:38,731 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 15:05:38,731 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 15:05:38,731 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 15:05:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-10 15:05:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-10 15:05:38,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 15:05:38,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 15:05:38,757 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 15:05:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 15:05:38,762 INFO L82 PathProgramCache]: Analyzing trace with hash 589228543, now seen corresponding path program 1 times [2020-07-10 15:05:38,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 15:05:38,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644388703] [2020-07-10 15:05:38,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 15:05:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:05:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:05:39,075 INFO L280 TraceCheckUtils]: 0: Hoare triple {37#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {29#true} is VALID [2020-07-10 15:05:39,076 INFO L280 TraceCheckUtils]: 1: Hoare triple {29#true} assume true; {29#true} is VALID [2020-07-10 15:05:39,078 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {29#true} {29#true} #38#return; {29#true} is VALID [2020-07-10 15:05:39,083 INFO L263 TraceCheckUtils]: 0: Hoare triple {29#true} call ULTIMATE.init(); {37#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} is VALID [2020-07-10 15:05:39,084 INFO L280 TraceCheckUtils]: 1: Hoare triple {37#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {29#true} is VALID [2020-07-10 15:05:39,084 INFO L280 TraceCheckUtils]: 2: Hoare triple {29#true} assume true; {29#true} is VALID [2020-07-10 15:05:39,085 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {29#true} {29#true} #38#return; {29#true} is VALID [2020-07-10 15:05:39,087 INFO L263 TraceCheckUtils]: 4: Hoare triple {29#true} call #t~ret2 := main(); {29#true} is VALID [2020-07-10 15:05:39,092 INFO L280 TraceCheckUtils]: 5: Hoare triple {29#true} call ~#m~0.base, ~#m~0.offset := #Ultimate.allocOnStack(4);call write~int(0, ~#m~0.base, ~#m~0.offset, 4); {34#(= 0 (select (select |#memory_int| |main_~#m~0.base|) |main_~#m~0.offset|))} is VALID [2020-07-10 15:05:39,096 INFO L263 TraceCheckUtils]: 6: Hoare triple {34#(= 0 (select (select |#memory_int| |main_~#m~0.base|) |main_~#m~0.offset|))} call mutex_lock(~#m~0.base, ~#m~0.offset); {35#(= (select (select |#memory_int| |mutex_lock_#in~a.base|) |mutex_lock_#in~a.offset|) 0)} is VALID [2020-07-10 15:05:39,099 INFO L280 TraceCheckUtils]: 7: Hoare triple {35#(= (select (select |#memory_int| |mutex_lock_#in~a.base|) |mutex_lock_#in~a.offset|) 0)} ~a.base, ~a.offset := #in~a.base, #in~a.offset;call #t~mem0 := read~int(~a.base, ~a.offset, 4); {36#(= 0 |mutex_lock_#t~mem0|)} is VALID [2020-07-10 15:05:39,100 INFO L280 TraceCheckUtils]: 8: Hoare triple {36#(= 0 |mutex_lock_#t~mem0|)} assume 1 == #t~mem0;havoc #t~mem0; {30#false} is VALID [2020-07-10 15:05:39,101 INFO L263 TraceCheckUtils]: 9: Hoare triple {30#false} call err(); {30#false} is VALID [2020-07-10 15:05:39,101 INFO L280 TraceCheckUtils]: 10: Hoare triple {30#false} assume !false; {30#false} is VALID [2020-07-10 15:05:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 15:05:39,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644388703] [2020-07-10 15:05:39,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 15:05:39,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-10 15:05:39,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017905400] [2020-07-10 15:05:39,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-10 15:05:39,126 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 15:05:39,131 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2020-07-10 15:05:39,180 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:05:39,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-10 15:05:39,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-10 15:05:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-10 15:05:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-10 15:05:39,195 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-10 15:05:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:05:39,594 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-07-10 15:05:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-10 15:05:39,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-10 15:05:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 15:05:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-10 15:05:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 45 transitions. [2020-07-10 15:05:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-10 15:05:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 45 transitions. [2020-07-10 15:05:39,628 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 45 transitions. [2020-07-10 15:05:39,729 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 45 edges. 45 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:05:39,740 INFO L225 Difference]: With dead ends: 40 [2020-07-10 15:05:39,741 INFO L226 Difference]: Without dead ends: 18 [2020-07-10 15:05:39,745 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 [2020-07-10 15:05:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-10 15:05:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-10 15:05:39,796 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 15:05:39,797 INFO L82 GeneralOperation]: Start isEquivalent. First operand 18 states. Second operand 18 states. [2020-07-10 15:05:39,797 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 18 states. [2020-07-10 15:05:39,797 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 18 states. [2020-07-10 15:05:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:05:39,801 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2020-07-10 15:05:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-07-10 15:05:39,802 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:05:39,802 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:05:39,802 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 18 states. [2020-07-10 15:05:39,802 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 18 states. [2020-07-10 15:05:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:05:39,805 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2020-07-10 15:05:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-07-10 15:05:39,806 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:05:39,806 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:05:39,806 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 15:05:39,807 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 15:05:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-10 15:05:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2020-07-10 15:05:39,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 11 [2020-07-10 15:05:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 15:05:39,811 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2020-07-10 15:05:39,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-10 15:05:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-07-10 15:05:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-10 15:05:39,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 15:05:39,813 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 15:05:39,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 15:05:39,813 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 15:05:39,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 15:05:39,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1258570105, now seen corresponding path program 1 times [2020-07-10 15:05:39,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 15:05:39,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827317336] [2020-07-10 15:05:39,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 15:05:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 15:05:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 15:05:39,872 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-10 15:05:39,873 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-10 15:05:39,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 15:05:39,899 WARN L170 areAnnotationChecker]: mutex_unlockENTRY has no Hoare annotation [2020-07-10 15:05:39,899 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2020-07-10 15:05:39,899 WARN L170 areAnnotationChecker]: errENTRY has no Hoare annotation [2020-07-10 15:05:39,900 WARN L170 areAnnotationChecker]: errENTRY has no Hoare annotation [2020-07-10 15:05:39,900 WARN L170 areAnnotationChecker]: mutex_lockENTRY has no Hoare annotation [2020-07-10 15:05:39,900 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-10 15:05:39,900 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-10 15:05:39,900 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-10 15:05:39,900 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-10 15:05:39,901 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-10 15:05:39,901 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-10 15:05:39,901 WARN L170 areAnnotationChecker]: errFINAL has no Hoare annotation [2020-07-10 15:05:39,901 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2020-07-10 15:05:39,901 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2020-07-10 15:05:39,901 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-10 15:05:39,902 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-10 15:05:39,902 WARN L170 areAnnotationChecker]: L36 has no Hoare annotation [2020-07-10 15:05:39,902 WARN L170 areAnnotationChecker]: L36 has no Hoare annotation [2020-07-10 15:05:39,902 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2020-07-10 15:05:39,902 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2020-07-10 15:05:39,902 WARN L170 areAnnotationChecker]: L27-3 has no Hoare annotation [2020-07-10 15:05:39,902 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-10 15:05:39,903 WARN L170 areAnnotationChecker]: errEXIT has no Hoare annotation [2020-07-10 15:05:39,903 WARN L170 areAnnotationChecker]: errEXIT has no Hoare annotation [2020-07-10 15:05:39,903 WARN L170 areAnnotationChecker]: L21-1 has no Hoare annotation [2020-07-10 15:05:39,903 WARN L170 areAnnotationChecker]: L21-1 has no Hoare annotation [2020-07-10 15:05:39,903 WARN L170 areAnnotationChecker]: L21-3 has no Hoare annotation [2020-07-10 15:05:39,903 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-10 15:05:39,903 WARN L170 areAnnotationChecker]: L36-1 has no Hoare annotation [2020-07-10 15:05:39,903 WARN L170 areAnnotationChecker]: L36-1 has no Hoare annotation [2020-07-10 15:05:39,904 WARN L170 areAnnotationChecker]: mutex_unlockFINAL has no Hoare annotation [2020-07-10 15:05:39,904 WARN L170 areAnnotationChecker]: mutex_lockFINAL has no Hoare annotation [2020-07-10 15:05:39,904 WARN L170 areAnnotationChecker]: L40 has no Hoare annotation [2020-07-10 15:05:39,904 WARN L170 areAnnotationChecker]: mutex_lockEXIT has no Hoare annotation [2020-07-10 15:05:39,904 WARN L170 areAnnotationChecker]: mutex_lockEXIT has no Hoare annotation [2020-07-10 15:05:39,904 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-10 15:05:39,904 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-10 15:05:39,905 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-10 15:05:39,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.07 03:05:39 BoogieIcfgContainer [2020-07-10 15:05:39,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-10 15:05:39,911 INFO L168 Benchmark]: Toolchain (without parser) took 2000.13 ms. Allocated memory was 137.4 MB in the beginning and 233.3 MB in the end (delta: 95.9 MB). Free memory was 101.4 MB in the beginning and 187.5 MB in the end (delta: -86.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-10 15:05:39,911 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-10 15:05:39,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.33 ms. Allocated memory is still 137.4 MB. Free memory was 101.2 MB in the beginning and 90.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-10 15:05:39,913 INFO L168 Benchmark]: Boogie Preprocessor took 133.50 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.6 MB in the beginning and 180.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-10 15:05:39,914 INFO L168 Benchmark]: RCFGBuilder took 371.14 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 162.5 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-07-10 15:05:39,915 INFO L168 Benchmark]: TraceAbstraction took 1237.53 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 161.8 MB in the beginning and 187.5 MB in the end (delta: -25.7 MB). Peak memory consumption was 5.8 MB. Max. memory is 7.1 GB. [2020-07-10 15:05:39,919 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.33 ms. Allocated memory is still 137.4 MB. Free memory was 101.2 MB in the beginning and 90.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.50 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.6 MB in the beginning and 180.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.14 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 162.5 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1237.53 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 161.8 MB in the beginning and 187.5 MB in the end (delta: -25.7 MB). Peak memory consumption was 5.8 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 VAL [m={2:0}] [L36] CALL mutex_lock(&m) VAL [a={2:0}] [L21] EXPR a->is_locked VAL [a={2:0}, a={2:0}, a->is_locked=0] [L21] COND FALSE !(a->is_locked == 1) [L22] a->is_locked = 1 VAL [a={2:0}, a={2:0}] [L36] RET mutex_lock(&m) VAL [m={2:0}] [L40] CALL mutex_lock(&m) VAL [a={2:0}] [L21] EXPR a->is_locked VAL [a={2:0}, a={2:0}, a->is_locked=1] [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: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 8 SDslu, 38 SDs, 0 SdLazy, 38 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s 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...