./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fcaf98e9698415fefa37f25d310a7a516d84123 ............................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-8bd4bc6 [2020-07-28 17:58:03,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 17:58:03,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 17:58:03,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 17:58:03,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 17:58:03,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 17:58:03,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 17:58:03,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 17:58:03,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 17:58:03,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 17:58:03,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 17:58:03,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 17:58:03,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 17:58:03,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 17:58:03,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 17:58:03,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 17:58:03,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 17:58:03,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 17:58:03,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 17:58:03,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 17:58:03,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 17:58:03,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 17:58:03,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 17:58:03,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 17:58:03,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 17:58:03,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 17:58:03,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 17:58:03,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 17:58:03,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 17:58:03,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 17:58:03,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 17:58:03,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 17:58:03,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 17:58:03,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 17:58:03,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 17:58:03,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 17:58:03,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 17:58:03,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 17:58:03,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 17:58:03,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 17:58:03,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 17:58:03,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-28 17:58:03,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 17:58:03,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 17:58:03,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 17:58:03,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 17:58:03,674 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 17:58:03,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 17:58:03,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 17:58:03,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-28 17:58:03,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 17:58:03,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 17:58:03,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 17:58:03,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 17:58:03,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 17:58:03,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 17:58:03,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 17:58:03,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 17:58:03,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 17:58:03,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 17:58:03,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 17:58:03,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 17:58:03,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 17:58:03,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 17:58:03,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 17:58:03,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 17:58:03,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 17:58:03,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-28 17:58:03,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-28 17:58:03,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 17:58:03,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 17:58:03,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fcaf98e9698415fefa37f25d310a7a516d84123 [2020-07-28 17:58:04,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 17:58:04,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 17:58:04,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 17:58:04,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 17:58:04,022 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 17:58:04,023 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2020-07-28 17:58:04,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab751542/72862d860bad4db2bf2f5903f0f6af57/FLAGf9cc66bf7 [2020-07-28 17:58:04,527 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 17:58:04,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2020-07-28 17:58:04,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab751542/72862d860bad4db2bf2f5903f0f6af57/FLAGf9cc66bf7 [2020-07-28 17:58:04,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab751542/72862d860bad4db2bf2f5903f0f6af57 [2020-07-28 17:58:04,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 17:58:04,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 17:58:04,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 17:58:04,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 17:58:04,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 17:58:04,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:58:04" (1/1) ... [2020-07-28 17:58:04,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c27576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:04, skipping insertion in model container [2020-07-28 17:58:04,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:58:04" (1/1) ... [2020-07-28 17:58:04,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 17:58:04,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 17:58:05,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:58:05,138 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 17:58:05,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:58:05,172 INFO L208 MainTranslator]: Completed translation [2020-07-28 17:58:05,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05 WrapperNode [2020-07-28 17:58:05,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 17:58:05,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 17:58:05,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 17:58:05,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 17:58:05,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 17:58:05,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 17:58:05,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 17:58:05,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 17:58:05,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (1/1) ... [2020-07-28 17:58:05,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 17:58:05,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 17:58:05,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 17:58:05,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 17:58:05,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (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 [2020-07-28 17:58:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-28 17:58:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 17:58:05,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 17:58:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-28 17:58:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-28 17:58:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-28 17:58:05,569 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 17:58:05,569 INFO L295 CfgBuilder]: Removed 12 assume(true) statements. [2020-07-28 17:58:05,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:58:05 BoogieIcfgContainer [2020-07-28 17:58:05,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 17:58:05,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 17:58:05,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 17:58:05,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 17:58:05,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 05:58:04" (1/3) ... [2020-07-28 17:58:05,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4659a978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:58:05, skipping insertion in model container [2020-07-28 17:58:05,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:05" (2/3) ... [2020-07-28 17:58:05,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4659a978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:58:05, skipping insertion in model container [2020-07-28 17:58:05,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:58:05" (3/3) ... [2020-07-28 17:58:05,585 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-07-28 17:58:05,597 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 17:58:05,606 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-28 17:58:05,634 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-28 17:58:05,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 17:58:05,665 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 17:58:05,666 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 17:58:05,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 17:58:05,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 17:58:05,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 17:58:05,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 17:58:05,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 17:58:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-07-28 17:58:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-07-28 17:58:05,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:58:05,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-07-28 17:58:05,700 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:58:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:58:05,707 INFO L82 PathProgramCache]: Analyzing trace with hash 925605, now seen corresponding path program 1 times [2020-07-28 17:58:05,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 17:58:05,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963875346] [2020-07-28 17:58:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 17:58:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 17:58:05,883 INFO L280 TraceCheckUtils]: 0: Hoare triple {18#true} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {18#true} is VALID [2020-07-28 17:58:05,886 INFO L280 TraceCheckUtils]: 1: Hoare triple {18#true} havoc main_#res;havoc main_~#m~0.base, main_~#m~0.offset;call main_~#m~0.base, main_~#m~0.offset := #Ultimate.allocOnStack(4);call write~int(0, main_~#m~0.base, main_~#m~0.offset, 4);mutex_lock_#in~a.base, mutex_lock_#in~a.offset := main_~#m~0.base, main_~#m~0.offset;havoc mutex_lock_#t~mem0, mutex_lock_~a.base, mutex_lock_~a.offset;mutex_lock_~a.base, mutex_lock_~a.offset := mutex_lock_#in~a.base, mutex_lock_#in~a.offset;call mutex_lock_#t~mem0 := read~int(mutex_lock_~a.base, mutex_lock_~a.offset, 4); {20#(= 0 |ULTIMATE.start_mutex_lock_#t~mem0|)} is VALID [2020-07-28 17:58:05,888 INFO L280 TraceCheckUtils]: 2: Hoare triple {20#(= 0 |ULTIMATE.start_mutex_lock_#t~mem0|)} assume 1 == mutex_lock_#t~mem0;havoc mutex_lock_#t~mem0; {19#false} is VALID [2020-07-28 17:58:05,888 INFO L280 TraceCheckUtils]: 3: Hoare triple {19#false} assume !false; {19#false} is VALID [2020-07-28 17:58:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 17:58:05,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963875346] [2020-07-28 17:58:05,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 17:58:05,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-28 17:58:05,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525177313] [2020-07-28 17:58:05,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-07-28 17:58:05,901 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 17:58:05,905 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-28 17:58:05,927 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:58:05,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-28 17:58:05,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 17:58:05,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-28 17:58:05,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-28 17:58:05,939 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-07-28 17:58:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:58:06,003 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-28 17:58:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-28 17:58:06,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-07-28 17:58:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 17:58:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-28 17:58:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2020-07-28 17:58:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-28 17:58:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2020-07-28 17:58:06,015 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 26 transitions. [2020-07-28 17:58:06,060 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 17:58:06,069 INFO L225 Difference]: With dead ends: 25 [2020-07-28 17:58:06,070 INFO L226 Difference]: Without dead ends: 8 [2020-07-28 17:58:06,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-28 17:58:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-07-28 17:58:06,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-07-28 17:58:06,093 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 17:58:06,094 INFO L82 GeneralOperation]: Start isEquivalent. First operand 8 states. Second operand 8 states. [2020-07-28 17:58:06,094 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2020-07-28 17:58:06,095 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2020-07-28 17:58:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:58:06,096 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2020-07-28 17:58:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-07-28 17:58:06,097 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:58:06,097 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:58:06,097 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2020-07-28 17:58:06,098 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2020-07-28 17:58:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 17:58:06,099 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2020-07-28 17:58:06,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-07-28 17:58:06,100 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 17:58:06,100 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 17:58:06,100 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 17:58:06,100 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 17:58:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-28 17:58:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-07-28 17:58:06,104 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 4 [2020-07-28 17:58:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 17:58:06,105 INFO L479 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-07-28 17:58:06,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-28 17:58:06,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-07-28 17:58:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-07-28 17:58:06,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:58:06,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-07-28 17:58:06,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-28 17:58:06,107 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:58:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:58:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1810629644, now seen corresponding path program 1 times [2020-07-28 17:58:06,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 17:58:06,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212763776] [2020-07-28 17:58:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 17:58:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:58:06,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:58:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:58:06,151 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:58:06,173 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-28 17:58:06,173 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-28 17:58:06,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-28 17:58:06,199 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 17:58:06,199 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-28 17:58:06,199 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2020-07-28 17:58:06,200 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2020-07-28 17:58:06,200 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2020-07-28 17:58:06,200 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2020-07-28 17:58:06,201 WARN L170 areAnnotationChecker]: L21-1 has no Hoare annotation [2020-07-28 17:58:06,201 WARN L170 areAnnotationChecker]: L19 has no Hoare annotation [2020-07-28 17:58:06,201 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-28 17:58:06,201 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-28 17:58:06,202 WARN L170 areAnnotationChecker]: L13-1 has no Hoare annotation [2020-07-28 17:58:06,202 WARN L170 areAnnotationChecker]: L13-1 has no Hoare annotation [2020-07-28 17:58:06,202 WARN L170 areAnnotationChecker]: L21-3 has no Hoare annotation [2020-07-28 17:58:06,202 WARN L170 areAnnotationChecker]: L19-1 has no Hoare annotation [2020-07-28 17:58:06,203 WARN L170 areAnnotationChecker]: L31 has no Hoare annotation [2020-07-28 17:58:06,203 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 17:58:06,203 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. [2020-07-28 17:58:06,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 05:58:06 BoogieIcfgContainer [2020-07-28 17:58:06,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 17:58:06,206 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 17:58:06,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 17:58:06,207 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 17:58:06,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:58:05" (3/4) ... [2020-07-28 17:58:06,210 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-07-28 17:58:06,257 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-28 17:58:06,257 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 17:58:06,260 INFO L168 Benchmark]: Toolchain (without parser) took 1351.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 960.2 MB in the beginning and 1.1 GB in the end (delta: -112.1 MB). Peak memory consumption was 34.7 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:06,261 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:58:06,262 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.20 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:06,263 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -193.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:06,264 INFO L168 Benchmark]: Boogie Preprocessor took 26.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:06,265 INFO L168 Benchmark]: RCFGBuilder took 276.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:06,265 INFO L168 Benchmark]: TraceAbstraction took 628.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:06,266 INFO L168 Benchmark]: Witness Printer took 51.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:58:06,270 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 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 259.20 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 97.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -193.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 276.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 628.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 11.5 GB. * Witness Printer took 51.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 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 [L21] EXPR a->is_locked [L21] COND FALSE !(a->is_locked == 1) [L22] a->is_locked = 1 [L21] EXPR a->is_locked [L21] COND TRUE a->is_locked == 1 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 7 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 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...