./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6332124c2c0887b4532bb51389233d66d442c8a9 ............................................................................................................................................................................................................................................................................... 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 0.2.0-5485861 [2020-10-25 22:04:31,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:04:31,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:04:31,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:04:31,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:04:31,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:04:31,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:04:31,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:04:31,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:04:31,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:04:31,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:04:31,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:04:31,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:04:31,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:04:31,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:04:31,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:04:31,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:04:31,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:04:31,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:04:31,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:04:31,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:04:31,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:04:31,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:04:31,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:04:31,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:04:31,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:04:31,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:04:31,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:04:31,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:04:31,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:04:31,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:04:31,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:04:31,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:04:31,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:04:31,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:04:31,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:04:31,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:04:31,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:04:31,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:04:31,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:04:31,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:04:31,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:04:31,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:04:31,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:04:31,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:04:31,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:04:31,931 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:04:31,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:04:31,931 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:04:31,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:04:31,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:04:31,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:04:31,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:04:31,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:04:31,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:04:31,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:04:31,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:04:31,934 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:04:31,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:04:31,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:04:31,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:04:31,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:04:31,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:04:31,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:04:31,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:04:31,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:04:31,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:04:31,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:04:31,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:04:31,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:04:31,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:04:31,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6332124c2c0887b4532bb51389233d66d442c8a9 [2020-10-25 22:04:32,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:04:32,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:04:32,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:04:32,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:04:32,355 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:04:32,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2020-10-25 22:04:32,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb5b6da74/d48b56a75ec44e8686e773da5dd6d32b/FLAGd4616c2ba [2020-10-25 22:04:33,048 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:04:33,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2020-10-25 22:04:33,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb5b6da74/d48b56a75ec44e8686e773da5dd6d32b/FLAGd4616c2ba [2020-10-25 22:04:33,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb5b6da74/d48b56a75ec44e8686e773da5dd6d32b [2020-10-25 22:04:33,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:04:33,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:04:33,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:04:33,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:04:33,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:04:33,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ef71a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33, skipping insertion in model container [2020-10-25 22:04:33,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:04:33,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:04:33,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:04:33,658 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:04:33,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:04:33,692 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:04:33,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33 WrapperNode [2020-10-25 22:04:33,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:04:33,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:04:33,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:04:33,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:04:33,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:04:33,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:04:33,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:04:33,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:04:33,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (1/1) ... [2020-10-25 22:04:33,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:04:33,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:04:33,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:04:33,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:04:33,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (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 [2020-10-25 22:04:33,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:04:33,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:04:33,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 22:04:33,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:04:33,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:04:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:04:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:04:34,091 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:04:34,092 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-25 22:04:34,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:34 BoogieIcfgContainer [2020-10-25 22:04:34,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:04:34,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:04:34,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:04:34,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:04:34,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:04:33" (1/3) ... [2020-10-25 22:04:34,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed663dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:04:34, skipping insertion in model container [2020-10-25 22:04:34,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:33" (2/3) ... [2020-10-25 22:04:34,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed663dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:04:34, skipping insertion in model container [2020-10-25 22:04:34,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:34" (3/3) ... [2020-10-25 22:04:34,103 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-10-25 22:04:34,115 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:04:34,120 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-25 22:04:34,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-25 22:04:34,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:04:34,159 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:04:34,159 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:04:34,159 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:04:34,160 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:04:34,160 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:04:34,160 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:04:34,160 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:04:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 22:04:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-25 22:04:34,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:04:34,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-25 22:04:34,181 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:04:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:04:34,187 INFO L82 PathProgramCache]: Analyzing trace with hash 925605, now seen corresponding path program 1 times [2020-10-25 22:04:34,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:04:34,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239232176] [2020-10-25 22:04:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:04:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:04:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:04:34,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239232176] [2020-10-25 22:04:34,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:04:34,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:04:34,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202014751] [2020-10-25 22:04:34,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:04:34,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:04:34,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:04:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:04:34,484 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-25 22:04:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:04:34,514 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-25 22:04:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:04:34,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-25 22:04:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:04:34,527 INFO L225 Difference]: With dead ends: 27 [2020-10-25 22:04:34,527 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 22:04:34,531 INFO L677 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 [2020-10-25 22:04:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 22:04:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 22:04:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 22:04:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-25 22:04:34,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 4 [2020-10-25 22:04:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:04:34,584 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-25 22:04:34,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:04:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-25 22:04:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:04:34,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:04:34,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:04:34,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:04:34,591 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:04:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:04:34,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1812538254, now seen corresponding path program 1 times [2020-10-25 22:04:34,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:04:34,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345284009] [2020-10-25 22:04:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:04:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:04:34,651 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:04:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:04:34,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:04:34,717 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:04:34,718 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:04:34,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:04:34,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:04:34 BoogieIcfgContainer [2020-10-25 22:04:34,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:04:34,747 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:04:34,747 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:04:34,747 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:04:34,748 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:34" (3/4) ... [2020-10-25 22:04:34,750 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:04:34,790 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:04:34,791 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:04:34,793 INFO L168 Benchmark]: Toolchain (without parser) took 1367.57 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.6 MB in the beginning and 28.6 MB in the end (delta: -3.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:34,794 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 48.2 MB. Free memory was 34.8 MB in the beginning and 34.7 MB in the end (delta: 35.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:34,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.84 ms. Allocated memory is still 48.2 MB. Free memory was 24.9 MB in the beginning and 29.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:34,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.99 ms. Allocated memory is still 48.2 MB. Free memory was 29.0 MB in the beginning and 27.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:34,797 INFO L168 Benchmark]: Boogie Preprocessor took 47.20 ms. Allocated memory is still 48.2 MB. Free memory was 27.6 MB in the beginning and 26.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:34,797 INFO L168 Benchmark]: RCFGBuilder took 293.85 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 26.4 MB in the beginning and 37.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:34,798 INFO L168 Benchmark]: TraceAbstraction took 650.44 ms. Allocated memory is still 58.7 MB. Free memory was 36.5 MB in the beginning and 30.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:34,799 INFO L168 Benchmark]: Witness Printer took 44.01 ms. Allocated memory is still 58.7 MB. Free memory was 30.5 MB in the beginning and 28.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:34,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 48.2 MB. Free memory was 34.8 MB in the beginning and 34.7 MB in the end (delta: 35.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.84 ms. Allocated memory is still 48.2 MB. Free memory was 24.9 MB in the beginning and 29.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.99 ms. Allocated memory is still 48.2 MB. Free memory was 29.0 MB in the beginning and 27.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.20 ms. Allocated memory is still 48.2 MB. Free memory was 27.6 MB in the beginning and 26.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 293.85 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 26.4 MB in the beginning and 37.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 650.44 ms. Allocated memory is still 58.7 MB. Free memory was 36.5 MB in the beginning and 30.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Witness Printer took 44.01 ms. Allocated memory is still 58.7 MB. Free memory was 30.5 MB in the beginning and 28.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L35] struct mutex m; [L36] m.is_locked = 0 [L23] EXPR a->is_locked [L23] COND FALSE !(a->is_locked == 1) [L24] a->is_locked = 1 [L23] EXPR a->is_locked [L23] COND TRUE a->is_locked == 1 [L3] __assert_fail("0", "mutex_lock_struct.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, 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=17occurred 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, 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...