./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/pthread-ext/36_stack_cas_p0_vs_concur.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 e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:03:21,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:03:21,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:03:21,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:03:21,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:03:21,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:03:21,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:03:21,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:03:21,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:03:21,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:03:21,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:03:21,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:03:21,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:03:21,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:03:21,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:03:21,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:03:21,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:03:21,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:03:21,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:03:21,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:03:21,403 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:03:21,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:03:21,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:03:21,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:03:21,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:03:21,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:03:21,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:03:21,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:03:21,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:03:21,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:03:21,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:03:21,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:03:21,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:03:21,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:03:21,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:03:21,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:03:21,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:03:21,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:03:21,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:03:21,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:03:21,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:03:21,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:03:21,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:03:21,445 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:03:21,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:03:21,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:03:21,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:03:21,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:03:21,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:03:21,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:03:21,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:03:21,448 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:03:21,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:03:21,449 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:03:21,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:03:21,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:03:21,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:03:21,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:03:21,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:03:21,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:03:21,450 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:03:21,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:03:21,451 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:03:21,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:03:21,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:03:21,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:03:21,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:03:21,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:03:21,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:03:21,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:03:21,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:03:21,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:03:21,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:03:21,453 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:03:21,454 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:03:21,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:03:21,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2022-07-12 10:03:21,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:03:21,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:03:21,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:03:21,688 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:03:21,688 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:03:21,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-07-12 10:03:21,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf496089/493776621a524469891e868e8e1e2a48/FLAG3020eb664 [2022-07-12 10:03:22,110 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:03:22,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-07-12 10:03:22,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf496089/493776621a524469891e868e8e1e2a48/FLAG3020eb664 [2022-07-12 10:03:22,547 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bf496089/493776621a524469891e868e8e1e2a48 [2022-07-12 10:03:22,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:03:22,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:03:22,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:03:22,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:03:22,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:03:22,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:22,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2cc9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22, skipping insertion in model container [2022-07-12 10:03:22,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:22,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:03:22,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:03:22,921 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-07-12 10:03:22,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:03:22,931 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:03:22,966 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-07-12 10:03:22,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:03:22,993 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:03:22,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22 WrapperNode [2022-07-12 10:03:22,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:03:22,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:03:22,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:03:22,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:03:22,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,040 INFO L137 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2022-07-12 10:03:23,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:03:23,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:03:23,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:03:23,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:03:23,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:03:23,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:03:23,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:03:23,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:03:23,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (1/1) ... [2022-07-12 10:03:23,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:03:23,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:03:23,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:03:23,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:03:23,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:03:23,140 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-12 10:03:23,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-12 10:03:23,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:03:23,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:03:23,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:03:23,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:03:23,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:03:23,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:03:23,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:03:23,142 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:03:23,230 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:03:23,231 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:03:23,359 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:03:23,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:03:23,398 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:03:23,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:03:23 BoogieIcfgContainer [2022-07-12 10:03:23,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:03:23,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:03:23,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:03:23,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:03:23,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:03:22" (1/3) ... [2022-07-12 10:03:23,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3552420f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:03:23, skipping insertion in model container [2022-07-12 10:03:23,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:22" (2/3) ... [2022-07-12 10:03:23,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3552420f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:03:23, skipping insertion in model container [2022-07-12 10:03:23,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:03:23" (3/3) ... [2022-07-12 10:03:23,416 INFO L111 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2022-07-12 10:03:23,419 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:03:23,429 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:03:23,429 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:03:23,429 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:03:23,463 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:23,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 97 transitions, 199 flow [2022-07-12 10:03:23,509 INFO L129 PetriNetUnfolder]: 10/108 cut-off events. [2022-07-12 10:03:23,509 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:23,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 10/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 132 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2022-07-12 10:03:23,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 97 transitions, 199 flow [2022-07-12 10:03:23,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 97 transitions, 199 flow [2022-07-12 10:03:23,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:23,529 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@616ef060, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14580f21 [2022-07-12 10:03:23,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:03:23,551 INFO L129 PetriNetUnfolder]: 3/51 cut-off events. [2022-07-12 10:03:23,551 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:23,551 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:23,552 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:23,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:03:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash 875002773, now seen corresponding path program 1 times [2022-07-12 10:03:23,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:23,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302682204] [2022-07-12 10:03:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:23,696 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:23,747 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:23,748 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:23,749 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-12 10:03:23,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-12 10:03:23,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-12 10:03:23,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:03:23,751 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:03:23,755 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:23,755 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:03:23,801 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:23,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 162 transitions, 336 flow [2022-07-12 10:03:23,850 INFO L129 PetriNetUnfolder]: 19/186 cut-off events. [2022-07-12 10:03:23,850 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:03:23,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 186 events. 19/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 436 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-07-12 10:03:23,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 162 transitions, 336 flow [2022-07-12 10:03:23,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 162 transitions, 336 flow [2022-07-12 10:03:23,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:23,863 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@616ef060, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14580f21 [2022-07-12 10:03:23,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:03:23,877 INFO L129 PetriNetUnfolder]: 5/85 cut-off events. [2022-07-12 10:03:23,878 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:03:23,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:23,878 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:23,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-12 10:03:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:23,878 INFO L85 PathProgramCache]: Analyzing trace with hash 766098187, now seen corresponding path program 1 times [2022-07-12 10:03:23,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:23,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734353522] [2022-07-12 10:03:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:23,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:23,896 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:23,930 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:23,933 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:23,933 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:03:23,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:03:23,934 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-12 10:03:23,934 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:03:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:03:23,934 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:03:23,936 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:23,936 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:03:23,981 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:23,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 209 places, 227 transitions, 475 flow [2022-07-12 10:03:24,037 INFO L129 PetriNetUnfolder]: 28/264 cut-off events. [2022-07-12 10:03:24,038 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:03:24,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 264 events. 28/264 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 813 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2022-07-12 10:03:24,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 227 transitions, 475 flow [2022-07-12 10:03:24,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 227 transitions, 475 flow [2022-07-12 10:03:24,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:24,051 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@616ef060, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14580f21 [2022-07-12 10:03:24,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:03:24,092 INFO L129 PetriNetUnfolder]: 10/139 cut-off events. [2022-07-12 10:03:24,092 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:03:24,092 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:24,093 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:24,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:03:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:24,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1683144780, now seen corresponding path program 1 times [2022-07-12 10:03:24,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:24,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723666564] [2022-07-12 10:03:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:24,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:24,145 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:24,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:24,172 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:24,173 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:03:24,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:03:24,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:03:24,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:03:24,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:03:24,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:03:24,177 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:03:24,178 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:24,179 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:03:24,222 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:24,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 268 places, 292 transitions, 616 flow [2022-07-12 10:03:24,272 INFO L129 PetriNetUnfolder]: 37/342 cut-off events. [2022-07-12 10:03:24,272 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:03:24,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 342 events. 37/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1222 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 272. Up to 10 conditions per place. [2022-07-12 10:03:24,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 292 transitions, 616 flow [2022-07-12 10:03:24,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 292 transitions, 616 flow [2022-07-12 10:03:24,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:24,286 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@616ef060, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14580f21 [2022-07-12 10:03:24,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:03:24,301 INFO L129 PetriNetUnfolder]: 17/192 cut-off events. [2022-07-12 10:03:24,301 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:03:24,301 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:24,301 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:24,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-12 10:03:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1762984080, now seen corresponding path program 1 times [2022-07-12 10:03:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:24,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553581189] [2022-07-12 10:03:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:24,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:24,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:24,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553581189] [2022-07-12 10:03:24,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553581189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:24,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:24,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:03:24,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518161731] [2022-07-12 10:03:24,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:24,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:03:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:03:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:03:24,457 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 292 [2022-07-12 10:03:24,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 292 transitions, 616 flow. Second operand has 2 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:24,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:24,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 292 [2022-07-12 10:03:24,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:24,914 INFO L129 PetriNetUnfolder]: 324/2573 cut-off events. [2022-07-12 10:03:24,914 INFO L130 PetriNetUnfolder]: For 496/496 co-relation queries the response was YES. [2022-07-12 10:03:24,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 2573 events. 324/2573 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 21511 event pairs, 204 based on Foata normal form. 663/3046 useless extension candidates. Maximal degree in co-relation 988. Up to 325 conditions per place. [2022-07-12 10:03:24,951 INFO L132 encePairwiseOnDemand]: 266/292 looper letters, 12 selfloop transitions, 0 changer transitions 0/233 dead transitions. [2022-07-12 10:03:24,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 522 flow [2022-07-12 10:03:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:03:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:03:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 538 transitions. [2022-07-12 10:03:24,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9212328767123288 [2022-07-12 10:03:24,966 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 538 transitions. [2022-07-12 10:03:24,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 538 transitions. [2022-07-12 10:03:24,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:24,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 538 transitions. [2022-07-12 10:03:24,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 269.0) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:24,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:24,980 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:24,981 INFO L186 Difference]: Start difference. First operand has 268 places, 292 transitions, 616 flow. Second operand 2 states and 538 transitions. [2022-07-12 10:03:24,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 522 flow [2022-07-12 10:03:24,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 233 transitions, 510 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:03:24,991 INFO L242 Difference]: Finished difference. Result has 231 places, 233 transitions, 486 flow [2022-07-12 10:03:24,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=486, PETRI_PLACES=231, PETRI_TRANSITIONS=233} [2022-07-12 10:03:24,995 INFO L279 CegarLoopForPetriNet]: 268 programPoint places, -37 predicate places. [2022-07-12 10:03:24,996 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 233 transitions, 486 flow [2022-07-12 10:03:24,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:24,996 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:24,996 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:24,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:03:24,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-12 10:03:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:24,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1514932111, now seen corresponding path program 1 times [2022-07-12 10:03:24,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:24,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110050115] [2022-07-12 10:03:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:24,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:25,051 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:25,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:25,079 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:25,079 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-12 10:03:25,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-12 10:03:25,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-12 10:03:25,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-12 10:03:25,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-12 10:03:25,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-12 10:03:25,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:03:25,081 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:03:25,081 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:25,081 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:03:25,143 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:25,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 327 places, 357 transitions, 759 flow [2022-07-12 10:03:25,218 INFO L129 PetriNetUnfolder]: 46/420 cut-off events. [2022-07-12 10:03:25,218 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:03:25,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 420 events. 46/420 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1647 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 355. Up to 12 conditions per place. [2022-07-12 10:03:25,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 357 transitions, 759 flow [2022-07-12 10:03:25,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 357 transitions, 759 flow [2022-07-12 10:03:25,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:25,236 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@616ef060, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14580f21 [2022-07-12 10:03:25,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:03:25,251 INFO L129 PetriNetUnfolder]: 16/195 cut-off events. [2022-07-12 10:03:25,252 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:03:25,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:25,252 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:25,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:03:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:25,253 INFO L85 PathProgramCache]: Analyzing trace with hash -395470315, now seen corresponding path program 1 times [2022-07-12 10:03:25,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:25,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449494770] [2022-07-12 10:03:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:25,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:25,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:25,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449494770] [2022-07-12 10:03:25,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449494770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:25,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:25,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:03:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411892474] [2022-07-12 10:03:25,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:25,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:03:25,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:25,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:03:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:03:25,279 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 357 [2022-07-12 10:03:25,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 357 transitions, 759 flow. Second operand has 2 states, 2 states have (on average 306.5) internal successors, (613), 2 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:25,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:25,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 357 [2022-07-12 10:03:25,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:26,822 INFO L129 PetriNetUnfolder]: 1215/7973 cut-off events. [2022-07-12 10:03:26,823 INFO L130 PetriNetUnfolder]: For 2359/2359 co-relation queries the response was YES. [2022-07-12 10:03:26,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 7973 events. 1215/7973 cut-off events. For 2359/2359 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 86237 event pairs, 852 based on Foata normal form. 2472/9868 useless extension candidates. Maximal degree in co-relation 3238. Up to 1216 conditions per place. [2022-07-12 10:03:26,952 INFO L132 encePairwiseOnDemand]: 325/357 looper letters, 15 selfloop transitions, 0 changer transitions 0/285 dead transitions. [2022-07-12 10:03:26,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 285 transitions, 645 flow [2022-07-12 10:03:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:03:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:03:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 657 transitions. [2022-07-12 10:03:26,954 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9201680672268907 [2022-07-12 10:03:26,954 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 657 transitions. [2022-07-12 10:03:26,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 657 transitions. [2022-07-12 10:03:26,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:26,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 657 transitions. [2022-07-12 10:03:26,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:26,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:26,958 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:26,958 INFO L186 Difference]: Start difference. First operand has 327 places, 357 transitions, 759 flow. Second operand 2 states and 657 transitions. [2022-07-12 10:03:26,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 285 transitions, 645 flow [2022-07-12 10:03:26,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 285 transitions, 625 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-12 10:03:26,964 INFO L242 Difference]: Finished difference. Result has 282 places, 285 transitions, 595 flow [2022-07-12 10:03:26,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=595, PETRI_PLACES=282, PETRI_TRANSITIONS=285} [2022-07-12 10:03:26,966 INFO L279 CegarLoopForPetriNet]: 327 programPoint places, -45 predicate places. [2022-07-12 10:03:26,966 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 285 transitions, 595 flow [2022-07-12 10:03:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 306.5) internal successors, (613), 2 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:26,966 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:26,967 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:03:26,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:03:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1565058835, now seen corresponding path program 1 times [2022-07-12 10:03:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:26,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010034058] [2022-07-12 10:03:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:26,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:26,981 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:26,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:26,994 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:26,994 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-12 10:03:26,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-12 10:03:26,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-12 10:03:26,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-12 10:03:26,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-12 10:03:26,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-12 10:03:26,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-12 10:03:26,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:03:26,995 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:03:26,996 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:26,996 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:03:27,040 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:27,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 904 flow [2022-07-12 10:03:27,124 INFO L129 PetriNetUnfolder]: 55/498 cut-off events. [2022-07-12 10:03:27,125 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:03:27,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 55/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2057 event pairs, 0 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 439. Up to 14 conditions per place. [2022-07-12 10:03:27,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 422 transitions, 904 flow [2022-07-12 10:03:27,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 422 transitions, 904 flow [2022-07-12 10:03:27,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:27,143 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@616ef060, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14580f21 [2022-07-12 10:03:27,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-12 10:03:27,155 INFO L129 PetriNetUnfolder]: 17/192 cut-off events. [2022-07-12 10:03:27,155 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:03:27,155 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:27,155 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:27,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:03:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash 301484826, now seen corresponding path program 1 times [2022-07-12 10:03:27,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:27,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557637189] [2022-07-12 10:03:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:27,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:27,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:27,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557637189] [2022-07-12 10:03:27,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557637189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:27,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:27,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:03:27,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160528704] [2022-07-12 10:03:27,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:27,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:03:27,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:27,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:03:27,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:03:27,226 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 422 [2022-07-12 10:03:27,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 422 transitions, 904 flow. Second operand has 2 states, 2 states have (on average 361.5) internal successors, (723), 2 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:27,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:27,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 422 [2022-07-12 10:03:27,227 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:32,333 INFO L129 PetriNetUnfolder]: 4374/24659 cut-off events. [2022-07-12 10:03:32,333 INFO L130 PetriNetUnfolder]: For 10297/10297 co-relation queries the response was YES. [2022-07-12 10:03:32,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32868 conditions, 24659 events. 4374/24659 cut-off events. For 10297/10297 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 319107 event pairs, 3282 based on Foata normal form. 8871/31792 useless extension candidates. Maximal degree in co-relation 10447. Up to 4375 conditions per place. [2022-07-12 10:03:32,848 INFO L132 encePairwiseOnDemand]: 384/422 looper letters, 18 selfloop transitions, 0 changer transitions 0/337 dead transitions. [2022-07-12 10:03:32,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 337 transitions, 770 flow [2022-07-12 10:03:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:03:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:03:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 776 transitions. [2022-07-12 10:03:32,969 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.919431279620853 [2022-07-12 10:03:32,969 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 776 transitions. [2022-07-12 10:03:32,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 776 transitions. [2022-07-12 10:03:32,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:32,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 776 transitions. [2022-07-12 10:03:32,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 388.0) internal successors, (776), 2 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:32,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:32,972 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:32,972 INFO L186 Difference]: Start difference. First operand has 386 places, 422 transitions, 904 flow. Second operand 2 states and 776 transitions. [2022-07-12 10:03:32,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 337 transitions, 770 flow [2022-07-12 10:03:32,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 337 transitions, 740 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-12 10:03:32,996 INFO L242 Difference]: Finished difference. Result has 333 places, 337 transitions, 704 flow [2022-07-12 10:03:32,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=704, PETRI_PLACES=333, PETRI_TRANSITIONS=337} [2022-07-12 10:03:33,005 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, -53 predicate places. [2022-07-12 10:03:33,006 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 337 transitions, 704 flow [2022-07-12 10:03:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 361.5) internal successors, (723), 2 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:33,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:33,006 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:03:33,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:03:33,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:03:33,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash 117715470, now seen corresponding path program 1 times [2022-07-12 10:03:33,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:33,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152015795] [2022-07-12 10:03:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:03:33,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:33,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152015795] [2022-07-12 10:03:33,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152015795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:33,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:33,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:03:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644529094] [2022-07-12 10:03:33,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:33,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:03:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:33,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:03:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:03:33,320 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 422 [2022-07-12 10:03:33,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 337 transitions, 704 flow. Second operand has 13 states, 13 states have (on average 292.38461538461536) internal successors, (3801), 13 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:03:33,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:33,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 422 [2022-07-12 10:03:33,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand