./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 791161d1 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-?-791161d [2022-07-22 21:19:44,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:19:44,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:19:44,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:19:44,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:19:44,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:19:44,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:19:44,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:19:44,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:19:44,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:19:44,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:19:44,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:19:44,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:19:44,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:19:44,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:19:44,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:19:44,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:19:44,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:19:44,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:19:44,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:19:44,951 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:19:44,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:19:44,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:19:44,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:19:44,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:19:44,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:19:44,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:19:44,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:19:44,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:19:44,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:19:44,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:19:44,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:19:44,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:19:44,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:19:44,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:19:44,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:19:44,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:19:44,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:19:44,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:19:44,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:19:44,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:19:44,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:19:44,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:19:45,001 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:19:45,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:19:45,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:19:45,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:19:45,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:19:45,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:19:45,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:19:45,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:19:45,004 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:19:45,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:19:45,005 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:19:45,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:19:45,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:19:45,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:19:45,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:19:45,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:19:45,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:19:45,006 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:19:45,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:19:45,007 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:19:45,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:19:45,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:19:45,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:19:45,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:19:45,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:19:45,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:19:45,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:19:45,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:19:45,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:19:45,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:19:45,009 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:19:45,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:19:45,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:19:45,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2022-07-22 21:19:45,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:19:45,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:19:45,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:19:45,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:19:45,237 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:19:45,239 INFO L432 ainManager$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 [2022-07-22 21:19:45,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a28036742/d2f10219b37c425e937b80ab7cf36362/FLAG46b78fa70 [2022-07-22 21:19:45,780 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:19:45,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-07-22 21:19:45,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a28036742/d2f10219b37c425e937b80ab7cf36362/FLAG46b78fa70 [2022-07-22 21:19:46,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a28036742/d2f10219b37c425e937b80ab7cf36362 [2022-07-22 21:19:46,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:19:46,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:19:46,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:19:46,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:19:46,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:19:46,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1092d3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46, skipping insertion in model container [2022-07-22 21:19:46,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:19:46,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:19:46,484 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] [2022-07-22 21:19:46,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:19:46,504 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:19:46,565 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] [2022-07-22 21:19:46,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:19:46,603 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:19:46,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46 WrapperNode [2022-07-22 21:19:46,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:19:46,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:19:46,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:19:46,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:19:46,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,674 INFO L137 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2022-07-22 21:19:46,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:19:46,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:19:46,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:19:46,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:19:46,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:19:46,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:19:46,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:19:46,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:19:46,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (1/1) ... [2022-07-22 21:19:46,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:19:46,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:19:46,756 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) [2022-07-22 21:19:46,766 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 [2022-07-22 21:19:46,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:19:46,799 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:19:46,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:19:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:19:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:19:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:19:46,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:19:46,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:19:46,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:19:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:19:46,806 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:19:46,909 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:19:46,910 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:19:47,078 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:19:47,161 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:19:47,161 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:19:47,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:19:47 BoogieIcfgContainer [2022-07-22 21:19:47,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:19:47,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:19:47,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:19:47,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:19:47,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:19:46" (1/3) ... [2022-07-22 21:19:47,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad8a9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:19:47, skipping insertion in model container [2022-07-22 21:19:47,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:19:46" (2/3) ... [2022-07-22 21:19:47,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad8a9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:19:47, skipping insertion in model container [2022-07-22 21:19:47,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:19:47" (3/3) ... [2022-07-22 21:19:47,171 INFO L111 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2022-07-22 21:19:47,176 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:19:47,184 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:19:47,184 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:19:47,184 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:19:47,252 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:47,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 97 transitions, 199 flow [2022-07-22 21:19:47,340 INFO L129 PetriNetUnfolder]: 10/108 cut-off events. [2022-07-22 21:19:47,340 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:19:47,345 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. [2022-07-22 21:19:47,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 97 transitions, 199 flow [2022-07-22 21:19:47,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 97 transitions, 199 flow [2022-07-22 21:19:47,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:47,365 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@4ab74d47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b3f8b6c [2022-07-22 21:19:47,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:19:47,380 INFO L129 PetriNetUnfolder]: 3/51 cut-off events. [2022-07-22 21:19:47,380 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:19:47,380 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:47,381 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] [2022-07-22 21:19:47,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:19:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:47,386 INFO L85 PathProgramCache]: Analyzing trace with hash 875002773, now seen corresponding path program 1 times [2022-07-22 21:19:47,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:47,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260388450] [2022-07-22 21:19:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:47,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:47,505 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:47,543 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:47,545 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:47,546 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-22 21:19:47,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-22 21:19:47,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-22 21:19:47,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:19:47,549 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:19:47,552 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:47,552 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:19:47,606 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:47,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 162 transitions, 336 flow [2022-07-22 21:19:47,681 INFO L129 PetriNetUnfolder]: 19/186 cut-off events. [2022-07-22 21:19:47,681 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:19:47,686 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. [2022-07-22 21:19:47,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 162 transitions, 336 flow [2022-07-22 21:19:47,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 162 transitions, 336 flow [2022-07-22 21:19:47,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:47,705 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@4ab74d47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b3f8b6c [2022-07-22 21:19:47,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:19:47,715 INFO L129 PetriNetUnfolder]: 5/85 cut-off events. [2022-07-22 21:19:47,716 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:19:47,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:47,720 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] [2022-07-22 21:19:47,721 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)] === [2022-07-22 21:19:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash 766098187, now seen corresponding path program 1 times [2022-07-22 21:19:47,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:47,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726010570] [2022-07-22 21:19:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:47,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:47,758 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:47,787 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:47,787 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:47,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:19:47,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:19:47,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-22 21:19:47,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:19:47,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:19:47,789 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:19:47,789 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:47,789 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:19:47,860 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:47,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 209 places, 227 transitions, 475 flow [2022-07-22 21:19:47,930 INFO L129 PetriNetUnfolder]: 28/264 cut-off events. [2022-07-22 21:19:47,931 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:19:47,936 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. [2022-07-22 21:19:47,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 227 transitions, 475 flow [2022-07-22 21:19:47,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 227 transitions, 475 flow [2022-07-22 21:19:47,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:47,947 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@4ab74d47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b3f8b6c [2022-07-22 21:19:47,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:19:47,963 INFO L129 PetriNetUnfolder]: 10/139 cut-off events. [2022-07-22 21:19:47,964 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:19:47,964 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:47,964 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] [2022-07-22 21:19:47,965 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)] === [2022-07-22 21:19:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1683144780, now seen corresponding path program 1 times [2022-07-22 21:19:47,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:47,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496376705] [2022-07-22 21:19:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:48,030 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:48,054 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:48,055 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:48,055 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:19:48,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:19:48,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:19:48,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:19:48,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:19:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:19:48,056 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:19:48,057 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:48,057 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:19:48,103 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:48,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 268 places, 292 transitions, 616 flow [2022-07-22 21:19:48,166 INFO L129 PetriNetUnfolder]: 37/342 cut-off events. [2022-07-22 21:19:48,167 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:19:48,171 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. [2022-07-22 21:19:48,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 292 transitions, 616 flow [2022-07-22 21:19:48,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 292 transitions, 616 flow [2022-07-22 21:19:48,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:48,182 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@4ab74d47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b3f8b6c [2022-07-22 21:19:48,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:19:48,200 INFO L129 PetriNetUnfolder]: 17/192 cut-off events. [2022-07-22 21:19:48,201 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:19:48,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:48,201 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] [2022-07-22 21:19:48,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:19:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1762984080, now seen corresponding path program 1 times [2022-07-22 21:19:48,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:48,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145227005] [2022-07-22 21:19:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:48,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:19:48,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:48,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145227005] [2022-07-22 21:19:48,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145227005] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:48,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:48,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:19:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716246467] [2022-07-22 21:19:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:48,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:19:48,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:48,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:19:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:19:48,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 292 [2022-07-22 21:19:48,396 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) [2022-07-22 21:19:48,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:48,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 292 [2022-07-22 21:19:48,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:48,999 INFO L129 PetriNetUnfolder]: 324/2573 cut-off events. [2022-07-22 21:19:48,999 INFO L130 PetriNetUnfolder]: For 496/496 co-relation queries the response was YES. [2022-07-22 21:19:49,031 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. [2022-07-22 21:19:49,050 INFO L132 encePairwiseOnDemand]: 266/292 looper letters, 12 selfloop transitions, 0 changer transitions 0/233 dead transitions. [2022-07-22 21:19:49,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 522 flow [2022-07-22 21:19:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:19:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:19:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 538 transitions. [2022-07-22 21:19:49,069 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9212328767123288 [2022-07-22 21:19:49,070 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 538 transitions. [2022-07-22 21:19:49,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 538 transitions. [2022-07-22 21:19:49,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:49,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 538 transitions. [2022-07-22 21:19:49,081 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) [2022-07-22 21:19:49,087 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) [2022-07-22 21:19:49,088 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) [2022-07-22 21:19:49,090 INFO L186 Difference]: Start difference. First operand has 268 places, 292 transitions, 616 flow. Second operand 2 states and 538 transitions. [2022-07-22 21:19:49,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 522 flow [2022-07-22 21:19:49,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 233 transitions, 510 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-22 21:19:49,103 INFO L242 Difference]: Finished difference. Result has 231 places, 233 transitions, 486 flow [2022-07-22 21:19:49,105 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} [2022-07-22 21:19:49,112 INFO L279 CegarLoopForPetriNet]: 268 programPoint places, -37 predicate places. [2022-07-22 21:19:49,112 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 233 transitions, 486 flow [2022-07-22 21:19:49,113 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) [2022-07-22 21:19:49,113 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:49,113 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] [2022-07-22 21:19:49,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:19:49,114 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)] === [2022-07-22 21:19:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1514932111, now seen corresponding path program 1 times [2022-07-22 21:19:49,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:49,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102834226] [2022-07-22 21:19:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:49,191 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:49,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:49,219 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:49,219 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:19:49,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:19:49,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:19:49,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:19:49,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:19:49,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:19:49,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:19:49,221 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:19:49,222 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:49,222 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:19:49,282 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:49,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 327 places, 357 transitions, 759 flow [2022-07-22 21:19:49,359 INFO L129 PetriNetUnfolder]: 46/420 cut-off events. [2022-07-22 21:19:49,360 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:19:49,371 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. [2022-07-22 21:19:49,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 357 transitions, 759 flow [2022-07-22 21:19:49,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 357 transitions, 759 flow [2022-07-22 21:19:49,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:49,404 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@4ab74d47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b3f8b6c [2022-07-22 21:19:49,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:19:49,424 INFO L129 PetriNetUnfolder]: 16/195 cut-off events. [2022-07-22 21:19:49,424 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:19:49,424 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:49,425 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] [2022-07-22 21:19:49,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:19:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash -395470315, now seen corresponding path program 1 times [2022-07-22 21:19:49,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:49,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57618618] [2022-07-22 21:19:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:49,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:19:49,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57618618] [2022-07-22 21:19:49,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57618618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:49,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:49,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:19:49,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325223250] [2022-07-22 21:19:49,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:49,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:19:49,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:19:49,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:19:49,502 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 357 [2022-07-22 21:19:49,503 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) [2022-07-22 21:19:49,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:49,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 357 [2022-07-22 21:19:49,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:51,438 INFO L129 PetriNetUnfolder]: 1215/7973 cut-off events. [2022-07-22 21:19:51,439 INFO L130 PetriNetUnfolder]: For 2359/2359 co-relation queries the response was YES. [2022-07-22 21:19:51,562 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. [2022-07-22 21:19:51,630 INFO L132 encePairwiseOnDemand]: 325/357 looper letters, 15 selfloop transitions, 0 changer transitions 0/285 dead transitions. [2022-07-22 21:19:51,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 285 transitions, 645 flow [2022-07-22 21:19:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:19:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:19:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 657 transitions. [2022-07-22 21:19:51,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9201680672268907 [2022-07-22 21:19:51,633 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 657 transitions. [2022-07-22 21:19:51,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 657 transitions. [2022-07-22 21:19:51,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:51,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 657 transitions. [2022-07-22 21:19:51,636 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) [2022-07-22 21:19:51,638 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) [2022-07-22 21:19:51,638 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) [2022-07-22 21:19:51,638 INFO L186 Difference]: Start difference. First operand has 327 places, 357 transitions, 759 flow. Second operand 2 states and 657 transitions. [2022-07-22 21:19:51,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 285 transitions, 645 flow [2022-07-22 21:19:51,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 285 transitions, 625 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-22 21:19:51,648 INFO L242 Difference]: Finished difference. Result has 282 places, 285 transitions, 595 flow [2022-07-22 21:19:51,648 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} [2022-07-22 21:19:51,649 INFO L279 CegarLoopForPetriNet]: 327 programPoint places, -45 predicate places. [2022-07-22 21:19:51,649 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 285 transitions, 595 flow [2022-07-22 21:19:51,650 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) [2022-07-22 21:19:51,650 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:51,650 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] [2022-07-22 21:19:51,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:19:51,650 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)] === [2022-07-22 21:19:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1565058835, now seen corresponding path program 1 times [2022-07-22 21:19:51,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:51,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860032482] [2022-07-22 21:19:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:51,672 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:19:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:19:51,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:19:51,694 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:19:51,694 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-22 21:19:51,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-22 21:19:51,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-22 21:19:51,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-22 21:19:51,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-22 21:19:51,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-22 21:19:51,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-22 21:19:51,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:19:51,696 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:19:51,697 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:19:51,697 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:19:51,757 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:19:51,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 904 flow [2022-07-22 21:19:51,977 INFO L129 PetriNetUnfolder]: 55/498 cut-off events. [2022-07-22 21:19:51,977 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:19:51,990 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. [2022-07-22 21:19:51,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 422 transitions, 904 flow [2022-07-22 21:19:51,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 422 transitions, 904 flow [2022-07-22 21:19:51,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:19:51,999 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@4ab74d47, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b3f8b6c [2022-07-22 21:19:51,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-22 21:19:52,016 INFO L129 PetriNetUnfolder]: 17/192 cut-off events. [2022-07-22 21:19:52,016 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:19:52,016 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:52,017 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] [2022-07-22 21:19:52,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:19:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash 301484826, now seen corresponding path program 1 times [2022-07-22 21:19:52,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:52,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079641612] [2022-07-22 21:19:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:52,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:19:52,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:52,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079641612] [2022-07-22 21:19:52,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079641612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:52,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:52,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:19:52,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779879728] [2022-07-22 21:19:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:52,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:19:52,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:52,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:19:52,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:19:52,047 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 422 [2022-07-22 21:19:52,048 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) [2022-07-22 21:19:52,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:52,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 422 [2022-07-22 21:19:52,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:19:57,535 INFO L129 PetriNetUnfolder]: 4374/24659 cut-off events. [2022-07-22 21:19:57,535 INFO L130 PetriNetUnfolder]: For 10297/10297 co-relation queries the response was YES. [2022-07-22 21:19:58,031 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. [2022-07-22 21:19:58,254 INFO L132 encePairwiseOnDemand]: 384/422 looper letters, 18 selfloop transitions, 0 changer transitions 0/337 dead transitions. [2022-07-22 21:19:58,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 337 transitions, 770 flow [2022-07-22 21:19:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:19:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:19:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 776 transitions. [2022-07-22 21:19:58,257 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.919431279620853 [2022-07-22 21:19:58,257 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 776 transitions. [2022-07-22 21:19:58,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 776 transitions. [2022-07-22 21:19:58,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:19:58,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 776 transitions. [2022-07-22 21:19:58,260 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) [2022-07-22 21:19:58,262 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) [2022-07-22 21:19:58,262 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) [2022-07-22 21:19:58,263 INFO L186 Difference]: Start difference. First operand has 386 places, 422 transitions, 904 flow. Second operand 2 states and 776 transitions. [2022-07-22 21:19:58,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 337 transitions, 770 flow [2022-07-22 21:19:58,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 337 transitions, 740 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-22 21:19:58,280 INFO L242 Difference]: Finished difference. Result has 333 places, 337 transitions, 704 flow [2022-07-22 21:19:58,281 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} [2022-07-22 21:19:58,283 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, -53 predicate places. [2022-07-22 21:19:58,286 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 337 transitions, 704 flow [2022-07-22 21:19:58,286 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) [2022-07-22 21:19:58,287 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:19:58,287 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] [2022-07-22 21:19:58,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:19:58,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:19:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:19:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash 117715470, now seen corresponding path program 1 times [2022-07-22 21:19:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:19:58,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253064494] [2022-07-22 21:19:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:19:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:19:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:19:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:19:58,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:19:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253064494] [2022-07-22 21:19:58,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253064494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:19:58,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:19:58,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 21:19:58,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662898694] [2022-07-22 21:19:58,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:19:58,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:19:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:19:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:19:58,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:19:58,573 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 422 [2022-07-22 21:19:58,577 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) [2022-07-22 21:19:58,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:19:58,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 422 [2022-07-22 21:19:58,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand