/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-06 01:37:38,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-06 01:37:38,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-06 01:37:38,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-06 01:37:38,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-06 01:37:38,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-06 01:37:38,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-06 01:37:38,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-06 01:37:38,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-06 01:37:38,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-06 01:37:38,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-06 01:37:38,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-06 01:37:38,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-06 01:37:38,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-06 01:37:38,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-06 01:37:38,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-06 01:37:38,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-06 01:37:38,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-06 01:37:38,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-06 01:37:38,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-06 01:37:38,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-06 01:37:38,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-06 01:37:38,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-06 01:37:38,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-06 01:37:38,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-06 01:37:38,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-06 01:37:38,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-06 01:37:38,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-06 01:37:38,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-06 01:37:38,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-06 01:37:38,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-06 01:37:38,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-06 01:37:38,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-06 01:37:38,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-06 01:37:38,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-06 01:37:38,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-06 01:37:38,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-06 01:37:38,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-06 01:37:38,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-06 01:37:38,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-06 01:37:38,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-06 01:37:38,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf [2022-12-06 01:37:38,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-06 01:37:38,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-06 01:37:39,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-06 01:37:39,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-06 01:37:39,002 INFO L138 SettingsManager]: * Use SBE=true [2022-12-06 01:37:39,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-06 01:37:39,003 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-06 01:37:39,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-06 01:37:39,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-06 01:37:39,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-06 01:37:39,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-06 01:37:39,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-06 01:37:39,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-06 01:37:39,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-06 01:37:39,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-06 01:37:39,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-06 01:37:39,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-06 01:37:39,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-06 01:37:39,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-06 01:37:39,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-06 01:37:39,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-06 01:37:39,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 01:37:39,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-06 01:37:39,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-06 01:37:39,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-06 01:37:39,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-06 01:37:39,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-06 01:37:39,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-06 01:37:39,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-06 01:37:39,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-06 01:37:39,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-06 01:37:39,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-06 01:37:39,389 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-06 01:37:39,390 INFO L275 PluginConnector]: CDTParser initialized [2022-12-06 01:37:39,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-06 01:37:40,497 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-06 01:37:40,801 INFO L351 CDTParser]: Found 1 translation units. [2022-12-06 01:37:40,802 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-06 01:37:40,820 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ef03bf8/4dbf937419234db0b27163de430a0ad7/FLAG56d48252f [2022-12-06 01:37:40,841 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ef03bf8/4dbf937419234db0b27163de430a0ad7 [2022-12-06 01:37:40,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-06 01:37:40,844 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-06 01:37:40,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-06 01:37:40,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-06 01:37:40,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-06 01:37:40,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 01:37:40" (1/1) ... [2022-12-06 01:37:40,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18571614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:40, skipping insertion in model container [2022-12-06 01:37:40,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 01:37:40" (1/1) ... [2022-12-06 01:37:40,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-06 01:37:40,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-06 01:37:41,081 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-06 01:37:41,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 01:37:41,389 INFO L203 MainTranslator]: Completed pre-run [2022-12-06 01:37:41,399 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-06 01:37:41,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 01:37:41,519 INFO L208 MainTranslator]: Completed translation [2022-12-06 01:37:41,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41 WrapperNode [2022-12-06 01:37:41,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-06 01:37:41,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-06 01:37:41,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-06 01:37:41,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-06 01:37:41,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,586 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-12-06 01:37:41,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-06 01:37:41,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-06 01:37:41,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-06 01:37:41,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-06 01:37:41,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,614 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-06 01:37:41,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-06 01:37:41,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-06 01:37:41,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-06 01:37:41,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (1/1) ... [2022-12-06 01:37:41,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 01:37:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:37:41,664 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) [2022-12-06 01:37:41,679 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 [2022-12-06 01:37:41,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-06 01:37:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-06 01:37:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-06 01:37:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-06 01:37:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-06 01:37:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-06 01:37:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-12-06 01:37:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-12-06 01:37:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-06 01:37:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-06 01:37:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-06 01:37:41,708 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-06 01:37:41,885 INFO L236 CfgBuilder]: Building ICFG [2022-12-06 01:37:41,886 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-06 01:37:42,005 INFO L277 CfgBuilder]: Performing block encoding [2022-12-06 01:37:42,010 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-06 01:37:42,011 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-06 01:37:42,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 01:37:42 BoogieIcfgContainer [2022-12-06 01:37:42,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-06 01:37:42,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-06 01:37:42,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-06 01:37:42,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-06 01:37:42,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 01:37:40" (1/3) ... [2022-12-06 01:37:42,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6148b510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 01:37:42, skipping insertion in model container [2022-12-06 01:37:42,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 01:37:41" (2/3) ... [2022-12-06 01:37:42,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6148b510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 01:37:42, skipping insertion in model container [2022-12-06 01:37:42,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 01:37:42" (3/3) ... [2022-12-06 01:37:42,019 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-12-06 01:37:42,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-06 01:37:42,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-06 01:37:42,036 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-06 01:37:42,102 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-06 01:37:42,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2022-12-06 01:37:42,172 INFO L130 PetriNetUnfolder]: 7/85 cut-off events. [2022-12-06 01:37:42,172 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:42,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-06 01:37:42,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 180 flow [2022-12-06 01:37:42,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 77 transitions, 160 flow [2022-12-06 01:37:42,182 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:42,196 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-06 01:37:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 77 transitions, 160 flow [2022-12-06 01:37:42,240 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-12-06 01:37:42,241 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:42,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 6/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-06 01:37:42,244 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-06 01:37:42,244 INFO L188 LiptonReduction]: Number of co-enabled transitions 722 [2022-12-06 01:37:44,405 INFO L203 LiptonReduction]: Total number of compositions: 62 [2022-12-06 01:37:44,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 01:37:44,424 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=false, mAutomataTypeConcurrency=REPEATED_LIPTON_PN, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4494d9a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 01:37:44,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-06 01:37:44,431 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-06 01:37:44,432 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:44,432 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:44,433 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:44,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash 89472530, now seen corresponding path program 1 times [2022-12-06 01:37:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339249663] [2022-12-06 01:37:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:44,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:37:44,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:37:44,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339249663] [2022-12-06 01:37:44,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339249663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:37:44,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:37:44,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 01:37:44,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868845600] [2022-12-06 01:37:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:37:44,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-06 01:37:44,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:37:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-06 01:37:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-06 01:37:44,659 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 01:37:44,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-12-06 01:37:44,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:37:44,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 01:37:44,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:37:44,714 INFO L130 PetriNetUnfolder]: 41/86 cut-off events. [2022-12-06 01:37:44,714 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 206 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2022-12-06 01:37:44,716 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-06 01:37:44,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2022-12-06 01:37:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-06 01:37:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-06 01:37:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-06 01:37:44,727 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-06 01:37:44,732 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2022-12-06 01:37:44,733 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:44,733 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 19 places, 23 transitions, 96 flow [2022-12-06 01:37:44,738 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 19 places, 23 transitions, 96 flow [2022-12-06 01:37:44,739 INFO L188 LiptonReduction]: Number of co-enabled transitions 20 [2022-12-06 01:37:44,790 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-06 01:37:44,793 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 61 [2022-12-06 01:37:44,796 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 22 transitions, 94 flow [2022-12-06 01:37:44,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-12-06 01:37:44,797 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:44,797 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:44,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-06 01:37:44,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:44,798 INFO L85 PathProgramCache]: Analyzing trace with hash -683595234, now seen corresponding path program 1 times [2022-12-06 01:37:44,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:44,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605808613] [2022-12-06 01:37:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:44,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:37:44,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:37:44,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605808613] [2022-12-06 01:37:44,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605808613] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 01:37:44,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 01:37:44,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 01:37:44,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210857895] [2022-12-06 01:37:44,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 01:37:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-06 01:37:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:37:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-06 01:37:44,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-06 01:37:44,899 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 01:37:44,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 22 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-06 01:37:44,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:37:44,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 01:37:44,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:37:44,953 INFO L130 PetriNetUnfolder]: 61/124 cut-off events. [2022-12-06 01:37:44,953 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:44,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 124 events. 61/124 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 360 event pairs, 15 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 360. Up to 85 conditions per place. [2022-12-06 01:37:44,955 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 32 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2022-12-06 01:37:44,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 36 transitions, 222 flow [2022-12-06 01:37:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-06 01:37:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-06 01:37:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 25 transitions. [2022-12-06 01:37:44,957 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2022-12-06 01:37:44,958 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2022-12-06 01:37:44,959 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:44,959 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 36 transitions, 222 flow [2022-12-06 01:37:44,961 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 36 transitions, 222 flow [2022-12-06 01:37:44,961 INFO L188 LiptonReduction]: Number of co-enabled transitions 0 [2022-12-06 01:37:44,961 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:37:44,962 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 4 [2022-12-06 01:37:44,962 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 36 transitions, 222 flow [2022-12-06 01:37:44,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-06 01:37:44,963 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:44,963 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:44,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-06 01:37:44,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1144895376, now seen corresponding path program 1 times [2022-12-06 01:37:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:44,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926805066] [2022-12-06 01:37:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:44,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:37:45,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:37:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926805066] [2022-12-06 01:37:45,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926805066] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 01:37:45,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830308689] [2022-12-06 01:37:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:45,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:45,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:37:45,052 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 01:37:45,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-06 01:37:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:45,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-06 01:37:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 01:37:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 01:37:45,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 01:37:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 01:37:45,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830308689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 01:37:45,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 01:37:45,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-06 01:37:45,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625227204] [2022-12-06 01:37:45,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 01:37:45,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-06 01:37:45,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:37:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-06 01:37:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-06 01:37:45,244 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 01:37:45,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 36 transitions, 222 flow. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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) [2022-12-06 01:37:45,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:37:45,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 01:37:45,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:37:45,533 INFO L130 PetriNetUnfolder]: 153/308 cut-off events. [2022-12-06 01:37:45,533 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:45,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 308 events. 153/308 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 881 event pairs, 6 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 1216. Up to 245 conditions per place. [2022-12-06 01:37:45,537 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 68 selfloop transitions, 33 changer transitions 0/101 dead transitions. [2022-12-06 01:37:45,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 101 transitions, 814 flow [2022-12-06 01:37:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-06 01:37:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-06 01:37:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 115 transitions. [2022-12-06 01:37:45,544 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2022-12-06 01:37:45,545 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 18 predicate places. [2022-12-06 01:37:45,547 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:45,548 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 101 transitions, 814 flow [2022-12-06 01:37:45,551 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 101 transitions, 814 flow [2022-12-06 01:37:45,552 INFO L188 LiptonReduction]: Number of co-enabled transitions 0 [2022-12-06 01:37:45,553 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:37:45,554 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 9 [2022-12-06 01:37:45,554 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 101 transitions, 814 flow [2022-12-06 01:37:45,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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) [2022-12-06 01:37:45,555 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:45,555 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:45,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-06 01:37:45,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:45,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1016566144, now seen corresponding path program 2 times [2022-12-06 01:37:45,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:45,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122757532] [2022-12-06 01:37:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-06 01:37:45,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:37:45,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122757532] [2022-12-06 01:37:45,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122757532] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 01:37:45,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223474296] [2022-12-06 01:37:45,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 01:37:45,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:45,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:37:45,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 01:37:45,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-06 01:37:46,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 01:37:46,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 01:37:46,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-06 01:37:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 01:37:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-06 01:37:46,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 01:37:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-06 01:37:46,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223474296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 01:37:46,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 01:37:46,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-06 01:37:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544038806] [2022-12-06 01:37:46,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 01:37:46,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-06 01:37:46,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:37:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-06 01:37:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-06 01:37:46,094 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 01:37:46,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 101 transitions, 814 flow. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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) [2022-12-06 01:37:46,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:37:46,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 01:37:46,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:37:46,241 INFO L130 PetriNetUnfolder]: 286/574 cut-off events. [2022-12-06 01:37:46,241 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:46,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2879 conditions, 574 events. 286/574 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2025 event pairs, 4 based on Foata normal form. 0/540 useless extension candidates. Maximal degree in co-relation 2850. Up to 499 conditions per place. [2022-12-06 01:37:46,246 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 172 selfloop transitions, 40 changer transitions 0/212 dead transitions. [2022-12-06 01:37:46,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 212 transitions, 2126 flow [2022-12-06 01:37:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-06 01:37:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-06 01:37:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2022-12-06 01:37:46,248 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2022-12-06 01:37:46,248 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 25 predicate places. [2022-12-06 01:37:46,249 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:46,249 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 212 transitions, 2126 flow [2022-12-06 01:37:46,255 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 212 transitions, 2126 flow [2022-12-06 01:37:46,255 INFO L188 LiptonReduction]: Number of co-enabled transitions 0 [2022-12-06 01:37:46,256 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:37:46,257 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 9 [2022-12-06 01:37:46,257 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 212 transitions, 2126 flow [2022-12-06 01:37:46,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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) [2022-12-06 01:37:46,257 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:46,257 INFO L213 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:46,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-06 01:37:46,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-06 01:37:46,463 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1675114296, now seen corresponding path program 3 times [2022-12-06 01:37:46,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:46,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859534580] [2022-12-06 01:37:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:46,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-06 01:37:46,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:37:46,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859534580] [2022-12-06 01:37:46,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859534580] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 01:37:46,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272485523] [2022-12-06 01:37:46,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-06 01:37:46,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:46,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:37:46,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 01:37:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-06 01:37:46,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-06 01:37:46,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 01:37:46,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-06 01:37:46,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 01:37:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-06 01:37:46,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 01:37:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-06 01:37:46,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272485523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 01:37:46,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 01:37:46,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-12-06 01:37:46,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046640836] [2022-12-06 01:37:46,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 01:37:46,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-06 01:37:46,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:37:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-06 01:37:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-12-06 01:37:47,017 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 01:37:47,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 212 transitions, 2126 flow. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 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) [2022-12-06 01:37:47,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:37:47,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 01:37:47,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:37:48,506 INFO L130 PetriNetUnfolder]: 775/1552 cut-off events. [2022-12-06 01:37:48,507 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:48,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9322 conditions, 1552 events. 775/1552 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6242 event pairs, 4 based on Foata normal form. 0/1491 useless extension candidates. Maximal degree in co-relation 9288. Up to 1409 conditions per place. [2022-12-06 01:37:48,520 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 484 selfloop transitions, 256 changer transitions 0/740 dead transitions. [2022-12-06 01:37:48,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 740 transitions, 8886 flow [2022-12-06 01:37:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-06 01:37:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-12-06 01:37:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 605 transitions. [2022-12-06 01:37:48,525 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45318352059925093 [2022-12-06 01:37:48,526 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 113 predicate places. [2022-12-06 01:37:48,527 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:48,527 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 740 transitions, 8886 flow [2022-12-06 01:37:48,545 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 740 transitions, 8886 flow [2022-12-06 01:37:48,545 INFO L188 LiptonReduction]: Number of co-enabled transitions 0 [2022-12-06 01:37:48,548 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:37:48,548 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 22 [2022-12-06 01:37:48,548 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 740 transitions, 8886 flow [2022-12-06 01:37:48,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 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) [2022-12-06 01:37:48,549 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:48,549 INFO L213 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:48,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-06 01:37:48,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:48,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1741477846, now seen corresponding path program 4 times [2022-12-06 01:37:48,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462456717] [2022-12-06 01:37:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:48,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-06 01:37:49,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:37:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462456717] [2022-12-06 01:37:49,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462456717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 01:37:49,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455561139] [2022-12-06 01:37:49,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-06 01:37:49,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:49,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:37:49,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 01:37:49,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-06 01:37:49,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-06 01:37:49,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 01:37:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 01:37:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 01:37:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-06 01:37:49,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 01:37:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-06 01:37:49,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455561139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 01:37:49,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 01:37:49,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-12-06 01:37:49,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217099055] [2022-12-06 01:37:49,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 01:37:49,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-06 01:37:49,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:37:49,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-06 01:37:49,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-06 01:37:49,604 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 01:37:49,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 740 transitions, 8886 flow. Second operand has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2022-12-06 01:37:49,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:37:49,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 01:37:49,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:37:50,400 INFO L130 PetriNetUnfolder]: 1495/2992 cut-off events. [2022-12-06 01:37:50,400 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:50,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20955 conditions, 2992 events. 1495/2992 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 12381 event pairs, 4 based on Foata normal form. 0/2891 useless extension candidates. Maximal degree in co-relation 20916. Up to 2849 conditions per place. [2022-12-06 01:37:50,426 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 1280 selfloop transitions, 220 changer transitions 0/1500 dead transitions. [2022-12-06 01:37:50,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 1500 transitions, 21006 flow [2022-12-06 01:37:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-06 01:37:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-06 01:37:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 181 transitions. [2022-12-06 01:37:50,428 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5484848484848485 [2022-12-06 01:37:50,433 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 134 predicate places. [2022-12-06 01:37:50,436 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:50,436 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 1500 transitions, 21006 flow [2022-12-06 01:37:50,471 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 1500 transitions, 21006 flow [2022-12-06 01:37:50,471 INFO L188 LiptonReduction]: Number of co-enabled transitions 0 [2022-12-06 01:37:50,475 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:37:50,476 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 43 [2022-12-06 01:37:50,476 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 1500 transitions, 21006 flow [2022-12-06 01:37:50,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2022-12-06 01:37:50,479 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:50,481 INFO L213 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:50,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-06 01:37:50,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:50,688 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:50,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1648388422, now seen corresponding path program 5 times [2022-12-06 01:37:50,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:50,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907711042] [2022-12-06 01:37:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:50,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-06 01:37:50,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:37:50,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907711042] [2022-12-06 01:37:50,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907711042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 01:37:50,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818778391] [2022-12-06 01:37:50,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-06 01:37:50,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:50,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:37:50,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 01:37:51,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-06 01:37:51,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-12-06 01:37:51,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 01:37:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-06 01:37:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 01:37:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-06 01:37:51,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 01:37:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-06 01:37:51,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818778391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 01:37:51,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 01:37:51,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-12-06 01:37:51,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144602700] [2022-12-06 01:37:51,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 01:37:51,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-06 01:37:51,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:37:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-06 01:37:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-12-06 01:37:51,606 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 01:37:51,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 1500 transitions, 21006 flow. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-12-06 01:37:51,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:37:51,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 01:37:51,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:37:53,715 INFO L130 PetriNetUnfolder]: 2906/5814 cut-off events. [2022-12-06 01:37:53,716 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:53,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46524 conditions, 5814 events. 2906/5814 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 28560 event pairs, 4 based on Foata normal form. 0/5696 useless extension candidates. Maximal degree in co-relation 46480. Up to 5535 conditions per place. [2022-12-06 01:37:53,762 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 2874 selfloop transitions, 666 changer transitions 0/3540 dead transitions. [2022-12-06 01:37:53,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 3540 transitions, 56646 flow [2022-12-06 01:37:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-06 01:37:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-06 01:37:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 166 transitions. [2022-12-06 01:37:53,764 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2022-12-06 01:37:53,764 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 151 predicate places. [2022-12-06 01:37:53,766 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:53,766 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 3540 transitions, 56646 flow [2022-12-06 01:37:53,857 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 3540 transitions, 56646 flow [2022-12-06 01:37:53,857 INFO L188 LiptonReduction]: Number of co-enabled transitions 0 [2022-12-06 01:37:53,865 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:37:53,866 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 101 [2022-12-06 01:37:53,866 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 3540 transitions, 56646 flow [2022-12-06 01:37:53,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-12-06 01:37:53,866 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:53,866 INFO L213 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:53,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-06 01:37:54,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:54,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash 107788124, now seen corresponding path program 6 times [2022-12-06 01:37:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:54,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430132507] [2022-12-06 01:37:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:37:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 20 proven. 256 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-06 01:37:54,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:37:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430132507] [2022-12-06 01:37:54,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430132507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 01:37:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920955] [2022-12-06 01:37:54,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-06 01:37:54,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:54,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:37:54,676 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 01:37:54,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-06 01:37:55,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-06 01:37:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 01:37:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-06 01:37:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 01:37:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 20 proven. 256 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-06 01:37:55,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 01:37:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 20 proven. 256 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-06 01:37:55,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 01:37:55,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 01:37:55,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 23 [2022-12-06 01:37:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444313637] [2022-12-06 01:37:55,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 01:37:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-06 01:37:55,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:37:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-06 01:37:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-06 01:37:55,436 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 01:37:55,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 3540 transitions, 56646 flow. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 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) [2022-12-06 01:37:55,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:37:55,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 01:37:55,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 01:37:59,222 INFO L130 PetriNetUnfolder]: 3570/7142 cut-off events. [2022-12-06 01:37:59,222 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 01:37:59,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64291 conditions, 7142 events. 3570/7142 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 36890 event pairs, 4 based on Foata normal form. 0/7016 useless extension candidates. Maximal degree in co-relation 64242. Up to 6811 conditions per place. [2022-12-06 01:37:59,273 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 3686 selfloop transitions, 814 changer transitions 0/4500 dead transitions. [2022-12-06 01:37:59,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 4500 transitions, 81006 flow [2022-12-06 01:37:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-06 01:37:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-06 01:37:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 197 transitions. [2022-12-06 01:37:59,275 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5969696969696969 [2022-12-06 01:37:59,277 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 172 predicate places. [2022-12-06 01:37:59,280 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 01:37:59,280 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 4500 transitions, 81006 flow [2022-12-06 01:37:59,394 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 4500 transitions, 81006 flow [2022-12-06 01:37:59,394 INFO L188 LiptonReduction]: Number of co-enabled transitions 0 [2022-12-06 01:37:59,409 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 01:37:59,411 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 134 [2022-12-06 01:37:59,411 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 4500 transitions, 81006 flow [2022-12-06 01:37:59,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 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) [2022-12-06 01:37:59,411 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 01:37:59,412 INFO L213 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 01:37:59,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-06 01:37:59,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:37:59,620 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 01:37:59,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 01:37:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash 101566372, now seen corresponding path program 7 times [2022-12-06 01:37:59,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 01:37:59,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370988786] [2022-12-06 01:37:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 01:37:59,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 01:37:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:38:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:38:02,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 01:38:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370988786] [2022-12-06 01:38:02,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370988786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 01:38:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822223926] [2022-12-06 01:38:02,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-06 01:38:02,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 01:38:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 01:38:02,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 01:38:02,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-06 01:38:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 01:38:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-06 01:38:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 01:38:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:38:03,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 01:38:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 01:38:03,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822223926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 01:38:03,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 01:38:03,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-06 01:38:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508922075] [2022-12-06 01:38:03,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 01:38:03,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-06 01:38:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 01:38:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-06 01:38:03,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-06 01:38:03,846 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 01:38:03,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 4500 transitions, 81006 flow. Second operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 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) [2022-12-06 01:38:03,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 01:38:03,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 01:38:03,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand