/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:54:36,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:54:36,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:54:36,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 11:54:36,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:54:36,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:54:36,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:54:36,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:54:36,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:54:36,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:54:36,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:54:36,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:54:36,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:54:36,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:54:36,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:54:36,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:54:36,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 11:54:36,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:54:36,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:54:36,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:54:36,592 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-VariableLbe.epf [2023-01-28 11:54:36,612 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:54:36,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:54:36,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:54:36,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:54:36,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:54:36,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:54:36,614 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:54:36,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:54:36,614 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:54:36,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:54:36,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:54:36,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:54:36,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:54:36,616 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:54:36,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:54:36,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:54:36,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:54:36,793 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:54:36,793 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:54:36,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-01-28 11:54:37,645 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:54:37,799 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:54:37,800 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-01-28 11:54:37,804 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73b298da7/f74cebdfc898439981c889c20ba65d30/FLAG72312b134 [2023-01-28 11:54:37,813 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73b298da7/f74cebdfc898439981c889c20ba65d30 [2023-01-28 11:54:37,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:54:37,816 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:54:37,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:54:37,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:54:37,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:54:37,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:37,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a6d944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37, skipping insertion in model container [2023-01-28 11:54:37,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:37,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:54:37,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:54:37,927 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-01-28 11:54:37,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:54:37,939 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:54:37,951 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-01-28 11:54:37,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:54:37,958 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:54:37,958 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:54:37,963 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:54:37,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37 WrapperNode [2023-01-28 11:54:37,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:54:37,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:54:37,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:54:37,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:54:37,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:37,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,010 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2023-01-28 11:54:38,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:54:38,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:54:38,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:54:38,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:54:38,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,039 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:54:38,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:54:38,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:54:38,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:54:38,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (1/1) ... [2023-01-28 11:54:38,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:54:38,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:38,073 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) [2023-01-28 11:54:38,091 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 [2023-01-28 11:54:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:54:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:54:38,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:54:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:54:38,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:54:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:54:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:54:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:54:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:54:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:54:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 11:54:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:54:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:54:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:54:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:54:38,106 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 11:54:38,229 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:54:38,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:54:38,396 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:54:38,468 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:54:38,468 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 11:54:38,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:54:38 BoogieIcfgContainer [2023-01-28 11:54:38,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:54:38,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:54:38,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:54:38,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:54:38,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:54:37" (1/3) ... [2023-01-28 11:54:38,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5d2fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:54:38, skipping insertion in model container [2023-01-28 11:54:38,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:54:37" (2/3) ... [2023-01-28 11:54:38,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5d2fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:54:38, skipping insertion in model container [2023-01-28 11:54:38,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:54:38" (3/3) ... [2023-01-28 11:54:38,479 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-01-28 11:54:38,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:54:38,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:54:38,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:54:38,529 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 11:54:38,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 110 transitions, 236 flow [2023-01-28 11:54:38,591 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-01-28 11:54:38,591 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:54:38,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 9/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-01-28 11:54:38,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 110 transitions, 236 flow [2023-01-28 11:54:38,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 100 transitions, 212 flow [2023-01-28 11:54:38,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:54:38,604 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 100 transitions, 212 flow [2023-01-28 11:54:38,606 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 100 transitions, 212 flow [2023-01-28 11:54:38,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 100 transitions, 212 flow [2023-01-28 11:54:38,635 INFO L130 PetriNetUnfolder]: 9/100 cut-off events. [2023-01-28 11:54:38,635 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:54:38,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 9/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-01-28 11:54:38,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-01-28 11:54:41,192 INFO L134 LiptonReduction]: Checked pairs total: 513 [2023-01-28 11:54:41,192 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-01-28 11:54:41,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:54:41,209 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5604d4bc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:54:41,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 11:54:41,213 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 11:54:41,213 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:54:41,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:41,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:41,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:41,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1991554592, now seen corresponding path program 1 times [2023-01-28 11:54:41,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:41,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860456256] [2023-01-28 11:54:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:41,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:54:41,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:41,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860456256] [2023-01-28 11:54:41,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860456256] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:54:41,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:54:41,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:54:41,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384145468] [2023-01-28 11:54:41,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:54:41,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:54:41,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:41,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:54:41,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:54:41,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 211 [2023-01-28 11:54:41,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2023-01-28 11:54:41,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:41,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 211 [2023-01-28 11:54:41,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:41,758 INFO L130 PetriNetUnfolder]: 59/111 cut-off events. [2023-01-28 11:54:41,758 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-01-28 11:54:41,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 111 events. 59/111 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 267 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 100. Up to 43 conditions per place. [2023-01-28 11:54:41,760 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 28 selfloop transitions, 4 changer transitions 4/36 dead transitions. [2023-01-28 11:54:41,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 36 transitions, 174 flow [2023-01-28 11:54:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:54:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:54:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2023-01-28 11:54:41,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43838862559241704 [2023-01-28 11:54:41,769 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2023-01-28 11:54:41,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2023-01-28 11:54:41,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:41,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2023-01-28 11:54:41,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 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) [2023-01-28 11:54:41,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-01-28 11:54:41,778 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-01-28 11:54:41,779 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 4 states and 370 transitions. [2023-01-28 11:54:41,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 36 transitions, 174 flow [2023-01-28 11:54:41,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 11:54:41,782 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 61 flow [2023-01-28 11:54:41,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-28 11:54:41,785 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-01-28 11:54:41,785 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 61 flow [2023-01-28 11:54:41,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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) [2023-01-28 11:54:41,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:41,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:41,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:54:41,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:41,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash 220979605, now seen corresponding path program 1 times [2023-01-28 11:54:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042177803] [2023-01-28 11:54:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:41,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:54:41,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:41,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042177803] [2023-01-28 11:54:41,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042177803] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:54:41,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:54:41,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:54:41,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803011145] [2023-01-28 11:54:41,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:54:41,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:54:41,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:54:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:54:41,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-28 11:54:41,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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) [2023-01-28 11:54:41,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:41,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-28 11:54:41,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:41,851 INFO L130 PetriNetUnfolder]: 87/173 cut-off events. [2023-01-28 11:54:41,851 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-28 11:54:41,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 173 events. 87/173 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 566 event pairs, 26 based on Foata normal form. 12/157 useless extension candidates. Maximal degree in co-relation 224. Up to 117 conditions per place. [2023-01-28 11:54:41,852 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 20 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-01-28 11:54:41,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 136 flow [2023-01-28 11:54:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:54:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:54:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-01-28 11:54:41,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49447077409162715 [2023-01-28 11:54:41,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-01-28 11:54:41,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-01-28 11:54:41,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:41,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-01-28 11:54:41,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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) [2023-01-28 11:54:41,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-01-28 11:54:41,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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) [2023-01-28 11:54:41,857 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 61 flow. Second operand 3 states and 313 transitions. [2023-01-28 11:54:41,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 136 flow [2023-01-28 11:54:41,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 11:54:41,858 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 75 flow [2023-01-28 11:54:41,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-01-28 11:54:41,861 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-01-28 11:54:41,861 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 75 flow [2023-01-28 11:54:41,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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) [2023-01-28 11:54:41,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:41,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:41,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:54:41,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:41,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2120815196, now seen corresponding path program 1 times [2023-01-28 11:54:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:41,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552486533] [2023-01-28 11:54:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:41,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:41,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552486533] [2023-01-28 11:54:41,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552486533] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:54:41,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:54:41,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:54:41,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223142104] [2023-01-28 11:54:41,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:54:41,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:54:41,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:41,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:54:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:54:41,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-28 11:54:41,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 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) [2023-01-28 11:54:41,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:41,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-28 11:54:41,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:42,044 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-01-28 11:54:42,044 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-01-28 11:54:42,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 130 events. 61/130 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 355 event pairs, 44 based on Foata normal form. 6/136 useless extension candidates. Maximal degree in co-relation 249. Up to 103 conditions per place. [2023-01-28 11:54:42,045 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-01-28 11:54:42,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 148 flow [2023-01-28 11:54:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:54:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:54:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 351 transitions. [2023-01-28 11:54:42,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158767772511848 [2023-01-28 11:54:42,047 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 351 transitions. [2023-01-28 11:54:42,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 351 transitions. [2023-01-28 11:54:42,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:42,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 351 transitions. [2023-01-28 11:54:42,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 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) [2023-01-28 11:54:42,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-01-28 11:54:42,050 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-01-28 11:54:42,050 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 75 flow. Second operand 4 states and 351 transitions. [2023-01-28 11:54:42,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 148 flow [2023-01-28 11:54:42,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 11:54:42,051 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 76 flow [2023-01-28 11:54:42,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-01-28 11:54:42,052 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-01-28 11:54:42,052 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 76 flow [2023-01-28 11:54:42,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 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) [2023-01-28 11:54:42,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:42,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:42,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 11:54:42,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:42,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2067904534, now seen corresponding path program 1 times [2023-01-28 11:54:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:42,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870877579] [2023-01-28 11:54:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:42,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:42,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870877579] [2023-01-28 11:54:42,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870877579] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:42,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762403865] [2023-01-28 11:54:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:42,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:42,313 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) [2023-01-28 11:54:42,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 11:54:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 11:54:42,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:42,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 11:54:42,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:54:42,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:54:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:54:42,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:42,689 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= 5 (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2023-01-28 11:54:42,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:54:42,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-01-28 11:54:42,706 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:54:42,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 289 [2023-01-28 11:54:42,717 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:54:42,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 86 [2023-01-28 11:54:42,729 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 11:54:42,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 67 [2023-01-28 11:54:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-28 11:54:42,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762403865] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:42,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:42,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-01-28 11:54:42,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525808621] [2023-01-28 11:54:42,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:42,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:54:42,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:54:42,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=104, Unknown=7, NotChecked=22, Total=182 [2023-01-28 11:54:42,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-01-28 11:54:42,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 76 flow. Second operand has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 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) [2023-01-28 11:54:42,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:42,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-01-28 11:54:42,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:42,806 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) c_~queue~0.offset .cse1)))) (= 5 (select .cse0 (+ c_~queue~0.offset .cse1)))))) (= c_~queue~0.offset 0) (= 5 c_~x~0) (= c_~front~0 0) (= 5 (select (select |c_#memory_int| c_~queue~0.base) 0))) is different from false [2023-01-28 11:54:42,917 INFO L130 PetriNetUnfolder]: 136/258 cut-off events. [2023-01-28 11:54:42,918 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-01-28 11:54:42,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 258 events. 136/258 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 962 event pairs, 21 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 665. Up to 79 conditions per place. [2023-01-28 11:54:42,921 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 39 selfloop transitions, 16 changer transitions 14/69 dead transitions. [2023-01-28 11:54:42,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 69 transitions, 363 flow [2023-01-28 11:54:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 11:54:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 11:54:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 681 transitions. [2023-01-28 11:54:42,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358609794628752 [2023-01-28 11:54:42,923 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 681 transitions. [2023-01-28 11:54:42,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 681 transitions. [2023-01-28 11:54:42,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:42,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 681 transitions. [2023-01-28 11:54:42,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.66666666666667) internal successors, (681), 9 states have internal predecessors, (681), 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) [2023-01-28 11:54:42,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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) [2023-01-28 11:54:42,928 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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) [2023-01-28 11:54:42,928 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 76 flow. Second operand 9 states and 681 transitions. [2023-01-28 11:54:42,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 69 transitions, 363 flow [2023-01-28 11:54:42,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 69 transitions, 353 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-28 11:54:42,930 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 185 flow [2023-01-28 11:54:42,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-01-28 11:54:42,932 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 15 predicate places. [2023-01-28 11:54:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 185 flow [2023-01-28 11:54:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 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) [2023-01-28 11:54:42,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:42,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:42,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:43,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:43,137 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:43,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2125347476, now seen corresponding path program 2 times [2023-01-28 11:54:43,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:43,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591276224] [2023-01-28 11:54:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:43,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:43,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:43,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591276224] [2023-01-28 11:54:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591276224] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759019691] [2023-01-28 11:54:43,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:54:43,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:43,490 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) [2023-01-28 11:54:43,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 11:54:43,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:54:43,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 11:54:43,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:43,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:54:43,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 11:54:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:54:43,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:54:43,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 11:54:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:43,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:43,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:54:43,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2023-01-28 11:54:43,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-01-28 11:54:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:43,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759019691] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:43,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:43,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-01-28 11:54:43,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131365296] [2023-01-28 11:54:43,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:43,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:54:43,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:54:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=140, Unknown=2, NotChecked=0, Total=182 [2023-01-28 11:54:43,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-01-28 11:54:43,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 185 flow. Second operand has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 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) [2023-01-28 11:54:43,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:43,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-01-28 11:54:43,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:43,895 INFO L130 PetriNetUnfolder]: 148/276 cut-off events. [2023-01-28 11:54:43,895 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-01-28 11:54:43,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 276 events. 148/276 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1026 event pairs, 21 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 992. Up to 173 conditions per place. [2023-01-28 11:54:43,896 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 35 selfloop transitions, 9 changer transitions 9/53 dead transitions. [2023-01-28 11:54:43,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 378 flow [2023-01-28 11:54:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:54:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:54:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-01-28 11:54:43,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990521327014218 [2023-01-28 11:54:43,898 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-01-28 11:54:43,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-01-28 11:54:43,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:43,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-01-28 11:54:43,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 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) [2023-01-28 11:54:43,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:43,900 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:43,900 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 185 flow. Second operand 5 states and 421 transitions. [2023-01-28 11:54:43,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 378 flow [2023-01-28 11:54:43,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 362 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-28 11:54:43,905 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 204 flow [2023-01-28 11:54:43,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-01-28 11:54:43,907 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 18 predicate places. [2023-01-28 11:54:43,907 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 204 flow [2023-01-28 11:54:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 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) [2023-01-28 11:54:43,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:43,908 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:43,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:44,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:44,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:44,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1479539105, now seen corresponding path program 3 times [2023-01-28 11:54:44,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:44,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419287842] [2023-01-28 11:54:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:44,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:44,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419287842] [2023-01-28 11:54:44,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419287842] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:44,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241018569] [2023-01-28 11:54:44,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:54:44,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:44,169 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) [2023-01-28 11:54:44,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 11:54:44,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:54:44,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:44,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 11:54:44,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:44,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:44,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241018569] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:44,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:44,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-01-28 11:54:44,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403667932] [2023-01-28 11:54:44,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:44,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:54:44,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:44,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:54:44,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:54:44,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-28 11:54:44,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-01-28 11:54:44,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:44,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-28 11:54:44,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:44,332 INFO L130 PetriNetUnfolder]: 248/479 cut-off events. [2023-01-28 11:54:44,332 INFO L131 PetriNetUnfolder]: For 941/941 co-relation queries the response was YES. [2023-01-28 11:54:44,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 479 events. 248/479 cut-off events. For 941/941 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2155 event pairs, 80 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1742. Up to 306 conditions per place. [2023-01-28 11:54:44,335 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 40 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2023-01-28 11:54:44,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 446 flow [2023-01-28 11:54:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:54:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:54:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-01-28 11:54:44,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49881516587677727 [2023-01-28 11:54:44,336 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-01-28 11:54:44,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-01-28 11:54:44,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:44,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-01-28 11:54:44,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 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) [2023-01-28 11:54:44,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-01-28 11:54:44,338 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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) [2023-01-28 11:54:44,338 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 204 flow. Second operand 4 states and 421 transitions. [2023-01-28 11:54:44,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 446 flow [2023-01-28 11:54:44,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 417 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-28 11:54:44,342 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 287 flow [2023-01-28 11:54:44,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-01-28 11:54:44,343 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 20 predicate places. [2023-01-28 11:54:44,343 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 287 flow [2023-01-28 11:54:44,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-01-28 11:54:44,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:44,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:44,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:44,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:44,548 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:44,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1493740304, now seen corresponding path program 4 times [2023-01-28 11:54:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:44,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254811553] [2023-01-28 11:54:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:44,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:44,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:44,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254811553] [2023-01-28 11:54:44,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254811553] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:44,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973050861] [2023-01-28 11:54:44,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:54:44,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:44,686 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) [2023-01-28 11:54:44,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 11:54:44,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:54:44,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:54:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:44,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:44,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973050861] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:44,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:44,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-01-28 11:54:44,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760839808] [2023-01-28 11:54:44,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:44,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:54:44,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:54:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-01-28 11:54:44,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-28 11:54:44,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 83.64285714285714) internal successors, (1171), 14 states have internal predecessors, (1171), 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) [2023-01-28 11:54:44,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:44,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-28 11:54:44,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:45,099 INFO L130 PetriNetUnfolder]: 288/586 cut-off events. [2023-01-28 11:54:45,100 INFO L131 PetriNetUnfolder]: For 1418/1418 co-relation queries the response was YES. [2023-01-28 11:54:45,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 586 events. 288/586 cut-off events. For 1418/1418 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2913 event pairs, 169 based on Foata normal form. 23/609 useless extension candidates. Maximal degree in co-relation 1829. Up to 455 conditions per place. [2023-01-28 11:54:45,102 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 34 selfloop transitions, 3 changer transitions 30/67 dead transitions. [2023-01-28 11:54:45,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 579 flow [2023-01-28 11:54:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 11:54:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 11:54:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2023-01-28 11:54:45,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143534190927556 [2023-01-28 11:54:45,104 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2023-01-28 11:54:45,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2023-01-28 11:54:45,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:45,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2023-01-28 11:54:45,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 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) [2023-01-28 11:54:45,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 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) [2023-01-28 11:54:45,107 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 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) [2023-01-28 11:54:45,107 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 287 flow. Second operand 7 states and 612 transitions. [2023-01-28 11:54:45,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 579 flow [2023-01-28 11:54:45,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 67 transitions, 569 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-01-28 11:54:45,110 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 311 flow [2023-01-28 11:54:45,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-01-28 11:54:45,111 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 30 predicate places. [2023-01-28 11:54:45,111 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 311 flow [2023-01-28 11:54:45,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.64285714285714) internal successors, (1171), 14 states have internal predecessors, (1171), 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) [2023-01-28 11:54:45,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:45,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:45,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:45,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:45,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:45,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash 927014978, now seen corresponding path program 5 times [2023-01-28 11:54:45,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:45,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361251654] [2023-01-28 11:54:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:45,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:45,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:45,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361251654] [2023-01-28 11:54:45,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361251654] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:45,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591957937] [2023-01-28 11:54:45,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:54:45,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:45,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:45,613 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) [2023-01-28 11:54:45,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 11:54:45,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:54:45,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 11:54:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:45,839 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:54:45,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-28 11:54:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:54:45,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:45,881 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:54:45,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-01-28 11:54:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591957937] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:45,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:45,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2023-01-28 11:54:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900005914] [2023-01-28 11:54:45,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:45,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 11:54:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 11:54:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-01-28 11:54:45,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-01-28 11:54:45,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 311 flow. Second operand has 17 states, 17 states have (on average 77.70588235294117) internal successors, (1321), 17 states have internal predecessors, (1321), 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) [2023-01-28 11:54:45,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:45,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-01-28 11:54:45,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:46,376 INFO L130 PetriNetUnfolder]: 350/661 cut-off events. [2023-01-28 11:54:46,376 INFO L131 PetriNetUnfolder]: For 1370/1370 co-relation queries the response was YES. [2023-01-28 11:54:46,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 661 events. 350/661 cut-off events. For 1370/1370 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3207 event pairs, 30 based on Foata normal form. 5/666 useless extension candidates. Maximal degree in co-relation 2614. Up to 422 conditions per place. [2023-01-28 11:54:46,379 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 69 selfloop transitions, 29 changer transitions 51/149 dead transitions. [2023-01-28 11:54:46,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 149 transitions, 1101 flow [2023-01-28 11:54:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 11:54:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 11:54:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1495 transitions. [2023-01-28 11:54:46,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936282253817799 [2023-01-28 11:54:46,382 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1495 transitions. [2023-01-28 11:54:46,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1495 transitions. [2023-01-28 11:54:46,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:46,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1495 transitions. [2023-01-28 11:54:46,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 83.05555555555556) internal successors, (1495), 18 states have internal predecessors, (1495), 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) [2023-01-28 11:54:46,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 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) [2023-01-28 11:54:46,389 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 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) [2023-01-28 11:54:46,389 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 311 flow. Second operand 18 states and 1495 transitions. [2023-01-28 11:54:46,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 149 transitions, 1101 flow [2023-01-28 11:54:46,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 149 transitions, 1071 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-01-28 11:54:46,394 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 486 flow [2023-01-28 11:54:46,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=486, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-01-28 11:54:46,395 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2023-01-28 11:54:46,395 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 486 flow [2023-01-28 11:54:46,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.70588235294117) internal successors, (1321), 17 states have internal predecessors, (1321), 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) [2023-01-28 11:54:46,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:46,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:46,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 11:54:46,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:46,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:46,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1904152626, now seen corresponding path program 6 times [2023-01-28 11:54:46,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:46,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716831825] [2023-01-28 11:54:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:46,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:46,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:46,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716831825] [2023-01-28 11:54:46,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716831825] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:46,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815799351] [2023-01-28 11:54:46,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:54:46,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:46,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:46,883 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) [2023-01-28 11:54:46,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 11:54:46,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 11:54:46,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 11:54:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:47,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:54:47,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 11:54:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:47,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:54:47,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-01-28 11:54:47,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-28 11:54:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815799351] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:47,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 11:54:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831726220] [2023-01-28 11:54:47,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:47,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:54:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:54:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=359, Unknown=2, NotChecked=0, Total=420 [2023-01-28 11:54:47,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-01-28 11:54:47,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 486 flow. Second operand has 21 states, 21 states have (on average 78.14285714285714) internal successors, (1641), 21 states have internal predecessors, (1641), 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) [2023-01-28 11:54:47,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:47,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-01-28 11:54:47,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:47,604 INFO L130 PetriNetUnfolder]: 366/690 cut-off events. [2023-01-28 11:54:47,604 INFO L131 PetriNetUnfolder]: For 1941/1941 co-relation queries the response was YES. [2023-01-28 11:54:47,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2932 conditions, 690 events. 366/690 cut-off events. For 1941/1941 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3360 event pairs, 32 based on Foata normal form. 1/691 useless extension candidates. Maximal degree in co-relation 2894. Up to 440 conditions per place. [2023-01-28 11:54:47,607 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 51 selfloop transitions, 28 changer transitions 30/109 dead transitions. [2023-01-28 11:54:47,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 946 flow [2023-01-28 11:54:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 11:54:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 11:54:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 926 transitions. [2023-01-28 11:54:47,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3989659629470056 [2023-01-28 11:54:47,610 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 926 transitions. [2023-01-28 11:54:47,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 926 transitions. [2023-01-28 11:54:47,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:47,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 926 transitions. [2023-01-28 11:54:47,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.18181818181819) internal successors, (926), 11 states have internal predecessors, (926), 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) [2023-01-28 11:54:47,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 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) [2023-01-28 11:54:47,614 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 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) [2023-01-28 11:54:47,615 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 486 flow. Second operand 11 states and 926 transitions. [2023-01-28 11:54:47,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 946 flow [2023-01-28 11:54:47,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 843 flow, removed 31 selfloop flow, removed 7 redundant places. [2023-01-28 11:54:47,621 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 461 flow [2023-01-28 11:54:47,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=461, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-01-28 11:54:47,621 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 49 predicate places. [2023-01-28 11:54:47,622 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 461 flow [2023-01-28 11:54:47,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 78.14285714285714) internal successors, (1641), 21 states have internal predecessors, (1641), 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) [2023-01-28 11:54:47,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:47,622 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:47,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 11:54:47,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:47,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:47,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1205721493, now seen corresponding path program 7 times [2023-01-28 11:54:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731357275] [2023-01-28 11:54:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:47,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:47,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:47,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731357275] [2023-01-28 11:54:47,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731357275] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:47,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200327404] [2023-01-28 11:54:47,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:54:47,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:47,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:47,892 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) [2023-01-28 11:54:47,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 11:54:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 11:54:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:47,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:48,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200327404] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:48,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:48,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-01-28 11:54:48,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748048454] [2023-01-28 11:54:48,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:48,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 11:54:48,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 11:54:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 11:54:48,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-28 11:54:48,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 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) [2023-01-28 11:54:48,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:48,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-28 11:54:48,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:48,148 INFO L130 PetriNetUnfolder]: 740/1387 cut-off events. [2023-01-28 11:54:48,148 INFO L131 PetriNetUnfolder]: For 4310/4310 co-relation queries the response was YES. [2023-01-28 11:54:48,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5540 conditions, 1387 events. 740/1387 cut-off events. For 4310/4310 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7836 event pairs, 152 based on Foata normal form. 18/1405 useless extension candidates. Maximal degree in co-relation 5504. Up to 886 conditions per place. [2023-01-28 11:54:48,154 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 58 selfloop transitions, 39 changer transitions 0/97 dead transitions. [2023-01-28 11:54:48,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 97 transitions, 1074 flow [2023-01-28 11:54:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:54:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:54:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-01-28 11:54:48,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500473933649289 [2023-01-28 11:54:48,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-01-28 11:54:48,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-01-28 11:54:48,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:48,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-01-28 11:54:48,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 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) [2023-01-28 11:54:48,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:48,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:48,157 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 461 flow. Second operand 5 states and 528 transitions. [2023-01-28 11:54:48,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 97 transitions, 1074 flow [2023-01-28 11:54:48,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 931 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-28 11:54:48,165 INFO L231 Difference]: Finished difference. Result has 62 places, 72 transitions, 731 flow [2023-01-28 11:54:48,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=731, PETRI_PLACES=62, PETRI_TRANSITIONS=72} [2023-01-28 11:54:48,165 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 43 predicate places. [2023-01-28 11:54:48,165 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 72 transitions, 731 flow [2023-01-28 11:54:48,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 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) [2023-01-28 11:54:48,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:48,165 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:48,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:48,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:48,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1050742924, now seen corresponding path program 8 times [2023-01-28 11:54:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:48,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536891998] [2023-01-28 11:54:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:54:48,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:48,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536891998] [2023-01-28 11:54:48,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536891998] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:48,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465280265] [2023-01-28 11:54:48,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:54:48,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:48,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:54:48,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 11:54:48,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:54:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:48,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:54:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:54:48,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:54:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465280265] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:48,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:48,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 11:54:48,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795259110] [2023-01-28 11:54:48,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:48,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:54:48,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:48,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:54:48,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:54:48,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-28 11:54:48,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 72 transitions, 731 flow. Second operand has 20 states, 20 states have (on average 83.15) internal successors, (1663), 20 states have internal predecessors, (1663), 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) [2023-01-28 11:54:48,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:48,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-28 11:54:48,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:49,077 INFO L130 PetriNetUnfolder]: 1253/2411 cut-off events. [2023-01-28 11:54:49,077 INFO L131 PetriNetUnfolder]: For 5911/5911 co-relation queries the response was YES. [2023-01-28 11:54:49,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9781 conditions, 2411 events. 1253/2411 cut-off events. For 5911/5911 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15956 event pairs, 660 based on Foata normal form. 72/2483 useless extension candidates. Maximal degree in co-relation 8879. Up to 1555 conditions per place. [2023-01-28 11:54:49,085 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 69 selfloop transitions, 4 changer transitions 65/138 dead transitions. [2023-01-28 11:54:49,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 138 transitions, 1591 flow [2023-01-28 11:54:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:54:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:54:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 694 transitions. [2023-01-28 11:54:49,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41113744075829384 [2023-01-28 11:54:49,087 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 694 transitions. [2023-01-28 11:54:49,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 694 transitions. [2023-01-28 11:54:49,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:49,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 694 transitions. [2023-01-28 11:54:49,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.75) internal successors, (694), 8 states have internal predecessors, (694), 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) [2023-01-28 11:54:49,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 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) [2023-01-28 11:54:49,092 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 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) [2023-01-28 11:54:49,092 INFO L175 Difference]: Start difference. First operand has 62 places, 72 transitions, 731 flow. Second operand 8 states and 694 transitions. [2023-01-28 11:54:49,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 138 transitions, 1591 flow [2023-01-28 11:54:49,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 138 transitions, 1496 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-01-28 11:54:49,114 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 771 flow [2023-01-28 11:54:49,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=771, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-01-28 11:54:49,115 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 52 predicate places. [2023-01-28 11:54:49,116 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 771 flow [2023-01-28 11:54:49,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 83.15) internal successors, (1663), 20 states have internal predecessors, (1663), 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) [2023-01-28 11:54:49,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:49,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:49,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:49,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 11:54:49,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:49,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1444760854, now seen corresponding path program 9 times [2023-01-28 11:54:49,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:49,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718684853] [2023-01-28 11:54:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:49,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:54:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:49,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718684853] [2023-01-28 11:54:49,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718684853] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:49,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246112582] [2023-01-28 11:54:49,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:54:49,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:49,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:54:49,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 11:54:49,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:54:49,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:49,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 11:54:49,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:50,241 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:54:50,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:54:50,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 11:54:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:50,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:50,332 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:54:50,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-01-28 11:54:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:54:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246112582] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:50,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:50,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-01-28 11:54:50,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768594435] [2023-01-28 11:54:50,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:50,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 11:54:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 11:54:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-01-28 11:54:50,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-01-28 11:54:50,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 771 flow. Second operand has 29 states, 29 states have (on average 69.89655172413794) internal successors, (2027), 29 states have internal predecessors, (2027), 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) [2023-01-28 11:54:50,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:50,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-01-28 11:54:50,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:53,903 INFO L130 PetriNetUnfolder]: 2715/5029 cut-off events. [2023-01-28 11:54:53,903 INFO L131 PetriNetUnfolder]: For 13157/13157 co-relation queries the response was YES. [2023-01-28 11:54:53,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20300 conditions, 5029 events. 2715/5029 cut-off events. For 13157/13157 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 36421 event pairs, 120 based on Foata normal form. 34/5063 useless extension candidates. Maximal degree in co-relation 20255. Up to 3187 conditions per place. [2023-01-28 11:54:53,925 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 313 selfloop transitions, 234 changer transitions 292/839 dead transitions. [2023-01-28 11:54:53,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 839 transitions, 6745 flow [2023-01-28 11:54:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-01-28 11:54:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-01-28 11:54:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 7093 transitions. [2023-01-28 11:54:53,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36146358864597666 [2023-01-28 11:54:53,935 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 7093 transitions. [2023-01-28 11:54:53,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 7093 transitions. [2023-01-28 11:54:53,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:53,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 7093 transitions. [2023-01-28 11:54:53,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 76.26881720430107) internal successors, (7093), 93 states have internal predecessors, (7093), 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) [2023-01-28 11:54:53,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 211.0) internal successors, (19834), 94 states have internal predecessors, (19834), 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) [2023-01-28 11:54:53,974 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 211.0) internal successors, (19834), 94 states have internal predecessors, (19834), 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) [2023-01-28 11:54:53,974 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 771 flow. Second operand 93 states and 7093 transitions. [2023-01-28 11:54:53,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 839 transitions, 6745 flow [2023-01-28 11:54:54,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 839 transitions, 6363 flow, removed 188 selfloop flow, removed 6 redundant places. [2023-01-28 11:54:54,023 INFO L231 Difference]: Finished difference. Result has 194 places, 255 transitions, 3302 flow [2023-01-28 11:54:54,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3302, PETRI_PLACES=194, PETRI_TRANSITIONS=255} [2023-01-28 11:54:54,024 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 175 predicate places. [2023-01-28 11:54:54,024 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 255 transitions, 3302 flow [2023-01-28 11:54:54,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.89655172413794) internal successors, (2027), 29 states have internal predecessors, (2027), 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) [2023-01-28 11:54:54,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:54,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:54,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:54,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:54,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:54,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1952496242, now seen corresponding path program 10 times [2023-01-28 11:54:54,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:54,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886078421] [2023-01-28 11:54:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:54,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:54:54,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886078421] [2023-01-28 11:54:54,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886078421] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823130122] [2023-01-28 11:54:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:54:54,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:54,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:54,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:54:54,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 11:54:54,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:54:54,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:54,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 11:54:54,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:54,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:54:54,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 11:54:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:54:54,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:55,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:54:55,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-01-28 11:54:55,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-28 11:54:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:54:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823130122] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:55,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:55,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-01-28 11:54:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197462285] [2023-01-28 11:54:55,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:55,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 11:54:55,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 11:54:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=786, Unknown=3, NotChecked=0, Total=870 [2023-01-28 11:54:55,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 211 [2023-01-28 11:54:55,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 255 transitions, 3302 flow. Second operand has 30 states, 30 states have (on average 72.76666666666667) internal successors, (2183), 30 states have internal predecessors, (2183), 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) [2023-01-28 11:54:55,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:55,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 211 [2023-01-28 11:54:55,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:56,495 INFO L130 PetriNetUnfolder]: 3205/5922 cut-off events. [2023-01-28 11:54:56,495 INFO L131 PetriNetUnfolder]: For 127260/127260 co-relation queries the response was YES. [2023-01-28 11:54:56,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33700 conditions, 5922 events. 3205/5922 cut-off events. For 127260/127260 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 43220 event pairs, 386 based on Foata normal form. 9/5931 useless extension candidates. Maximal degree in co-relation 32835. Up to 3745 conditions per place. [2023-01-28 11:54:56,531 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 136 selfloop transitions, 213 changer transitions 44/393 dead transitions. [2023-01-28 11:54:56,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 393 transitions, 5395 flow [2023-01-28 11:54:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 11:54:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 11:54:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1405 transitions. [2023-01-28 11:54:56,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699315429173249 [2023-01-28 11:54:56,533 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1405 transitions. [2023-01-28 11:54:56,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1405 transitions. [2023-01-28 11:54:56,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:56,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1405 transitions. [2023-01-28 11:54:56,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.05555555555556) internal successors, (1405), 18 states have internal predecessors, (1405), 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) [2023-01-28 11:54:56,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 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) [2023-01-28 11:54:56,538 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 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) [2023-01-28 11:54:56,538 INFO L175 Difference]: Start difference. First operand has 194 places, 255 transitions, 3302 flow. Second operand 18 states and 1405 transitions. [2023-01-28 11:54:56,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 393 transitions, 5395 flow [2023-01-28 11:54:57,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 393 transitions, 4736 flow, removed 269 selfloop flow, removed 7 redundant places. [2023-01-28 11:54:57,292 INFO L231 Difference]: Finished difference. Result has 207 places, 286 transitions, 3714 flow [2023-01-28 11:54:57,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3714, PETRI_PLACES=207, PETRI_TRANSITIONS=286} [2023-01-28 11:54:57,293 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 188 predicate places. [2023-01-28 11:54:57,293 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 286 transitions, 3714 flow [2023-01-28 11:54:57,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 72.76666666666667) internal successors, (2183), 30 states have internal predecessors, (2183), 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) [2023-01-28 11:54:57,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:57,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:57,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:57,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 11:54:57,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:57,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 397356547, now seen corresponding path program 11 times [2023-01-28 11:54:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642415347] [2023-01-28 11:54:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:54:57,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:57,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642415347] [2023-01-28 11:54:57,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642415347] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:57,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519518038] [2023-01-28 11:54:57,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:54:57,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:57,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:57,567 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:54:57,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 11:54:57,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:54:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:54:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:54:57,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:54:57,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519518038] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:57,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:57,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-01-28 11:54:57,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752223149] [2023-01-28 11:54:57,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:57,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 11:54:57,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:57,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 11:54:57,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 11:54:57,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-28 11:54:57,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 286 transitions, 3714 flow. Second operand has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 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) [2023-01-28 11:54:57,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:57,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-28 11:54:57,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:59,186 INFO L130 PetriNetUnfolder]: 6229/11496 cut-off events. [2023-01-28 11:54:59,186 INFO L131 PetriNetUnfolder]: For 226509/226509 co-relation queries the response was YES. [2023-01-28 11:54:59,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69993 conditions, 11496 events. 6229/11496 cut-off events. For 226509/226509 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 93311 event pairs, 1300 based on Foata normal form. 72/11568 useless extension candidates. Maximal degree in co-relation 69912. Up to 7255 conditions per place. [2023-01-28 11:54:59,250 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 214 selfloop transitions, 323 changer transitions 0/537 dead transitions. [2023-01-28 11:54:59,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 537 transitions, 8118 flow [2023-01-28 11:54:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:54:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:54:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-01-28 11:54:59,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015797788309637 [2023-01-28 11:54:59,251 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-01-28 11:54:59,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-01-28 11:54:59,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:59,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-01-28 11:54:59,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 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) [2023-01-28 11:54:59,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 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) [2023-01-28 11:54:59,253 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 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) [2023-01-28 11:54:59,253 INFO L175 Difference]: Start difference. First operand has 207 places, 286 transitions, 3714 flow. Second operand 6 states and 635 transitions. [2023-01-28 11:54:59,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 537 transitions, 8118 flow [2023-01-28 11:54:59,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 537 transitions, 7638 flow, removed 71 selfloop flow, removed 10 redundant places. [2023-01-28 11:54:59,680 INFO L231 Difference]: Finished difference. Result has 206 places, 503 transitions, 7748 flow [2023-01-28 11:54:59,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=3362, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7748, PETRI_PLACES=206, PETRI_TRANSITIONS=503} [2023-01-28 11:54:59,681 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 187 predicate places. [2023-01-28 11:54:59,681 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 503 transitions, 7748 flow [2023-01-28 11:54:59,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 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) [2023-01-28 11:54:59,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:59,681 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:59,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:59,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 11:54:59,882 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:54:59,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash 918217482, now seen corresponding path program 12 times [2023-01-28 11:54:59,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:59,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167960953] [2023-01-28 11:54:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:59,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:55:00,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167960953] [2023-01-28 11:55:00,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167960953] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671110177] [2023-01-28 11:55:00,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:55:00,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:00,022 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:00,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 11:55:00,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:55:00,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:00,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 11:55:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:55:00,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:55:00,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671110177] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:00,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:00,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 11:55:00,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159950813] [2023-01-28 11:55:00,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:00,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 11:55:00,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 11:55:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2023-01-28 11:55:00,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-28 11:55:00,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 503 transitions, 7748 flow. Second operand has 26 states, 26 states have (on average 82.96153846153847) internal successors, (2157), 26 states have internal predecessors, (2157), 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) [2023-01-28 11:55:00,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:00,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-28 11:55:00,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:02,105 INFO L130 PetriNetUnfolder]: 4039/7721 cut-off events. [2023-01-28 11:55:02,105 INFO L131 PetriNetUnfolder]: For 168706/168706 co-relation queries the response was YES. [2023-01-28 11:55:02,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48867 conditions, 7721 events. 4039/7721 cut-off events. For 168706/168706 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 62815 event pairs, 1847 based on Foata normal form. 324/8045 useless extension candidates. Maximal degree in co-relation 48783. Up to 4951 conditions per place. [2023-01-28 11:55:02,140 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 154 selfloop transitions, 5 changer transitions 210/369 dead transitions. [2023-01-28 11:55:02,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 369 transitions, 6546 flow [2023-01-28 11:55:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 11:55:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 11:55:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 865 transitions. [2023-01-28 11:55:02,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099526066350711 [2023-01-28 11:55:02,141 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 865 transitions. [2023-01-28 11:55:02,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 865 transitions. [2023-01-28 11:55:02,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:02,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 865 transitions. [2023-01-28 11:55:02,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.5) internal successors, (865), 10 states have internal predecessors, (865), 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) [2023-01-28 11:55:02,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 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) [2023-01-28 11:55:02,144 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 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) [2023-01-28 11:55:02,144 INFO L175 Difference]: Start difference. First operand has 206 places, 503 transitions, 7748 flow. Second operand 10 states and 865 transitions. [2023-01-28 11:55:02,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 369 transitions, 6546 flow [2023-01-28 11:55:02,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 369 transitions, 5991 flow, removed 178 selfloop flow, removed 13 redundant places. [2023-01-28 11:55:02,986 INFO L231 Difference]: Finished difference. Result has 194 places, 159 transitions, 2447 flow [2023-01-28 11:55:02,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2447, PETRI_PLACES=194, PETRI_TRANSITIONS=159} [2023-01-28 11:55:02,987 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 175 predicate places. [2023-01-28 11:55:02,987 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 159 transitions, 2447 flow [2023-01-28 11:55:02,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 82.96153846153847) internal successors, (2157), 26 states have internal predecessors, (2157), 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) [2023-01-28 11:55:02,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:02,987 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:02,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 11:55:03,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 11:55:03,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:03,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash -657168656, now seen corresponding path program 13 times [2023-01-28 11:55:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:03,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677445081] [2023-01-28 11:55:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:55:03,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:03,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677445081] [2023-01-28 11:55:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677445081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:03,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213782181] [2023-01-28 11:55:03,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:55:03,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:03,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:03,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:03,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 11:55:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:55:03,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:55:03,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:04,055 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:55:04,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-01-28 11:55:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:55:04,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213782181] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:04,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:04,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-28 11:55:04,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581770234] [2023-01-28 11:55:04,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:04,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:55:04,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:04,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:55:04,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:55:04,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-01-28 11:55:04,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 159 transitions, 2447 flow. Second operand has 33 states, 33 states have (on average 76.81818181818181) internal successors, (2535), 33 states have internal predecessors, (2535), 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) [2023-01-28 11:55:04,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:04,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-01-28 11:55:04,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:06,321 INFO L130 PetriNetUnfolder]: 2480/4557 cut-off events. [2023-01-28 11:55:06,321 INFO L131 PetriNetUnfolder]: For 91246/91246 co-relation queries the response was YES. [2023-01-28 11:55:06,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28854 conditions, 4557 events. 2480/4557 cut-off events. For 91246/91246 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31692 event pairs, 80 based on Foata normal form. 9/4566 useless extension candidates. Maximal degree in co-relation 28779. Up to 2874 conditions per place. [2023-01-28 11:55:06,347 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 175 selfloop transitions, 188 changer transitions 163/526 dead transitions. [2023-01-28 11:55:06,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 526 transitions, 6697 flow [2023-01-28 11:55:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-01-28 11:55:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-01-28 11:55:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4394 transitions. [2023-01-28 11:55:06,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39291782169364214 [2023-01-28 11:55:06,353 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4394 transitions. [2023-01-28 11:55:06,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4394 transitions. [2023-01-28 11:55:06,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:06,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4394 transitions. [2023-01-28 11:55:06,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 82.90566037735849) internal successors, (4394), 53 states have internal predecessors, (4394), 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) [2023-01-28 11:55:06,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 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) [2023-01-28 11:55:06,367 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 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) [2023-01-28 11:55:06,367 INFO L175 Difference]: Start difference. First operand has 194 places, 159 transitions, 2447 flow. Second operand 53 states and 4394 transitions. [2023-01-28 11:55:06,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 526 transitions, 6697 flow [2023-01-28 11:55:06,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 526 transitions, 5016 flow, removed 755 selfloop flow, removed 33 redundant places. [2023-01-28 11:55:06,778 INFO L231 Difference]: Finished difference. Result has 162 places, 207 transitions, 3320 flow [2023-01-28 11:55:06,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=3320, PETRI_PLACES=162, PETRI_TRANSITIONS=207} [2023-01-28 11:55:06,779 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 143 predicate places. [2023-01-28 11:55:06,779 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 207 transitions, 3320 flow [2023-01-28 11:55:06,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.81818181818181) internal successors, (2535), 33 states have internal predecessors, (2535), 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) [2023-01-28 11:55:06,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:06,780 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:06,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 11:55:06,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 11:55:06,984 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:06,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash 779977742, now seen corresponding path program 14 times [2023-01-28 11:55:06,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:06,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122424657] [2023-01-28 11:55:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:06,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:55:07,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:07,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122424657] [2023-01-28 11:55:07,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122424657] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:07,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111953260] [2023-01-28 11:55:07,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:55:07,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:07,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:07,461 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:07,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 11:55:07,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:55:07,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 11:55:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:55:07,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 11:55:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:55:07,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:07,997 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_539 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_539) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-01-28 11:55:08,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:55:08,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-01-28 11:55:08,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-28 11:55:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 4 not checked. [2023-01-28 11:55:08,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111953260] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:08,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:08,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-01-28 11:55:08,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006586268] [2023-01-28 11:55:08,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:08,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 11:55:08,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 11:55:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1161, Unknown=1, NotChecked=68, Total=1332 [2023-01-28 11:55:08,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 211 [2023-01-28 11:55:08,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 207 transitions, 3320 flow. Second operand has 37 states, 37 states have (on average 72.62162162162163) internal successors, (2687), 37 states have internal predecessors, (2687), 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) [2023-01-28 11:55:08,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:08,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 211 [2023-01-28 11:55:08,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:09,813 INFO L130 PetriNetUnfolder]: 2496/4586 cut-off events. [2023-01-28 11:55:09,814 INFO L131 PetriNetUnfolder]: For 23232/23232 co-relation queries the response was YES. [2023-01-28 11:55:09,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21747 conditions, 4586 events. 2496/4586 cut-off events. For 23232/23232 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31832 event pairs, 92 based on Foata normal form. 1/4587 useless extension candidates. Maximal degree in co-relation 21691. Up to 2892 conditions per place. [2023-01-28 11:55:09,831 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 77 selfloop transitions, 188 changer transitions 58/323 dead transitions. [2023-01-28 11:55:09,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 323 transitions, 4432 flow [2023-01-28 11:55:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 11:55:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 11:55:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1795 transitions. [2023-01-28 11:55:09,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698743045538842 [2023-01-28 11:55:09,852 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1795 transitions. [2023-01-28 11:55:09,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1795 transitions. [2023-01-28 11:55:09,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:09,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1795 transitions. [2023-01-28 11:55:09,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 78.04347826086956) internal successors, (1795), 23 states have internal predecessors, (1795), 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) [2023-01-28 11:55:09,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 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) [2023-01-28 11:55:09,862 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 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) [2023-01-28 11:55:09,862 INFO L175 Difference]: Start difference. First operand has 162 places, 207 transitions, 3320 flow. Second operand 23 states and 1795 transitions. [2023-01-28 11:55:09,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 323 transitions, 4432 flow [2023-01-28 11:55:09,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 323 transitions, 4005 flow, removed 42 selfloop flow, removed 19 redundant places. [2023-01-28 11:55:09,941 INFO L231 Difference]: Finished difference. Result has 166 places, 208 transitions, 3296 flow [2023-01-28 11:55:09,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3296, PETRI_PLACES=166, PETRI_TRANSITIONS=208} [2023-01-28 11:55:09,942 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 147 predicate places. [2023-01-28 11:55:09,943 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 208 transitions, 3296 flow [2023-01-28 11:55:09,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 72.62162162162163) internal successors, (2687), 37 states have internal predecessors, (2687), 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) [2023-01-28 11:55:09,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:09,943 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:09,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-28 11:55:10,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:10,148 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:10,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:10,148 INFO L85 PathProgramCache]: Analyzing trace with hash -25952981, now seen corresponding path program 15 times [2023-01-28 11:55:10,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:10,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557941665] [2023-01-28 11:55:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:10,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:55:10,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:10,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557941665] [2023-01-28 11:55:10,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557941665] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:10,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204392755] [2023-01-28 11:55:10,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:55:10,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:10,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:10,225 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:10,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 11:55:10,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:55:10,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 11:55:10,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:10,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 11:55:10,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:55:10,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:55:10,817 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-01-28 11:55:10,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 16 [2023-01-28 11:55:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:55:10,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:11,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:55:11,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-01-28 11:55:11,228 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2023-01-28 11:55:11,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 712 treesize of output 639 [2023-01-28 11:55:11,245 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:55:11,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:55:11,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:55:11,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 220 [2023-01-28 11:55:11,260 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-01-28 11:55:11,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 233 treesize of output 159 [2023-01-28 11:55:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:55:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204392755] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:11,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 31 [2023-01-28 11:55:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56076577] [2023-01-28 11:55:11,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:11,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:55:11,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:11,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:55:11,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=804, Unknown=4, NotChecked=0, Total=992 [2023-01-28 11:55:11,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-01-28 11:55:11,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 208 transitions, 3296 flow. Second operand has 32 states, 32 states have (on average 63.03125) internal successors, (2017), 32 states have internal predecessors, (2017), 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) [2023-01-28 11:55:11,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:11,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-01-28 11:55:11,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:17,189 INFO L130 PetriNetUnfolder]: 9105/16697 cut-off events. [2023-01-28 11:55:17,189 INFO L131 PetriNetUnfolder]: For 103144/103144 co-relation queries the response was YES. [2023-01-28 11:55:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80135 conditions, 16697 events. 9105/16697 cut-off events. For 103144/103144 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 142067 event pairs, 744 based on Foata normal form. 53/16750 useless extension candidates. Maximal degree in co-relation 73506. Up to 10507 conditions per place. [2023-01-28 11:55:17,245 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 133 selfloop transitions, 271 changer transitions 711/1115 dead transitions. [2023-01-28 11:55:17,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1115 transitions, 15971 flow [2023-01-28 11:55:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-01-28 11:55:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-01-28 11:55:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4969 transitions. [2023-01-28 11:55:17,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32708004212743547 [2023-01-28 11:55:17,253 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4969 transitions. [2023-01-28 11:55:17,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4969 transitions. [2023-01-28 11:55:17,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:17,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4969 transitions. [2023-01-28 11:55:17,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 69.01388888888889) internal successors, (4969), 72 states have internal predecessors, (4969), 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) [2023-01-28 11:55:17,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 211.0) internal successors, (15403), 73 states have internal predecessors, (15403), 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) [2023-01-28 11:55:17,264 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 211.0) internal successors, (15403), 73 states have internal predecessors, (15403), 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) [2023-01-28 11:55:17,264 INFO L175 Difference]: Start difference. First operand has 166 places, 208 transitions, 3296 flow. Second operand 72 states and 4969 transitions. [2023-01-28 11:55:17,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1115 transitions, 15971 flow [2023-01-28 11:55:17,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1115 transitions, 14819 flow, removed 29 selfloop flow, removed 18 redundant places. [2023-01-28 11:55:17,720 INFO L231 Difference]: Finished difference. Result has 243 places, 352 transitions, 6145 flow [2023-01-28 11:55:17,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=6145, PETRI_PLACES=243, PETRI_TRANSITIONS=352} [2023-01-28 11:55:17,720 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 224 predicate places. [2023-01-28 11:55:17,720 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 352 transitions, 6145 flow [2023-01-28 11:55:17,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.03125) internal successors, (2017), 32 states have internal predecessors, (2017), 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) [2023-01-28 11:55:17,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:17,721 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:17,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 11:55:17,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 11:55:17,925 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:17,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash -58665988, now seen corresponding path program 16 times [2023-01-28 11:55:17,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:17,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372099699] [2023-01-28 11:55:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:17,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:55:18,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:18,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372099699] [2023-01-28 11:55:18,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372099699] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:18,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798820619] [2023-01-28 11:55:18,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:55:18,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:18,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:18,088 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:18,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 11:55:18,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:55:18,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:18,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 11:55:18,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:55:18,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:55:18,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798820619] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:18,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:18,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 11:55:18,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005350523] [2023-01-28 11:55:18,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:55:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:55:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2023-01-28 11:55:18,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-28 11:55:18,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 352 transitions, 6145 flow. Second operand has 32 states, 32 states have (on average 82.625) internal successors, (2644), 32 states have internal predecessors, (2644), 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) [2023-01-28 11:55:18,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:18,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-28 11:55:18,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:20,242 INFO L130 PetriNetUnfolder]: 5113/9531 cut-off events. [2023-01-28 11:55:20,242 INFO L131 PetriNetUnfolder]: For 48431/48431 co-relation queries the response was YES. [2023-01-28 11:55:20,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46322 conditions, 9531 events. 5113/9531 cut-off events. For 48431/48431 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 77267 event pairs, 3154 based on Foata normal form. 121/9652 useless extension candidates. Maximal degree in co-relation 46043. Up to 8306 conditions per place. [2023-01-28 11:55:20,293 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 335 selfloop transitions, 6 changer transitions 147/488 dead transitions. [2023-01-28 11:55:20,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 488 transitions, 8076 flow [2023-01-28 11:55:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 11:55:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 11:55:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1839 transitions. [2023-01-28 11:55:20,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150304671631686 [2023-01-28 11:55:20,295 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1839 transitions. [2023-01-28 11:55:20,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1839 transitions. [2023-01-28 11:55:20,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:20,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1839 transitions. [2023-01-28 11:55:20,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.57142857142857) internal successors, (1839), 21 states have internal predecessors, (1839), 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) [2023-01-28 11:55:20,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 211.0) internal successors, (4642), 22 states have internal predecessors, (4642), 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) [2023-01-28 11:55:20,299 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 211.0) internal successors, (4642), 22 states have internal predecessors, (4642), 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) [2023-01-28 11:55:20,299 INFO L175 Difference]: Start difference. First operand has 243 places, 352 transitions, 6145 flow. Second operand 21 states and 1839 transitions. [2023-01-28 11:55:20,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 488 transitions, 8076 flow [2023-01-28 11:55:20,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 488 transitions, 7542 flow, removed 249 selfloop flow, removed 25 redundant places. [2023-01-28 11:55:20,602 INFO L231 Difference]: Finished difference. Result has 201 places, 341 transitions, 5626 flow [2023-01-28 11:55:20,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5626, PETRI_PLACES=201, PETRI_TRANSITIONS=341} [2023-01-28 11:55:20,603 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 182 predicate places. [2023-01-28 11:55:20,603 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 341 transitions, 5626 flow [2023-01-28 11:55:20,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 82.625) internal successors, (2644), 32 states have internal predecessors, (2644), 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) [2023-01-28 11:55:20,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:20,603 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:20,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 11:55:20,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:20,803 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:20,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1406109756, now seen corresponding path program 17 times [2023-01-28 11:55:20,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:20,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881832722] [2023-01-28 11:55:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:20,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:55:21,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:21,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881832722] [2023-01-28 11:55:21,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881832722] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:21,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142785992] [2023-01-28 11:55:21,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:55:21,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:21,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:21,280 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:21,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 11:55:21,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 11:55:21,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:21,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-28 11:55:21,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:21,813 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:55:21,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-28 11:55:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:55:21,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:21,963 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:55:21,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-01-28 11:55:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:55:22,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142785992] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:22,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:22,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 11] total 41 [2023-01-28 11:55:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518118656] [2023-01-28 11:55:22,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:22,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 11:55:22,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:22,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 11:55:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2023-01-28 11:55:22,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-01-28 11:55:22,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 341 transitions, 5626 flow. Second operand has 43 states, 43 states have (on average 76.65116279069767) internal successors, (3296), 43 states have internal predecessors, (3296), 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) [2023-01-28 11:55:22,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:22,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-01-28 11:55:22,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:26,285 INFO L130 PetriNetUnfolder]: 5660/10339 cut-off events. [2023-01-28 11:55:26,285 INFO L131 PetriNetUnfolder]: For 57012/57012 co-relation queries the response was YES. [2023-01-28 11:55:26,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48416 conditions, 10339 events. 5660/10339 cut-off events. For 57012/57012 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 81041 event pairs, 210 based on Foata normal form. 11/10350 useless extension candidates. Maximal degree in co-relation 48342. Up to 6482 conditions per place. [2023-01-28 11:55:26,331 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 249 selfloop transitions, 409 changer transitions 240/898 dead transitions. [2023-01-28 11:55:26,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 898 transitions, 10667 flow [2023-01-28 11:55:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-01-28 11:55:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-01-28 11:55:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6305 transitions. [2023-01-28 11:55:26,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931778498378648 [2023-01-28 11:55:26,339 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6305 transitions. [2023-01-28 11:55:26,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6305 transitions. [2023-01-28 11:55:26,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:26,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6305 transitions. [2023-01-28 11:55:26,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 82.96052631578948) internal successors, (6305), 76 states have internal predecessors, (6305), 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) [2023-01-28 11:55:26,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 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) [2023-01-28 11:55:26,357 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 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) [2023-01-28 11:55:26,357 INFO L175 Difference]: Start difference. First operand has 201 places, 341 transitions, 5626 flow. Second operand 76 states and 6305 transitions. [2023-01-28 11:55:26,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 898 transitions, 10667 flow [2023-01-28 11:55:26,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 898 transitions, 10464 flow, removed 81 selfloop flow, removed 25 redundant places. [2023-01-28 11:55:26,643 INFO L231 Difference]: Finished difference. Result has 243 places, 430 transitions, 8180 flow [2023-01-28 11:55:26,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=8180, PETRI_PLACES=243, PETRI_TRANSITIONS=430} [2023-01-28 11:55:26,643 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 224 predicate places. [2023-01-28 11:55:26,643 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 430 transitions, 8180 flow [2023-01-28 11:55:26,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 76.65116279069767) internal successors, (3296), 43 states have internal predecessors, (3296), 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) [2023-01-28 11:55:26,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:26,644 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:26,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 11:55:26,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:26,849 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:26,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1419600050, now seen corresponding path program 18 times [2023-01-28 11:55:26,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:26,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356242936] [2023-01-28 11:55:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:26,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:55:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356242936] [2023-01-28 11:55:27,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356242936] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59522079] [2023-01-28 11:55:27,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:55:27,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:27,383 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:27,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 11:55:27,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:55:27,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 11:55:27,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:27,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:55:27,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:55:27,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:55:27,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-01-28 11:55:30,253 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-28 11:55:30,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-01-28 11:55:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 23 refuted. 1 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:55:30,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:31,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:55:31,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-01-28 11:55:31,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:55:31,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 97 [2023-01-28 11:55:31,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:55:31,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2023-01-28 11:55:31,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-01-28 11:55:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:55:31,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59522079] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:31,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:31,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-01-28 11:55:31,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528534303] [2023-01-28 11:55:31,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:31,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 11:55:31,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 11:55:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1801, Unknown=2, NotChecked=0, Total=2070 [2023-01-28 11:55:31,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-01-28 11:55:31,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 430 transitions, 8180 flow. Second operand has 46 states, 46 states have (on average 62.5) internal successors, (2875), 46 states have internal predecessors, (2875), 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) [2023-01-28 11:55:31,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:31,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-01-28 11:55:31,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:37,722 INFO L130 PetriNetUnfolder]: 8379/15599 cut-off events. [2023-01-28 11:55:37,723 INFO L131 PetriNetUnfolder]: For 102524/102524 co-relation queries the response was YES. [2023-01-28 11:55:37,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77970 conditions, 15599 events. 8379/15599 cut-off events. For 102524/102524 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 132880 event pairs, 366 based on Foata normal form. 283/15882 useless extension candidates. Maximal degree in co-relation 77268. Up to 9743 conditions per place. [2023-01-28 11:55:37,790 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 63 selfloop transitions, 410 changer transitions 451/924 dead transitions. [2023-01-28 11:55:37,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 924 transitions, 15555 flow [2023-01-28 11:55:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 11:55:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 11:55:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3014 transitions. [2023-01-28 11:55:37,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3246445497630332 [2023-01-28 11:55:37,793 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3014 transitions. [2023-01-28 11:55:37,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3014 transitions. [2023-01-28 11:55:37,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:37,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3014 transitions. [2023-01-28 11:55:37,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 68.5) internal successors, (3014), 44 states have internal predecessors, (3014), 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) [2023-01-28 11:55:37,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 211.0) internal successors, (9495), 45 states have internal predecessors, (9495), 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) [2023-01-28 11:55:37,800 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 211.0) internal successors, (9495), 45 states have internal predecessors, (9495), 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) [2023-01-28 11:55:37,800 INFO L175 Difference]: Start difference. First operand has 243 places, 430 transitions, 8180 flow. Second operand 44 states and 3014 transitions. [2023-01-28 11:55:37,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 924 transitions, 15555 flow [2023-01-28 11:55:38,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 924 transitions, 14003 flow, removed 80 selfloop flow, removed 30 redundant places. [2023-01-28 11:55:38,577 INFO L231 Difference]: Finished difference. Result has 260 places, 432 transitions, 8184 flow [2023-01-28 11:55:38,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=7305, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8184, PETRI_PLACES=260, PETRI_TRANSITIONS=432} [2023-01-28 11:55:38,578 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 241 predicate places. [2023-01-28 11:55:38,578 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 432 transitions, 8184 flow [2023-01-28 11:55:38,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 62.5) internal successors, (2875), 46 states have internal predecessors, (2875), 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) [2023-01-28 11:55:38,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:38,578 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:38,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 11:55:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:38,784 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:38,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash -46687399, now seen corresponding path program 19 times [2023-01-28 11:55:38,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:38,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398227347] [2023-01-28 11:55:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:38,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:55:38,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:38,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398227347] [2023-01-28 11:55:38,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398227347] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:38,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114610651] [2023-01-28 11:55:38,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:55:38,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:38,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:38,894 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:38,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 11:55:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:55:39,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:55:39,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:55:39,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114610651] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:39,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:39,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2023-01-28 11:55:39,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289127748] [2023-01-28 11:55:39,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:39,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 11:55:39,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:39,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 11:55:39,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-01-28 11:55:39,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-28 11:55:39,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 432 transitions, 8184 flow. Second operand has 9 states, 9 states have (on average 99.55555555555556) internal successors, (896), 9 states have internal predecessors, (896), 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) [2023-01-28 11:55:39,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:39,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-28 11:55:39,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:41,506 INFO L130 PetriNetUnfolder]: 9992/18215 cut-off events. [2023-01-28 11:55:41,507 INFO L131 PetriNetUnfolder]: For 163958/163958 co-relation queries the response was YES. [2023-01-28 11:55:41,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95109 conditions, 18215 events. 9992/18215 cut-off events. For 163958/163958 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 155161 event pairs, 1234 based on Foata normal form. 18/18233 useless extension candidates. Maximal degree in co-relation 95014. Up to 11386 conditions per place. [2023-01-28 11:55:41,598 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 213 selfloop transitions, 542 changer transitions 0/755 dead transitions. [2023-01-28 11:55:41,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 755 transitions, 16297 flow [2023-01-28 11:55:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:55:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:55:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 849 transitions. [2023-01-28 11:55:41,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029620853080569 [2023-01-28 11:55:41,600 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 849 transitions. [2023-01-28 11:55:41,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 849 transitions. [2023-01-28 11:55:41,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:41,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 849 transitions. [2023-01-28 11:55:41,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.125) internal successors, (849), 8 states have internal predecessors, (849), 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) [2023-01-28 11:55:41,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 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) [2023-01-28 11:55:41,602 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 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) [2023-01-28 11:55:41,602 INFO L175 Difference]: Start difference. First operand has 260 places, 432 transitions, 8184 flow. Second operand 8 states and 849 transitions. [2023-01-28 11:55:41,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 755 transitions, 16297 flow [2023-01-28 11:55:42,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 755 transitions, 15479 flow, removed 63 selfloop flow, removed 14 redundant places. [2023-01-28 11:55:42,448 INFO L231 Difference]: Finished difference. Result has 230 places, 706 transitions, 14933 flow [2023-01-28 11:55:42,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14933, PETRI_PLACES=230, PETRI_TRANSITIONS=706} [2023-01-28 11:55:42,448 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 211 predicate places. [2023-01-28 11:55:42,448 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 706 transitions, 14933 flow [2023-01-28 11:55:42,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.55555555555556) internal successors, (896), 9 states have internal predecessors, (896), 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) [2023-01-28 11:55:42,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:42,448 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:42,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 11:55:42,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:42,649 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:42,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash -426818820, now seen corresponding path program 20 times [2023-01-28 11:55:42,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:42,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722256641] [2023-01-28 11:55:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:42,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:55:43,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722256641] [2023-01-28 11:55:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722256641] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991344346] [2023-01-28 11:55:43,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:55:43,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:43,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:43,041 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:43,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 11:55:43,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:55:43,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:43,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 11:55:43,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:43,448 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:55:43,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 11:55:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:55:43,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:43,566 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:55:43,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-01-28 11:55:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-01-28 11:55:43,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991344346] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:43,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:43,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 37 [2023-01-28 11:55:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064508082] [2023-01-28 11:55:43,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 11:55:43,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 11:55:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2023-01-28 11:55:43,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 211 [2023-01-28 11:55:43,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 706 transitions, 14933 flow. Second operand has 39 states, 39 states have (on average 81.51282051282051) internal successors, (3179), 39 states have internal predecessors, (3179), 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) [2023-01-28 11:55:43,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:43,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 211 [2023-01-28 11:55:43,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:55:53,894 INFO L130 PetriNetUnfolder]: 13336/24270 cut-off events. [2023-01-28 11:55:53,895 INFO L131 PetriNetUnfolder]: For 209008/209008 co-relation queries the response was YES. [2023-01-28 11:55:53,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130619 conditions, 24270 events. 13336/24270 cut-off events. For 209008/209008 co-relation queries the response was YES. Maximal size of possible extension queue 1356. Compared 215171 event pairs, 580 based on Foata normal form. 12/24282 useless extension candidates. Maximal degree in co-relation 130550. Up to 15148 conditions per place. [2023-01-28 11:55:53,998 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 525 selfloop transitions, 967 changer transitions 653/2145 dead transitions. [2023-01-28 11:55:53,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2145 transitions, 29551 flow [2023-01-28 11:55:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-01-28 11:55:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2023-01-28 11:55:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 15616 transitions. [2023-01-28 11:55:54,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41813264786997617 [2023-01-28 11:55:54,009 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 15616 transitions. [2023-01-28 11:55:54,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 15616 transitions. [2023-01-28 11:55:54,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:55:54,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 15616 transitions. [2023-01-28 11:55:54,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 88.22598870056497) internal successors, (15616), 177 states have internal predecessors, (15616), 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) [2023-01-28 11:55:54,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 178 states, 178 states have (on average 211.0) internal successors, (37558), 178 states have internal predecessors, (37558), 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) [2023-01-28 11:55:54,043 INFO L81 ComplementDD]: Finished complementDD. Result has 178 states, 178 states have (on average 211.0) internal successors, (37558), 178 states have internal predecessors, (37558), 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) [2023-01-28 11:55:54,043 INFO L175 Difference]: Start difference. First operand has 230 places, 706 transitions, 14933 flow. Second operand 177 states and 15616 transitions. [2023-01-28 11:55:54,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2145 transitions, 29551 flow [2023-01-28 11:55:55,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 2145 transitions, 28023 flow, removed 764 selfloop flow, removed 1 redundant places. [2023-01-28 11:55:55,169 INFO L231 Difference]: Finished difference. Result has 418 places, 995 transitions, 22238 flow [2023-01-28 11:55:55,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=14053, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=22238, PETRI_PLACES=418, PETRI_TRANSITIONS=995} [2023-01-28 11:55:55,170 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 399 predicate places. [2023-01-28 11:55:55,170 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 995 transitions, 22238 flow [2023-01-28 11:55:55,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 81.51282051282051) internal successors, (3179), 39 states have internal predecessors, (3179), 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) [2023-01-28 11:55:55,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:55,170 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:55,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 11:55:55,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 11:55:55,372 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:55:55,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -496420982, now seen corresponding path program 21 times [2023-01-28 11:55:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:55,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975998608] [2023-01-28 11:55:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:55,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:55:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975998608] [2023-01-28 11:55:55,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975998608] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376155885] [2023-01-28 11:55:55,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:55:55,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:55,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:55,882 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:55:55,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 11:55:56,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 11:55:56,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:56,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 11:55:56,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:56,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:55:56,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:55:56,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:55:56,857 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-28 11:55:56,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-01-28 11:55:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:55:56,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:57,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:55:57,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-01-28 11:55:57,570 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:55:57,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 138 [2023-01-28 11:55:57,578 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-01-28 11:55:57,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 103 [2023-01-28 11:55:57,587 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-01-28 11:55:57,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 67 [2023-01-28 11:55:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:55:57,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376155885] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:57,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:57,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-01-28 11:55:57,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113667229] [2023-01-28 11:55:57,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:57,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 11:55:57,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:57,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 11:55:57,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1760, Unknown=3, NotChecked=0, Total=2070 [2023-01-28 11:55:57,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-01-28 11:55:57,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 995 transitions, 22238 flow. Second operand has 46 states, 46 states have (on average 62.54347826086956) internal successors, (2877), 46 states have internal predecessors, (2877), 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) [2023-01-28 11:55:57,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:57,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-01-28 11:55:57,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:56:30,802 INFO L130 PetriNetUnfolder]: 45991/83740 cut-off events. [2023-01-28 11:56:30,802 INFO L131 PetriNetUnfolder]: For 794013/794013 co-relation queries the response was YES. [2023-01-28 11:56:31,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477281 conditions, 83740 events. 45991/83740 cut-off events. For 794013/794013 co-relation queries the response was YES. Maximal size of possible extension queue 4160. Compared 866690 event pairs, 6737 based on Foata normal form. 2/83742 useless extension candidates. Maximal degree in co-relation 473535. Up to 52295 conditions per place. [2023-01-28 11:56:31,493 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 516 selfloop transitions, 984 changer transitions 2490/3990 dead transitions. [2023-01-28 11:56:31,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 3990 transitions, 91251 flow [2023-01-28 11:56:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-01-28 11:56:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-01-28 11:56:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 6257 transitions. [2023-01-28 11:56:31,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3258684443518567 [2023-01-28 11:56:31,497 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 6257 transitions. [2023-01-28 11:56:31,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 6257 transitions. [2023-01-28 11:56:31,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:56:31,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 6257 transitions. [2023-01-28 11:56:31,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 68.75824175824175) internal successors, (6257), 91 states have internal predecessors, (6257), 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) [2023-01-28 11:56:31,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 211.0) internal successors, (19412), 92 states have internal predecessors, (19412), 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) [2023-01-28 11:56:31,512 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 211.0) internal successors, (19412), 92 states have internal predecessors, (19412), 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) [2023-01-28 11:56:31,512 INFO L175 Difference]: Start difference. First operand has 418 places, 995 transitions, 22238 flow. Second operand 91 states and 6257 transitions. [2023-01-28 11:56:31,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 3990 transitions, 91251 flow [2023-01-28 11:56:50,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 3990 transitions, 82710 flow, removed 889 selfloop flow, removed 31 redundant places. [2023-01-28 11:56:50,647 INFO L231 Difference]: Finished difference. Result has 508 places, 1399 transitions, 33181 flow [2023-01-28 11:56:50,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=19881, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=33181, PETRI_PLACES=508, PETRI_TRANSITIONS=1399} [2023-01-28 11:56:50,648 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 489 predicate places. [2023-01-28 11:56:50,648 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 1399 transitions, 33181 flow [2023-01-28 11:56:50,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 62.54347826086956) internal successors, (2877), 46 states have internal predecessors, (2877), 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) [2023-01-28 11:56:50,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:56:50,649 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:56:50,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 11:56:50,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 11:56:50,849 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:56:50,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:56:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash 866703688, now seen corresponding path program 22 times [2023-01-28 11:56:50,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:56:50,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241662632] [2023-01-28 11:56:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:56:50,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:56:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:56:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:56:51,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:56:51,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241662632] [2023-01-28 11:56:51,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241662632] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:56:51,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192451705] [2023-01-28 11:56:51,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:56:51,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:56:51,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:56:51,378 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:56:51,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 11:56:51,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:56:51,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:56:51,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:56:51,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:56:51,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:56:51,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 11:56:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:56:51,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:56:52,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:56:52,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-01-28 11:56:52,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-28 11:56:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:56:52,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192451705] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:56:52,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:56:52,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 11:56:52,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399907675] [2023-01-28 11:56:52,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:56:52,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 11:56:52,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:56:52,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 11:56:52,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1852, Unknown=1, NotChecked=0, Total=1980 [2023-01-28 11:56:52,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-01-28 11:56:52,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1399 transitions, 33181 flow. Second operand has 45 states, 45 states have (on average 77.53333333333333) internal successors, (3489), 45 states have internal predecessors, (3489), 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) [2023-01-28 11:56:52,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:56:52,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-01-28 11:56:52,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:57:04,688 INFO L130 PetriNetUnfolder]: 18630/33935 cut-off events. [2023-01-28 11:57:04,688 INFO L131 PetriNetUnfolder]: For 402148/402148 co-relation queries the response was YES. [2023-01-28 11:57:04,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195512 conditions, 33935 events. 18630/33935 cut-off events. For 402148/402148 co-relation queries the response was YES. Maximal size of possible extension queue 1882. Compared 314395 event pairs, 841 based on Foata normal form. 1/33936 useless extension candidates. Maximal degree in co-relation 195378. Up to 21200 conditions per place. [2023-01-28 11:57:04,977 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 112 selfloop transitions, 1370 changer transitions 86/1568 dead transitions. [2023-01-28 11:57:04,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1568 transitions, 37017 flow [2023-01-28 11:57:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 11:57:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 11:57:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2278 transitions. [2023-01-28 11:57:04,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39985957521502546 [2023-01-28 11:57:04,979 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2278 transitions. [2023-01-28 11:57:04,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2278 transitions. [2023-01-28 11:57:04,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:57:04,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2278 transitions. [2023-01-28 11:57:04,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 84.37037037037037) internal successors, (2278), 27 states have internal predecessors, (2278), 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) [2023-01-28 11:57:04,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 211.0) internal successors, (5908), 28 states have internal predecessors, (5908), 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) [2023-01-28 11:57:04,983 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 211.0) internal successors, (5908), 28 states have internal predecessors, (5908), 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) [2023-01-28 11:57:04,983 INFO L175 Difference]: Start difference. First operand has 508 places, 1399 transitions, 33181 flow. Second operand 27 states and 2278 transitions. [2023-01-28 11:57:04,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1568 transitions, 37017 flow [2023-01-28 11:57:09,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1568 transitions, 35339 flow, removed 758 selfloop flow, removed 37 redundant places. [2023-01-28 11:57:09,366 INFO L231 Difference]: Finished difference. Result has 458 places, 1400 transitions, 34280 flow [2023-01-28 11:57:09,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=31503, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=34280, PETRI_PLACES=458, PETRI_TRANSITIONS=1400} [2023-01-28 11:57:09,367 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 439 predicate places. [2023-01-28 11:57:09,367 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1400 transitions, 34280 flow [2023-01-28 11:57:09,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 77.53333333333333) internal successors, (3489), 45 states have internal predecessors, (3489), 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) [2023-01-28 11:57:09,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:57:09,367 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:57:09,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 11:57:09,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:57:09,573 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:57:09,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:57:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash 632320561, now seen corresponding path program 23 times [2023-01-28 11:57:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:57:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022531884] [2023-01-28 11:57:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:57:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:57:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:57:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:57:09,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:57:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022531884] [2023-01-28 11:57:09,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022531884] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:57:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470044431] [2023-01-28 11:57:09,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:57:09,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:57:09,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:57:09,776 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:57:09,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 11:57:09,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-01-28 11:57:09,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:57:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:57:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:57:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:57:09,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:57:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:57:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470044431] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:57:10,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:57:10,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2023-01-28 11:57:10,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297992881] [2023-01-28 11:57:10,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:57:10,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 11:57:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:57:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 11:57:10,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-01-28 11:57:10,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-28 11:57:10,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1400 transitions, 34280 flow. Second operand has 10 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 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) [2023-01-28 11:57:10,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:57:10,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-28 11:57:10,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:57:26,384 INFO L130 PetriNetUnfolder]: 29076/52893 cut-off events. [2023-01-28 11:57:26,384 INFO L131 PetriNetUnfolder]: For 725910/725910 co-relation queries the response was YES. [2023-01-28 11:57:26,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310788 conditions, 52893 events. 29076/52893 cut-off events. For 725910/725910 co-relation queries the response was YES. Maximal size of possible extension queue 2908. Compared 520713 event pairs, 3244 based on Foata normal form. 18/52911 useless extension candidates. Maximal degree in co-relation 310693. Up to 32984 conditions per place. [2023-01-28 11:57:26,888 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 429 selfloop transitions, 1686 changer transitions 0/2115 dead transitions. [2023-01-28 11:57:26,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2115 transitions, 57396 flow [2023-01-28 11:57:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 11:57:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 11:57:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 956 transitions. [2023-01-28 11:57:26,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034228541337546 [2023-01-28 11:57:26,889 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 956 transitions. [2023-01-28 11:57:26,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 956 transitions. [2023-01-28 11:57:26,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:57:26,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 956 transitions. [2023-01-28 11:57:26,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.22222222222223) internal successors, (956), 9 states have internal predecessors, (956), 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) [2023-01-28 11:57:26,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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) [2023-01-28 11:57:26,891 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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) [2023-01-28 11:57:26,892 INFO L175 Difference]: Start difference. First operand has 458 places, 1400 transitions, 34280 flow. Second operand 9 states and 956 transitions. [2023-01-28 11:57:26,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2115 transitions, 57396 flow [2023-01-28 11:57:32,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 2115 transitions, 54307 flow, removed 186 selfloop flow, removed 16 redundant places. [2023-01-28 11:57:32,041 INFO L231 Difference]: Finished difference. Result has 451 places, 2058 transitions, 53750 flow [2023-01-28 11:57:32,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=31687, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=53750, PETRI_PLACES=451, PETRI_TRANSITIONS=2058} [2023-01-28 11:57:32,043 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 432 predicate places. [2023-01-28 11:57:32,043 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 2058 transitions, 53750 flow [2023-01-28 11:57:32,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 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) [2023-01-28 11:57:32,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:57:32,043 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:57:32,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 11:57:32,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:57:32,244 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:57:32,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:57:32,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1696556976, now seen corresponding path program 24 times [2023-01-28 11:57:32,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:57:32,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438827674] [2023-01-28 11:57:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:57:32,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:57:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:57:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:57:32,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:57:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438827674] [2023-01-28 11:57:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438827674] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:57:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656993404] [2023-01-28 11:57:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:57:32,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:57:32,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:57:32,993 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:57:32,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 11:57:33,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 11:57:33,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:57:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 11:57:33,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:57:34,351 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-28 11:57:34,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-01-28 11:57:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 22 proven. 46 refuted. 1 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:57:34,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:57:34,652 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:57:34,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2023-01-28 11:57:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:57:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656993404] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:57:35,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:57:35,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 54 [2023-01-28 11:57:35,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899991568] [2023-01-28 11:57:35,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:57:35,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-01-28 11:57:35,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:57:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-01-28 11:57:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2651, Unknown=1, NotChecked=0, Total=3080 [2023-01-28 11:57:35,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-01-28 11:57:35,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 2058 transitions, 53750 flow. Second operand has 56 states, 56 states have (on average 69.33928571428571) internal successors, (3883), 56 states have internal predecessors, (3883), 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) [2023-01-28 11:57:35,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:57:35,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-01-28 11:57:35,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:59:52,024 INFO L130 PetriNetUnfolder]: 60511/112212 cut-off events. [2023-01-28 11:59:52,024 INFO L131 PetriNetUnfolder]: For 1304647/1304647 co-relation queries the response was YES. [2023-01-28 11:59:53,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665163 conditions, 112212 events. 60511/112212 cut-off events. For 1304647/1304647 co-relation queries the response was YES. Maximal size of possible extension queue 5972. Compared 1237341 event pairs, 1903 based on Foata normal form. 2318/114530 useless extension candidates. Maximal degree in co-relation 637446. Up to 69351 conditions per place. [2023-01-28 11:59:53,375 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 1148 selfloop transitions, 2884 changer transitions 4183/8215 dead transitions. [2023-01-28 11:59:53,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 8215 transitions, 150700 flow [2023-01-28 11:59:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 534 states. [2023-01-28 11:59:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2023-01-28 11:59:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 40699 transitions. [2023-01-28 11:59:53,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36121021708646184 [2023-01-28 11:59:53,398 INFO L72 ComplementDD]: Start complementDD. Operand 534 states and 40699 transitions. [2023-01-28 11:59:53,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 40699 transitions. [2023-01-28 11:59:53,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:59:53,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 534 states and 40699 transitions. [2023-01-28 11:59:53,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 535 states, 534 states have (on average 76.21535580524345) internal successors, (40699), 534 states have internal predecessors, (40699), 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) [2023-01-28 11:59:53,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 535 states, 535 states have (on average 211.0) internal successors, (112885), 535 states have internal predecessors, (112885), 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) [2023-01-28 11:59:53,507 INFO L81 ComplementDD]: Finished complementDD. Result has 535 states, 535 states have (on average 211.0) internal successors, (112885), 535 states have internal predecessors, (112885), 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) [2023-01-28 11:59:53,507 INFO L175 Difference]: Start difference. First operand has 451 places, 2058 transitions, 53750 flow. Second operand 534 states and 40699 transitions. [2023-01-28 11:59:53,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 8215 transitions, 150700 flow [2023-01-28 12:00:21,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 984 places, 8215 transitions, 146432 flow, removed 2134 selfloop flow, removed 0 redundant places. [2023-01-28 12:00:21,411 INFO L231 Difference]: Finished difference. Result has 1035 places, 2998 transitions, 81531 flow [2023-01-28 12:00:21,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=50856, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2044, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=534, PETRI_FLOW=81531, PETRI_PLACES=1035, PETRI_TRANSITIONS=2998} [2023-01-28 12:00:21,413 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1016 predicate places. [2023-01-28 12:00:21,414 INFO L495 AbstractCegarLoop]: Abstraction has has 1035 places, 2998 transitions, 81531 flow [2023-01-28 12:00:21,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 69.33928571428571) internal successors, (3883), 56 states have internal predecessors, (3883), 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) [2023-01-28 12:00:21,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:00:21,414 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:00:21,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-28 12:00:21,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 12:00:21,620 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:00:21,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:00:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash -619706638, now seen corresponding path program 25 times [2023-01-28 12:00:21,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:00:21,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001660093] [2023-01-28 12:00:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:00:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:00:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:00:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:00:22,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:00:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001660093] [2023-01-28 12:00:22,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001660093] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:00:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749966601] [2023-01-28 12:00:22,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:00:22,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:00:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:00:22,907 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:00:22,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 12:00:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:00:23,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 63 conjunts are in the unsatisfiable core [2023-01-28 12:00:23,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:00:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 12:00:23,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 12:00:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:00:23,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:00:24,196 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1095 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1095) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 24)))) is different from false [2023-01-28 12:00:24,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 12:00:24,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-01-28 12:00:24,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-28 12:00:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 7 not checked. [2023-01-28 12:00:24,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749966601] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:00:24,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:00:24,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 17] total 62 [2023-01-28 12:00:24,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901984806] [2023-01-28 12:00:24,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:00:24,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-01-28 12:00:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:00:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-01-28 12:00:24,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3719, Unknown=1, NotChecked=122, Total=4032 [2023-01-28 12:00:24,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 211 [2023-01-28 12:00:24,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1035 places, 2998 transitions, 81531 flow. Second operand has 64 states, 64 states have (on average 72.359375) internal successors, (4631), 64 states have internal predecessors, (4631), 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) [2023-01-28 12:00:24,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:00:24,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 211 [2023-01-28 12:00:24,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:23,713 INFO L130 PetriNetUnfolder]: 44583/80153 cut-off events. [2023-01-28 12:01:23,713 INFO L131 PetriNetUnfolder]: For 1388875/1388875 co-relation queries the response was YES. [2023-01-28 12:01:25,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508813 conditions, 80153 events. 44583/80153 cut-off events. For 1388875/1388875 co-relation queries the response was YES. Maximal size of possible extension queue 4222. Compared 813253 event pairs, 2128 based on Foata normal form. 23/80176 useless extension candidates. Maximal degree in co-relation 507396. Up to 50933 conditions per place. [2023-01-28 12:01:25,436 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 422 selfloop transitions, 3037 changer transitions 217/3676 dead transitions. [2023-01-28 12:01:25,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 915 places, 3676 transitions, 103722 flow [2023-01-28 12:01:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 12:01:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 12:01:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3121 transitions. [2023-01-28 12:01:25,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697867298578199 [2023-01-28 12:01:25,461 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3121 transitions. [2023-01-28 12:01:25,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3121 transitions. [2023-01-28 12:01:25,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:25,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3121 transitions. [2023-01-28 12:01:25,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 78.025) internal successors, (3121), 40 states have internal predecessors, (3121), 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) [2023-01-28 12:01:25,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 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) [2023-01-28 12:01:25,468 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 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) [2023-01-28 12:01:25,468 INFO L175 Difference]: Start difference. First operand has 1035 places, 2998 transitions, 81531 flow. Second operand 40 states and 3121 transitions. [2023-01-28 12:01:25,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 915 places, 3676 transitions, 103722 flow [2023-01-28 12:01:47,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 844 places, 3676 transitions, 80554 flow, removed 8389 selfloop flow, removed 71 redundant places. [2023-01-28 12:01:47,491 INFO L231 Difference]: Finished difference. Result has 847 places, 3294 transitions, 77314 flow [2023-01-28 12:01:47,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=62774, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=77314, PETRI_PLACES=847, PETRI_TRANSITIONS=3294} [2023-01-28 12:01:47,497 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 828 predicate places. [2023-01-28 12:01:47,497 INFO L495 AbstractCegarLoop]: Abstraction has has 847 places, 3294 transitions, 77314 flow [2023-01-28 12:01:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 72.359375) internal successors, (4631), 64 states have internal predecessors, (4631), 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) [2023-01-28 12:01:47,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:47,498 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:47,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 12:01:47,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 12:01:47,704 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:01:47,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1483758468, now seen corresponding path program 26 times [2023-01-28 12:01:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:47,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872132037] [2023-01-28 12:01:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:47,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 54 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 12:01:48,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:48,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872132037] [2023-01-28 12:01:48,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872132037] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:48,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266939802] [2023-01-28 12:01:48,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:01:48,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:48,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:48,333 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:01:48,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 12:01:48,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:01:48,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:48,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 12:01:48,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 12:01:49,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 47 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 12:01:49,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266939802] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:01:49,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:01:49,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 18] total 56 [2023-01-28 12:01:49,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260556691] [2023-01-28 12:01:49,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:01:49,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-01-28 12:01:49,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:49,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-01-28 12:01:49,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=2361, Unknown=0, NotChecked=0, Total=3192 [2023-01-28 12:01:49,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-28 12:01:49,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 847 places, 3294 transitions, 77314 flow. Second operand has 57 states, 57 states have (on average 82.3859649122807) internal successors, (4696), 57 states have internal predecessors, (4696), 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) [2023-01-28 12:01:49,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:49,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-28 12:01:49,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:02:38,732 INFO L130 PetriNetUnfolder]: 38650/70541 cut-off events. [2023-01-28 12:02:38,733 INFO L131 PetriNetUnfolder]: For 817484/817484 co-relation queries the response was YES. [2023-01-28 12:02:39,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462207 conditions, 70541 events. 38650/70541 cut-off events. For 817484/817484 co-relation queries the response was YES. Maximal size of possible extension queue 3677. Compared 727685 event pairs, 22450 based on Foata normal form. 139/70680 useless extension candidates. Maximal degree in co-relation 462090. Up to 68552 conditions per place. [2023-01-28 12:02:40,035 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 2807 selfloop transitions, 9 changer transitions 188/3004 dead transitions. [2023-01-28 12:02:40,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 3004 transitions, 78587 flow [2023-01-28 12:02:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 12:02:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 12:02:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2177 transitions. [2023-01-28 12:02:40,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127014218009479 [2023-01-28 12:02:40,056 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2177 transitions. [2023-01-28 12:02:40,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2177 transitions. [2023-01-28 12:02:40,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:02:40,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2177 transitions. [2023-01-28 12:02:40,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 87.08) internal successors, (2177), 25 states have internal predecessors, (2177), 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) [2023-01-28 12:02:40,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 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) [2023-01-28 12:02:40,076 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 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) [2023-01-28 12:02:40,076 INFO L175 Difference]: Start difference. First operand has 847 places, 3294 transitions, 77314 flow. Second operand 25 states and 2177 transitions. [2023-01-28 12:02:40,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 3004 transitions, 78587 flow [2023-01-28 12:03:00,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 3004 transitions, 76412 flow, removed 909 selfloop flow, removed 30 redundant places. [2023-01-28 12:03:00,993 INFO L231 Difference]: Finished difference. Result has 628 places, 2816 transitions, 68533 flow [2023-01-28 12:03:00,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=69829, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=68533, PETRI_PLACES=628, PETRI_TRANSITIONS=2816} [2023-01-28 12:03:00,995 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 609 predicate places. [2023-01-28 12:03:00,995 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 2816 transitions, 68533 flow [2023-01-28 12:03:00,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 82.3859649122807) internal successors, (4696), 57 states have internal predecessors, (4696), 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) [2023-01-28 12:03:00,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:03:00,996 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:03:01,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 12:03:01,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 12:03:01,197 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:03:01,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:03:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1586155685, now seen corresponding path program 27 times [2023-01-28 12:03:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:03:01,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409026374] [2023-01-28 12:03:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:03:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:03:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:03:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-01-28 12:03:01,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:03:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409026374] [2023-01-28 12:03:01,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409026374] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:03:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811624050] [2023-01-28 12:03:01,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:03:01,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:03:01,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:03:01,339 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:03:01,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 12:03:01,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-28 12:03:01,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:03:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 12:03:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:03:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-01-28 12:03:01,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:03:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-01-28 12:03:01,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811624050] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:03:01,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:03:01,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2023-01-28 12:03:01,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442940443] [2023-01-28 12:03:01,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:03:01,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 12:03:01,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:03:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 12:03:01,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2023-01-28 12:03:01,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-28 12:03:01,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 2816 transitions, 68533 flow. Second operand has 11 states, 11 states have (on average 99.0909090909091) internal successors, (1090), 11 states have internal predecessors, (1090), 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) [2023-01-28 12:03:01,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:03:01,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-28 12:03:01,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:04:01,654 INFO L130 PetriNetUnfolder]: 55244/101142 cut-off events. [2023-01-28 12:04:01,654 INFO L131 PetriNetUnfolder]: For 1366240/1366240 co-relation queries the response was YES. [2023-01-28 12:04:02,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627822 conditions, 101142 events. 55244/101142 cut-off events. For 1366240/1366240 co-relation queries the response was YES. Maximal size of possible extension queue 5303. Compared 1083006 event pairs, 6563 based on Foata normal form. 12/101154 useless extension candidates. Maximal degree in co-relation 627718. Up to 62378 conditions per place. [2023-01-28 12:04:02,959 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 795 selfloop transitions, 3443 changer transitions 2/4240 dead transitions. [2023-01-28 12:04:02,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 4240 transitions, 107383 flow [2023-01-28 12:04:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 12:04:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 12:04:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1063 transitions. [2023-01-28 12:04:02,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037914691943128 [2023-01-28 12:04:02,961 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1063 transitions. [2023-01-28 12:04:02,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1063 transitions. [2023-01-28 12:04:02,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:04:02,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1063 transitions. [2023-01-28 12:04:02,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.3) internal successors, (1063), 10 states have internal predecessors, (1063), 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) [2023-01-28 12:04:02,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 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) [2023-01-28 12:04:02,964 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 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) [2023-01-28 12:04:02,964 INFO L175 Difference]: Start difference. First operand has 628 places, 2816 transitions, 68533 flow. Second operand 10 states and 1063 transitions. [2023-01-28 12:04:02,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 4240 transitions, 107383 flow [2023-01-28 12:04:31,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 4240 transitions, 107226 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-01-28 12:04:31,811 INFO L231 Difference]: Finished difference. Result has 548 places, 4174 transitions, 107028 flow [2023-01-28 12:04:31,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=68424, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=107028, PETRI_PLACES=548, PETRI_TRANSITIONS=4174} [2023-01-28 12:04:31,813 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 529 predicate places. [2023-01-28 12:04:31,813 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 4174 transitions, 107028 flow [2023-01-28 12:04:31,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 99.0909090909091) internal successors, (1090), 11 states have internal predecessors, (1090), 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) [2023-01-28 12:04:31,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:04:31,814 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:04:31,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 12:04:32,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:04:32,020 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 12:04:32,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:04:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash 54583928, now seen corresponding path program 28 times [2023-01-28 12:04:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:04:32,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767078119] [2023-01-28 12:04:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:04:32,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:04:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:04:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:04:33,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:04:33,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767078119] [2023-01-28 12:04:33,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767078119] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:04:33,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766384910] [2023-01-28 12:04:33,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:04:33,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:04:33,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:04:33,532 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 12:04:33,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 12:04:33,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:04:33,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:04:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 12:04:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:04:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 12:04:34,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:04:34,515 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 12:04:34,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-01-28 12:04:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-01-28 12:04:34,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766384910] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:04:34,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:04:34,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 15] total 56 [2023-01-28 12:04:34,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698239170] [2023-01-28 12:04:34,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:04:34,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-01-28 12:04:34,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:04:34,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-01-28 12:04:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3125, Unknown=0, NotChecked=0, Total=3306 [2023-01-28 12:04:34,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-01-28 12:04:34,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 4174 transitions, 107028 flow. Second operand has 58 states, 58 states have (on average 76.37931034482759) internal successors, (4430), 58 states have internal predecessors, (4430), 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) [2023-01-28 12:04:34,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:04:34,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-01-28 12:04:34,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 12:08:12,273 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 12:08:12,273 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 12:08:13,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:13,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-01-28 12:08:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1434 states. [2023-01-28 12:08:14,361 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 12:08:14,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-01-28 12:08:14,362 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (58states, 75/211 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 1116971 conditions, 170282 events (97297/170281 cut-off events. For 2245712/2245712 co-relation queries the response was YES. Maximal size of possible extension queue 10878. Compared 1929308 event pairs, 3924 based on Foata normal form. 0/180727 useless extension candidates. Maximal degree in co-relation 1116870. Up to 113378 conditions per place.). [2023-01-28 12:08:14,363 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 12:08:14,363 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 12:08:14,363 INFO L445 BasicCegarLoop]: Path program histogram: [28, 1, 1, 1] [2023-01-28 12:08:14,375 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 12:08:14,375 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 12:08:14,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 12:08:14 BasicIcfg [2023-01-28 12:08:14,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 12:08:14,383 INFO L158 Benchmark]: Toolchain (without parser) took 816567.20ms. Allocated memory was 320.9MB in the beginning and 14.7GB in the end (delta: 14.4GB). Free memory was 290.2MB in the beginning and 11.0GB in the end (delta: -10.7GB). Peak memory consumption was 3.7GB. Max. memory is 16.0GB. [2023-01-28 12:08:14,383 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 12:08:14,383 INFO L158 Benchmark]: CACSL2BoogieTranslator took 146.74ms. Allocated memory is still 320.9MB. Free memory was 289.7MB in the beginning and 278.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 12:08:14,387 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.66ms. Allocated memory is still 320.9MB. Free memory was 278.7MB in the beginning and 276.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 12:08:14,387 INFO L158 Benchmark]: Boogie Preprocessor took 30.07ms. Allocated memory is still 320.9MB. Free memory was 276.6MB in the beginning and 275.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 12:08:14,388 INFO L158 Benchmark]: RCFGBuilder took 428.24ms. Allocated memory is still 320.9MB. Free memory was 275.0MB in the beginning and 252.5MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-01-28 12:08:14,388 INFO L158 Benchmark]: TraceAbstraction took 815911.54ms. Allocated memory was 320.9MB in the beginning and 14.7GB in the end (delta: 14.4GB). Free memory was 252.0MB in the beginning and 11.0GB in the end (delta: -10.8GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-01-28 12:08:14,390 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 146.74ms. Allocated memory is still 320.9MB. Free memory was 289.7MB in the beginning and 278.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 44.66ms. Allocated memory is still 320.9MB. Free memory was 278.7MB in the beginning and 276.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.07ms. Allocated memory is still 320.9MB. Free memory was 276.6MB in the beginning and 275.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 428.24ms. Allocated memory is still 320.9MB. Free memory was 275.0MB in the beginning and 252.5MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 815911.54ms. Allocated memory was 320.9MB in the beginning and 14.7GB in the end (delta: 14.4GB). Free memory was 252.0MB in the beginning and 11.0GB in the end (delta: -10.8GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 98 PlacesBefore, 19 PlacesAfterwards, 100 TransitionsBefore, 15 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 6 FixpointIterations, 58 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 8 ConcurrentYvCompositions, 6 ChoiceCompositions, 101 TotalNumberOfCompositions, 513 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 505, independent: 499, independent conditional: 0, independent unconditional: 499, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 255, independent: 252, independent conditional: 0, independent unconditional: 252, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 505, independent: 247, independent conditional: 0, independent unconditional: 247, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 255, unknown conditional: 0, unknown unconditional: 255] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (58states, 75/211 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 1116971 conditions, 170282 events (97297/170281 cut-off events. For 2245712/2245712 co-relation queries the response was YES. Maximal size of possible extension queue 10878. Compared 1929308 event pairs, 3924 based on Foata normal form. 0/180727 useless extension candidates. Maximal degree in co-relation 1116870. Up to 113378 conditions per place.). - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (58states, 75/211 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 1116971 conditions, 170282 events (97297/170281 cut-off events. For 2245712/2245712 co-relation queries the response was YES. Maximal size of possible extension queue 10878. Compared 1929308 event pairs, 3924 based on Foata normal form. 0/180727 useless extension candidates. Maximal degree in co-relation 1116870. Up to 113378 conditions per place.). - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (58states, 75/211 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 1116971 conditions, 170282 events (97297/170281 cut-off events. For 2245712/2245712 co-relation queries the response was YES. Maximal size of possible extension queue 10878. Compared 1929308 event pairs, 3924 based on Foata normal form. 0/180727 useless extension candidates. Maximal degree in co-relation 1116870. Up to 113378 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 120 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 815.8s, OverallIterations: 31, TraceHistogramMax: 8, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 773.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 24596 SdHoareTripleChecker+Valid, 29.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24596 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 25.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 573 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1455 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 55324 IncrementalHoareTripleChecker+Invalid, 57359 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1455 mSolverCounterUnsat, 0 mSDtfsCounter, 55324 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4363 GetRequests, 890 SyntacticMatches, 54 SemanticMatches, 3419 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 1176407 ImplicationChecksByTransitivity, 190.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107028occurred in iteration=30, InterpolantAutomatonStates: 1415, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 28.7s InterpolantComputationTime, 1443 NumberOfCodeBlocks, 1442 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 2058 ConstructedInterpolants, 123 QuantifiedInterpolants, 20385 SizeOfPredicates, 275 NumberOfNonLiveVariables, 7877 ConjunctsInSsa, 910 ConjunctsInUnsatCore, 87 InterpolantComputations, 3 PerfectInterpolantSequences, 1512/3537 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown