/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 22:47:59,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 22:47:59,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 22:47:59,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 22:47:59,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 22:47:59,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 22:47:59,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 22:47:59,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 22:47:59,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 22:47:59,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 22:47:59,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 22:47:59,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 22:47:59,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 22:47:59,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 22:47:59,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 22:47:59,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 22:47:59,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 22:47:59,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 22:47:59,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 22:47:59,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 22:47:59,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 22:47:59,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 22:47:59,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 22:47:59,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 22:47:59,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 22:47:59,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 22:47:59,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 22:47:59,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 22:47:59,488 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 [2023-01-27 22:47:59,508 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 22:47:59,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 22:47:59,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 22:47:59,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 22:47:59,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 22:47:59,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 22:47:59,510 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 22:47:59,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 22:47:59,510 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 22:47:59,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 22:47:59,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 22:47:59,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 22:47:59,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 22:47:59,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:47:59,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 22:47:59,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 22:47:59,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 22:47:59,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 22:47:59,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 22:47:59,512 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 22:47:59,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 22:47:59,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 22:47:59,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 22:47:59,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 22:47:59,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 22:47:59,690 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 22:47:59,691 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 22:47:59,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-01-27 22:48:00,643 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 22:48:00,803 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 22:48:00,803 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-01-27 22:48:00,808 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b51c105ef/e567133a396b4609b3b35cfdaea2a699/FLAG40923217b [2023-01-27 22:48:00,821 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b51c105ef/e567133a396b4609b3b35cfdaea2a699 [2023-01-27 22:48:00,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 22:48:00,824 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 22:48:00,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 22:48:00,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 22:48:00,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 22:48:00,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:00,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102dc6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00, skipping insertion in model container [2023-01-27 22:48:00,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:00,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 22:48:00,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 22:48:00,941 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/popl20-send-receive-alt.wvr.c[2650,2663] [2023-01-27 22:48:00,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:48:00,955 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 22:48:00,967 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/popl20-send-receive-alt.wvr.c[2650,2663] [2023-01-27 22:48:00,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:48:00,974 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:48:00,975 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:48:00,980 INFO L208 MainTranslator]: Completed translation [2023-01-27 22:48:00,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00 WrapperNode [2023-01-27 22:48:00,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 22:48:00,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 22:48:00,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 22:48:00,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 22:48:00,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:00,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,002 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2023-01-27 22:48:01,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 22:48:01,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 22:48:01,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 22:48:01,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 22:48:01,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,017 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 22:48:01,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 22:48:01,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 22:48:01,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 22:48:01,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (1/1) ... [2023-01-27 22:48:01,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:48:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:01,041 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) [2023-01-27 22:48:01,046 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 [2023-01-27 22:48:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 22:48:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 22:48:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 22:48:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 22:48:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 22:48:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 22:48:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 22:48:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 22:48:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 22:48:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 22:48:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 22:48:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 22:48:01,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 22:48:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 22:48:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 22:48:01,071 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 22:48:01,158 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 22:48:01,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 22:48:01,402 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 22:48:01,447 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 22:48:01,447 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 22:48:01,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:48:01 BoogieIcfgContainer [2023-01-27 22:48:01,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 22:48:01,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 22:48:01,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 22:48:01,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 22:48:01,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 10:48:00" (1/3) ... [2023-01-27 22:48:01,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea5e7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:48:01, skipping insertion in model container [2023-01-27 22:48:01,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:48:00" (2/3) ... [2023-01-27 22:48:01,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea5e7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:48:01, skipping insertion in model container [2023-01-27 22:48:01,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:48:01" (3/3) ... [2023-01-27 22:48:01,459 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-01-27 22:48:01,470 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 22:48:01,470 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 22:48:01,470 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 22:48:01,521 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 22:48:01,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 127 transitions, 270 flow [2023-01-27 22:48:01,589 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-01-27 22:48:01,589 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:48:01,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-27 22:48:01,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 127 transitions, 270 flow [2023-01-27 22:48:01,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 117 transitions, 246 flow [2023-01-27 22:48:01,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 22:48:01,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 117 transitions, 246 flow [2023-01-27 22:48:01,606 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 117 transitions, 246 flow [2023-01-27 22:48:01,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 117 transitions, 246 flow [2023-01-27 22:48:01,641 INFO L130 PetriNetUnfolder]: 11/117 cut-off events. [2023-01-27 22:48:01,641 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:48:01,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 11/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-27 22:48:01,644 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-01-27 22:48:05,208 INFO L134 LiptonReduction]: Checked pairs total: 883 [2023-01-27 22:48:05,208 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-01-27 22:48:05,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 22:48:05,232 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;@1a0124f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 22:48:05,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 22:48:05,247 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-01-27 22:48:05,247 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:48:05,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:05,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:05,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:05,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:05,254 INFO L85 PathProgramCache]: Analyzing trace with hash -238231372, now seen corresponding path program 1 times [2023-01-27 22:48:05,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:05,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460288293] [2023-01-27 22:48:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:05,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460288293] [2023-01-27 22:48:05,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460288293] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:48:05,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:48:05,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 22:48:05,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834135751] [2023-01-27 22:48:05,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:48:05,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 22:48:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:05,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 22:48:05,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 22:48:05,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 257 [2023-01-27 22:48:05,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2023-01-27 22:48:05,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:05,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 257 [2023-01-27 22:48:05,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:05,733 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2023-01-27 22:48:05,734 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-27 22:48:05,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-01-27 22:48:05,738 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-01-27 22:48:05,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-01-27 22:48:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 22:48:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 22:48:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-01-27 22:48:05,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46173800259403375 [2023-01-27 22:48:05,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-01-27 22:48:05,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-01-27 22:48:05,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:05,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-01-27 22:48:05,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2023-01-27 22:48:05,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2023-01-27 22:48:05,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2023-01-27 22:48:05,779 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 356 transitions. [2023-01-27 22:48:05,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-01-27 22:48:05,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 22:48:05,782 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-01-27 22:48:05,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-01-27 22:48:05,786 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-27 22:48:05,786 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-01-27 22:48:05,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2023-01-27 22:48:05,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:05,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:05,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 22:48:05,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:05,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1359864469, now seen corresponding path program 1 times [2023-01-27 22:48:05,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:05,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970499647] [2023-01-27 22:48:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:05,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:05,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:05,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970499647] [2023-01-27 22:48:05,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970499647] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:48:05,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:48:05,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 22:48:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810780475] [2023-01-27 22:48:05,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:48:05,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 22:48:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:05,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 22:48:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 22:48:05,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 257 [2023-01-27 22:48:05,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-01-27 22:48:05,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:05,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 257 [2023-01-27 22:48:05,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:05,968 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2023-01-27 22:48:05,968 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-01-27 22:48:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 230 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-01-27 22:48:05,969 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-01-27 22:48:05,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-01-27 22:48:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 22:48:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 22:48:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-01-27 22:48:05,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345006485084306 [2023-01-27 22:48:05,971 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-01-27 22:48:05,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-01-27 22:48:05,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:05,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-01-27 22:48:05,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2023-01-27 22:48:05,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2023-01-27 22:48:05,975 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2023-01-27 22:48:05,975 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 335 transitions. [2023-01-27 22:48:05,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-01-27 22:48:05,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 22:48:05,976 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-01-27 22:48:05,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-01-27 22:48:05,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-01-27 22:48:05,977 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-01-27 22:48:05,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-01-27 22:48:05,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:05,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:05,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 22:48:05,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:05,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:05,979 INFO L85 PathProgramCache]: Analyzing trace with hash 210856546, now seen corresponding path program 1 times [2023-01-27 22:48:05,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:05,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592472481] [2023-01-27 22:48:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:05,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:48:06,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:06,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592472481] [2023-01-27 22:48:06,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592472481] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:48:06,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:48:06,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 22:48:06,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587233304] [2023-01-27 22:48:06,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:48:06,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:48:06,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:06,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:48:06,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 22:48:06,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 257 [2023-01-27 22:48:06,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 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) [2023-01-27 22:48:06,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:06,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 257 [2023-01-27 22:48:06,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:06,147 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2023-01-27 22:48:06,147 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-01-27 22:48:06,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 400 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-01-27 22:48:06,148 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-01-27 22:48:06,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-01-27 22:48:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:48:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:48:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-01-27 22:48:06,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036964980544747 [2023-01-27 22:48:06,153 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-01-27 22:48:06,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-01-27 22:48:06,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:06,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-01-27 22:48:06,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 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) [2023-01-27 22:48:06,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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) [2023-01-27 22:48:06,156 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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) [2023-01-27 22:48:06,156 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 415 transitions. [2023-01-27 22:48:06,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-01-27 22:48:06,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 22:48:06,158 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-01-27 22:48:06,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=56, 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=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-01-27 22:48:06,159 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-27 22:48:06,161 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-01-27 22:48:06,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 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) [2023-01-27 22:48:06,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:06,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:06,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 22:48:06,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:06,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash -961979074, now seen corresponding path program 1 times [2023-01-27 22:48:06,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:06,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771042351] [2023-01-27 22:48:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:06,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:06,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771042351] [2023-01-27 22:48:06,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771042351] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:06,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941188076] [2023-01-27 22:48:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:06,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:06,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:06,917 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) [2023-01-27 22:48:06,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 22:48:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:07,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 22:48:07,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:07,136 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 [2023-01-27 22:48:07,172 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 [2023-01-27 22:48:07,202 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 [2023-01-27 22:48:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:07,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:07,576 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (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|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (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|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-01-27 22:48:07,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:07,598 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 62 treesize of output 50 [2023-01-27 22:48:07,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:07,612 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 316 treesize of output 292 [2023-01-27 22:48:07,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:07,646 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 96 treesize of output 92 [2023-01-27 22:48:07,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:07,655 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 95 treesize of output 79 [2023-01-27 22:48:07,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:07,786 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 62 treesize of output 50 [2023-01-27 22:48:07,795 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 22:48:07,795 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 148 treesize of output 136 [2023-01-27 22:48:07,804 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 22:48:07,805 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 132 treesize of output 112 [2023-01-27 22:48:07,814 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 22:48:07,815 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 83 treesize of output 75 [2023-01-27 22:48:07,850 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 22:48:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-27 22:48:07,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941188076] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:07,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:07,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-01-27 22:48:07,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961815679] [2023-01-27 22:48:07,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:07,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:48:07,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:07,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:48:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=4, NotChecked=36, Total=420 [2023-01-27 22:48:07,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-27 22:48:07,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 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) [2023-01-27 22:48:07,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:07,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-27 22:48:07,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:08,001 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse12 (* c_~front~0 4)) (.cse13 (* c_~back~0 4))) (let ((.cse5 (+ c_~queue~0.offset .cse13)) (.cse3 (+ c_~queue~0.offset .cse12)) (.cse0 (<= c_~n~0 c_~back~0)) (.cse4 (< c_~back~0 0))) (and (let ((.cse2 (select |c_#memory_int| c_~queue~0.base))) (or .cse0 (let ((.cse1 (+ c_~sum~0 (select .cse2 .cse3)))) (and (<= .cse1 1) (<= 0 .cse1))) .cse4 (not (= (select .cse2 .cse5) 1)))) (or .cse0 .cse4 (and (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base))) (or (not (= (select .cse6 .cse5) 1)) (<= (+ c_~sum~0 (select .cse6 .cse3)) 1)))) (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base))) (or (not (= (select .cse7 .cse5) 1)) (<= 0 (+ c_~sum~0 (select .cse7 .cse3)))))))) (<= 0 c_~sum~0) (<= c_~sum~0 1) (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse0 (and (<= c_~sum~0 0) (<= 0 (+ c_~sum~0 1)) (= c_~back~0 c_~front~0)) .cse4) (or .cse0 (let ((.cse10 (+ .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (+ .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse8 (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|))) (or (<= (+ c_~sum~0 (select .cse8 .cse9)) 1) (not (= (select .cse8 .cse10) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse11 (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|))) (or (not (= (select .cse11 .cse10) 1)) (<= 0 (+ c_~sum~0 (select .cse11 .cse9)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse4)))) is different from false [2023-01-27 22:48:08,488 INFO L130 PetriNetUnfolder]: 151/307 cut-off events. [2023-01-27 22:48:08,488 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2023-01-27 22:48:08,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 307 events. 151/307 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1194 event pairs, 30 based on Foata normal form. 12/315 useless extension candidates. Maximal degree in co-relation 726. Up to 111 conditions per place. [2023-01-27 22:48:08,490 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 27 selfloop transitions, 12 changer transitions 47/86 dead transitions. [2023-01-27 22:48:08,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 86 transitions, 430 flow [2023-01-27 22:48:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 22:48:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 22:48:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1138 transitions. [2023-01-27 22:48:08,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.295201037613489 [2023-01-27 22:48:08,493 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1138 transitions. [2023-01-27 22:48:08,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1138 transitions. [2023-01-27 22:48:08,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:08,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1138 transitions. [2023-01-27 22:48:08,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 75.86666666666666) internal successors, (1138), 15 states have internal predecessors, (1138), 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) [2023-01-27 22:48:08,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 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) [2023-01-27 22:48:08,500 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 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) [2023-01-27 22:48:08,500 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 15 states and 1138 transitions. [2023-01-27 22:48:08,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 86 transitions, 430 flow [2023-01-27 22:48:08,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 86 transitions, 420 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 22:48:08,502 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 165 flow [2023-01-27 22:48:08,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=165, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-01-27 22:48:08,502 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-01-27 22:48:08,502 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 165 flow [2023-01-27 22:48:08,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 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) [2023-01-27 22:48:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:08,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 22:48:08,708 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 [2023-01-27 22:48:08,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:08,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash -438286575, now seen corresponding path program 2 times [2023-01-27 22:48:08,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:08,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348675531] [2023-01-27 22:48:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:48:08,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:08,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348675531] [2023-01-27 22:48:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348675531] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:08,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995714261] [2023-01-27 22:48:08,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:48:08,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:08,812 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) [2023-01-27 22:48:08,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 22:48:08,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:48:08,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:48:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:48:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:08,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 118 treesize of output 86 [2023-01-27 22:48:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:48:08,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:09,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 128 treesize of output 96 [2023-01-27 22:48:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:48:09,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995714261] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:09,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:09,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-01-27 22:48:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251180295] [2023-01-27 22:48:09,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:09,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 22:48:09,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 22:48:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-01-27 22:48:09,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2023-01-27 22:48:09,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:48:09,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:09,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2023-01-27 22:48:09,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:09,124 INFO L130 PetriNetUnfolder]: 184/362 cut-off events. [2023-01-27 22:48:09,125 INFO L131 PetriNetUnfolder]: For 358/362 co-relation queries the response was YES. [2023-01-27 22:48:09,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 362 events. 184/362 cut-off events. For 358/362 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1481 event pairs, 46 based on Foata normal form. 12/369 useless extension candidates. Maximal degree in co-relation 834. Up to 142 conditions per place. [2023-01-27 22:48:09,126 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 38 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2023-01-27 22:48:09,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 350 flow [2023-01-27 22:48:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:48:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:48:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2023-01-27 22:48:09,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448443579766537 [2023-01-27 22:48:09,128 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2023-01-27 22:48:09,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2023-01-27 22:48:09,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:09,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2023-01-27 22:48:09,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 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) [2023-01-27 22:48:09,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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) [2023-01-27 22:48:09,130 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 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) [2023-01-27 22:48:09,130 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 165 flow. Second operand 4 states and 461 transitions. [2023-01-27 22:48:09,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 350 flow [2023-01-27 22:48:09,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 308 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-01-27 22:48:09,133 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 222 flow [2023-01-27 22:48:09,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-01-27 22:48:09,133 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-01-27 22:48:09,133 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 222 flow [2023-01-27 22:48:09,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:48:09,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:09,134 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:09,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 22:48:09,338 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 [2023-01-27 22:48:09,339 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:09,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:09,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1347002828, now seen corresponding path program 3 times [2023-01-27 22:48:09,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:09,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47254790] [2023-01-27 22:48:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:09,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:10,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:10,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47254790] [2023-01-27 22:48:10,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47254790] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:10,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979728388] [2023-01-27 22:48:10,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:48:10,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:10,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:10,208 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) [2023-01-27 22:48:10,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 22:48:10,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:48:10,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:48:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-27 22:48:10,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:48:10,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:10,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:10,480 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 68 treesize of output 44 [2023-01-27 22:48:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:48:10,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979728388] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:10,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:10,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-01-27 22:48:10,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234264763] [2023-01-27 22:48:10,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:10,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:48:10,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:48:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:48:10,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:48:10,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 222 flow. Second operand has 22 states, 22 states have (on average 79.13636363636364) internal successors, (1741), 22 states have internal predecessors, (1741), 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) [2023-01-27 22:48:10,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:10,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:48:10,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:11,152 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2023-01-27 22:48:11,152 INFO L131 PetriNetUnfolder]: For 849/849 co-relation queries the response was YES. [2023-01-27 22:48:11,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 613 events. 313/613 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2843 event pairs, 48 based on Foata normal form. 3/614 useless extension candidates. Maximal degree in co-relation 1298. Up to 174 conditions per place. [2023-01-27 22:48:11,154 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 49 selfloop transitions, 25 changer transitions 44/118 dead transitions. [2023-01-27 22:48:11,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 118 transitions, 767 flow [2023-01-27 22:48:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 22:48:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 22:48:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1337 transitions. [2023-01-27 22:48:11,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32514591439688717 [2023-01-27 22:48:11,157 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1337 transitions. [2023-01-27 22:48:11,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1337 transitions. [2023-01-27 22:48:11,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:11,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1337 transitions. [2023-01-27 22:48:11,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 83.5625) internal successors, (1337), 16 states have internal predecessors, (1337), 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) [2023-01-27 22:48:11,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 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) [2023-01-27 22:48:11,164 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 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) [2023-01-27 22:48:11,164 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 222 flow. Second operand 16 states and 1337 transitions. [2023-01-27 22:48:11,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 118 transitions, 767 flow [2023-01-27 22:48:11,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 118 transitions, 737 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-01-27 22:48:11,167 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 367 flow [2023-01-27 22:48:11,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=367, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-01-27 22:48:11,168 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-01-27 22:48:11,168 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 367 flow [2023-01-27 22:48:11,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.13636363636364) internal successors, (1741), 22 states have internal predecessors, (1741), 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) [2023-01-27 22:48:11,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:11,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:11,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 22:48:11,374 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 [2023-01-27 22:48:11,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:11,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:11,375 INFO L85 PathProgramCache]: Analyzing trace with hash -218673542, now seen corresponding path program 4 times [2023-01-27 22:48:11,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:11,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635137534] [2023-01-27 22:48:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:11,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:12,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635137534] [2023-01-27 22:48:12,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635137534] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568038173] [2023-01-27 22:48:12,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:48:12,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:12,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:12,094 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) [2023-01-27 22:48:12,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 22:48:12,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:48:12,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:48:12,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 22:48:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:48:12,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:12,604 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 22:48:12,605 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 216 treesize of output 170 [2023-01-27 22:48:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:48:12,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568038173] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:12,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:12,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 21 [2023-01-27 22:48:12,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700737664] [2023-01-27 22:48:12,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:12,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 22:48:12,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 22:48:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-01-27 22:48:12,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:48:12,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 367 flow. Second operand has 23 states, 23 states have (on average 79.21739130434783) internal successors, (1822), 23 states have internal predecessors, (1822), 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) [2023-01-27 22:48:12,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:12,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:48:12,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:13,505 INFO L130 PetriNetUnfolder]: 441/846 cut-off events. [2023-01-27 22:48:13,506 INFO L131 PetriNetUnfolder]: For 1454/1454 co-relation queries the response was YES. [2023-01-27 22:48:13,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2805 conditions, 846 events. 441/846 cut-off events. For 1454/1454 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4222 event pairs, 20 based on Foata normal form. 2/848 useless extension candidates. Maximal degree in co-relation 2116. Up to 186 conditions per place. [2023-01-27 22:48:13,509 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 63 selfloop transitions, 35 changer transitions 63/161 dead transitions. [2023-01-27 22:48:13,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 161 transitions, 1121 flow [2023-01-27 22:48:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 22:48:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 22:48:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1761 transitions. [2023-01-27 22:48:13,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3262923846581434 [2023-01-27 22:48:13,513 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1761 transitions. [2023-01-27 22:48:13,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1761 transitions. [2023-01-27 22:48:13,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:13,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1761 transitions. [2023-01-27 22:48:13,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.85714285714286) internal successors, (1761), 21 states have internal predecessors, (1761), 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) [2023-01-27 22:48:13,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 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) [2023-01-27 22:48:13,521 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 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) [2023-01-27 22:48:13,521 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 367 flow. Second operand 21 states and 1761 transitions. [2023-01-27 22:48:13,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 161 transitions, 1121 flow [2023-01-27 22:48:13,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 161 transitions, 1051 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-01-27 22:48:13,526 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 525 flow [2023-01-27 22:48:13,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=525, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2023-01-27 22:48:13,527 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-01-27 22:48:13,527 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 525 flow [2023-01-27 22:48:13,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 79.21739130434783) internal successors, (1822), 23 states have internal predecessors, (1822), 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) [2023-01-27 22:48:13,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:13,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:13,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-27 22:48:13,732 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 [2023-01-27 22:48:13,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:13,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:13,733 INFO L85 PathProgramCache]: Analyzing trace with hash -417535956, now seen corresponding path program 5 times [2023-01-27 22:48:13,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:13,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835040555] [2023-01-27 22:48:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:13,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:14,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835040555] [2023-01-27 22:48:14,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835040555] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:14,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263740267] [2023-01-27 22:48:14,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:48:14,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:14,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:14,503 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) [2023-01-27 22:48:14,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 22:48:14,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:48:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:48:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 22:48:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:14,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:15,104 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-27 22:48:15,104 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 216 treesize of output 170 [2023-01-27 22:48:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:15,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263740267] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:15,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:15,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-01-27 22:48:15,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997760191] [2023-01-27 22:48:15,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:15,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 22:48:15,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 22:48:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-01-27 22:48:15,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:48:15,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 525 flow. Second operand has 28 states, 28 states have (on average 78.85714285714286) internal successors, (2208), 28 states have internal predecessors, (2208), 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) [2023-01-27 22:48:15,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:15,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:48:15,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:16,606 INFO L130 PetriNetUnfolder]: 569/1117 cut-off events. [2023-01-27 22:48:16,606 INFO L131 PetriNetUnfolder]: For 2072/2072 co-relation queries the response was YES. [2023-01-27 22:48:16,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3729 conditions, 1117 events. 569/1117 cut-off events. For 2072/2072 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6122 event pairs, 76 based on Foata normal form. 41/1158 useless extension candidates. Maximal degree in co-relation 3550. Up to 228 conditions per place. [2023-01-27 22:48:16,611 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 62 selfloop transitions, 33 changer transitions 63/158 dead transitions. [2023-01-27 22:48:16,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 1223 flow [2023-01-27 22:48:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:48:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:48:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1594 transitions. [2023-01-27 22:48:16,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3264386647552734 [2023-01-27 22:48:16,615 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1594 transitions. [2023-01-27 22:48:16,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1594 transitions. [2023-01-27 22:48:16,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:16,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1594 transitions. [2023-01-27 22:48:16,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.89473684210526) internal successors, (1594), 19 states have internal predecessors, (1594), 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) [2023-01-27 22:48:16,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 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) [2023-01-27 22:48:16,623 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 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) [2023-01-27 22:48:16,623 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 525 flow. Second operand 19 states and 1594 transitions. [2023-01-27 22:48:16,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 1223 flow [2023-01-27 22:48:16,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 158 transitions, 1101 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-01-27 22:48:16,629 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 587 flow [2023-01-27 22:48:16,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=587, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-01-27 22:48:16,630 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-01-27 22:48:16,630 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 587 flow [2023-01-27 22:48:16,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 78.85714285714286) internal successors, (2208), 28 states have internal predecessors, (2208), 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) [2023-01-27 22:48:16,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:16,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:16,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-27 22:48:16,835 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 [2023-01-27 22:48:16,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:16,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:16,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1104904085, now seen corresponding path program 6 times [2023-01-27 22:48:16,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:16,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798123674] [2023-01-27 22:48:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:16,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:48:16,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798123674] [2023-01-27 22:48:16,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798123674] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:16,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763760921] [2023-01-27 22:48:16,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:48:16,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:16,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:16,993 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) [2023-01-27 22:48:16,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 22:48:17,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:48:17,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:48:17,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:48:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:17,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:17,172 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 158 treesize of output 108 [2023-01-27 22:48:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:48:17,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:17,378 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 22:48:17,378 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 174 treesize of output 126 [2023-01-27 22:48:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:48:17,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763760921] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:17,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:17,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-01-27 22:48:17,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436939654] [2023-01-27 22:48:17,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:17,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 22:48:17,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 22:48:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-27 22:48:17,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 257 [2023-01-27 22:48:17,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 587 flow. Second operand has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 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) [2023-01-27 22:48:17,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:17,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 257 [2023-01-27 22:48:17,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:17,796 INFO L130 PetriNetUnfolder]: 899/1721 cut-off events. [2023-01-27 22:48:17,797 INFO L131 PetriNetUnfolder]: For 6271/6271 co-relation queries the response was YES. [2023-01-27 22:48:17,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6663 conditions, 1721 events. 899/1721 cut-off events. For 6271/6271 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10303 event pairs, 134 based on Foata normal form. 20/1725 useless extension candidates. Maximal degree in co-relation 5990. Up to 515 conditions per place. [2023-01-27 22:48:17,804 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 69 selfloop transitions, 47 changer transitions 39/158 dead transitions. [2023-01-27 22:48:17,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1466 flow [2023-01-27 22:48:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 22:48:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 22:48:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1377 transitions. [2023-01-27 22:48:17,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35719844357976654 [2023-01-27 22:48:17,807 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1377 transitions. [2023-01-27 22:48:17,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1377 transitions. [2023-01-27 22:48:17,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:17,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1377 transitions. [2023-01-27 22:48:17,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 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) [2023-01-27 22:48:17,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 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) [2023-01-27 22:48:17,814 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 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) [2023-01-27 22:48:17,814 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 587 flow. Second operand 15 states and 1377 transitions. [2023-01-27 22:48:17,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1466 flow [2023-01-27 22:48:17,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 158 transitions, 1379 flow, removed 20 selfloop flow, removed 13 redundant places. [2023-01-27 22:48:17,826 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 973 flow [2023-01-27 22:48:17,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=973, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2023-01-27 22:48:17,827 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-01-27 22:48:17,827 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 973 flow [2023-01-27 22:48:17,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 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) [2023-01-27 22:48:17,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:17,828 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:17,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 22:48:18,033 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 [2023-01-27 22:48:18,034 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:18,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1313718566, now seen corresponding path program 7 times [2023-01-27 22:48:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:18,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327361846] [2023-01-27 22:48:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:18,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:19,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:19,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327361846] [2023-01-27 22:48:19,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327361846] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467154897] [2023-01-27 22:48:19,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:48:19,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:19,087 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) [2023-01-27 22:48:19,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 22:48:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:19,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 22:48:19,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:20,098 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-27 22:48:20,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-01-27 22:48:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467154897] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:20,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:20,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-01-27 22:48:20,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255624940] [2023-01-27 22:48:20,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:20,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-27 22:48:20,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:20,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-27 22:48:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2023-01-27 22:48:20,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:48:20,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 973 flow. Second operand has 38 states, 38 states have (on average 78.55263157894737) internal successors, (2985), 38 states have internal predecessors, (2985), 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) [2023-01-27 22:48:20,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:20,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:48:20,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:30,410 INFO L130 PetriNetUnfolder]: 3356/6261 cut-off events. [2023-01-27 22:48:30,410 INFO L131 PetriNetUnfolder]: For 32787/32787 co-relation queries the response was YES. [2023-01-27 22:48:30,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28264 conditions, 6261 events. 3356/6261 cut-off events. For 32787/32787 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 46665 event pairs, 301 based on Foata normal form. 125/6386 useless extension candidates. Maximal degree in co-relation 25760. Up to 1789 conditions per place. [2023-01-27 22:48:30,443 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 338 selfloop transitions, 256 changer transitions 261/855 dead transitions. [2023-01-27 22:48:30,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 855 transitions, 8620 flow [2023-01-27 22:48:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-01-27 22:48:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-01-27 22:48:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7433 transitions. [2023-01-27 22:48:30,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3324388389462856 [2023-01-27 22:48:30,457 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7433 transitions. [2023-01-27 22:48:30,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7433 transitions. [2023-01-27 22:48:30,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:30,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7433 transitions. [2023-01-27 22:48:30,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 85.4367816091954) internal successors, (7433), 87 states have internal predecessors, (7433), 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) [2023-01-27 22:48:30,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 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) [2023-01-27 22:48:30,499 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 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) [2023-01-27 22:48:30,499 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 973 flow. Second operand 87 states and 7433 transitions. [2023-01-27 22:48:30,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 855 transitions, 8620 flow [2023-01-27 22:48:30,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 855 transitions, 7243 flow, removed 684 selfloop flow, removed 7 redundant places. [2023-01-27 22:48:30,557 INFO L231 Difference]: Finished difference. Result has 225 places, 336 transitions, 5255 flow [2023-01-27 22:48:30,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=5255, PETRI_PLACES=225, PETRI_TRANSITIONS=336} [2023-01-27 22:48:30,558 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2023-01-27 22:48:30,558 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 336 transitions, 5255 flow [2023-01-27 22:48:30,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 78.55263157894737) internal successors, (2985), 38 states have internal predecessors, (2985), 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) [2023-01-27 22:48:30,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:30,559 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:30,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 22:48:30,766 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 [2023-01-27 22:48:30,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:30,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash -533908624, now seen corresponding path program 8 times [2023-01-27 22:48:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:30,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772541875] [2023-01-27 22:48:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:31,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:31,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772541875] [2023-01-27 22:48:31,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772541875] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:31,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098040007] [2023-01-27 22:48:31,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:48:31,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:31,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:31,875 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) [2023-01-27 22:48:31,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 22:48:31,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:48:31,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:48:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-27 22:48:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:32,118 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 [2023-01-27 22:48:32,160 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 [2023-01-27 22:48:32,199 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 [2023-01-27 22:48:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:32,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:33,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:33,450 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 182 treesize of output 122 [2023-01-27 22:48:33,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:33,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 772 [2023-01-27 22:48:33,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:33,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 256 treesize of output 300 [2023-01-27 22:48:33,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:33,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 259 [2023-01-27 22:48:37,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:37,289 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 182 treesize of output 122 [2023-01-27 22:48:37,311 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 22:48:37,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 700 [2023-01-27 22:48:37,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:48:37,334 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:48:37,334 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:48:37,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:48:37,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:48:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:48:37,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 216 [2023-01-27 22:48:37,359 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 22:48:37,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 187 [2023-01-27 22:48:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:37,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098040007] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:37,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:37,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-01-27 22:48:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104806557] [2023-01-27 22:48:37,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:37,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 22:48:37,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 22:48:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1301, Unknown=7, NotChecked=0, Total=1560 [2023-01-27 22:48:37,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-27 22:48:37,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 336 transitions, 5255 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 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) [2023-01-27 22:48:37,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:37,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-27 22:48:37,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:43,609 INFO L130 PetriNetUnfolder]: 4551/8460 cut-off events. [2023-01-27 22:48:43,610 INFO L131 PetriNetUnfolder]: For 158967/158967 co-relation queries the response was YES. [2023-01-27 22:48:43,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39133 conditions, 8460 events. 4551/8460 cut-off events. For 158967/158967 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 65441 event pairs, 1481 based on Foata normal form. 16/8476 useless extension candidates. Maximal degree in co-relation 37262. Up to 4858 conditions per place. [2023-01-27 22:48:43,661 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 425 selfloop transitions, 178 changer transitions 171/774 dead transitions. [2023-01-27 22:48:43,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 774 transitions, 10560 flow [2023-01-27 22:48:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-27 22:48:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-27 22:48:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3998 transitions. [2023-01-27 22:48:43,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991619275665968 [2023-01-27 22:48:43,666 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3998 transitions. [2023-01-27 22:48:43,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3998 transitions. [2023-01-27 22:48:43,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:43,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3998 transitions. [2023-01-27 22:48:43,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 76.88461538461539) internal successors, (3998), 52 states have internal predecessors, (3998), 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) [2023-01-27 22:48:43,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 257.0) internal successors, (13621), 53 states have internal predecessors, (13621), 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) [2023-01-27 22:48:43,681 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 257.0) internal successors, (13621), 53 states have internal predecessors, (13621), 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) [2023-01-27 22:48:43,681 INFO L175 Difference]: Start difference. First operand has 225 places, 336 transitions, 5255 flow. Second operand 52 states and 3998 transitions. [2023-01-27 22:48:43,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 774 transitions, 10560 flow [2023-01-27 22:48:44,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 774 transitions, 7545 flow, removed 1496 selfloop flow, removed 8 redundant places. [2023-01-27 22:48:44,223 INFO L231 Difference]: Finished difference. Result has 287 places, 452 transitions, 5497 flow [2023-01-27 22:48:44,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5497, PETRI_PLACES=287, PETRI_TRANSITIONS=452} [2023-01-27 22:48:44,224 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 267 predicate places. [2023-01-27 22:48:44,224 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 452 transitions, 5497 flow [2023-01-27 22:48:44,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 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) [2023-01-27 22:48:44,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:44,224 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:44,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 22:48:44,429 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 [2023-01-27 22:48:44,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:44,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash 360516940, now seen corresponding path program 9 times [2023-01-27 22:48:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:44,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464743657] [2023-01-27 22:48:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:44,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:45,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:45,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464743657] [2023-01-27 22:48:45,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464743657] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:45,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330071331] [2023-01-27 22:48:45,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:48:45,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:45,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:45,554 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) [2023-01-27 22:48:45,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 22:48:45,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:48:45,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:48:45,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-27 22:48:45,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:45,849 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 [2023-01-27 22:48:45,891 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 [2023-01-27 22:48:45,924 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 [2023-01-27 22:48:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:46,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:47,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:47,379 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 182 treesize of output 122 [2023-01-27 22:48:47,430 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-27 22:48:47,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 378 [2023-01-27 22:48:47,482 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-27 22:48:47,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-01-27 22:48:47,538 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-27 22:48:47,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-01-27 22:48:49,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:49,461 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 182 treesize of output 122 [2023-01-27 22:48:49,488 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 22:48:49,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 336 [2023-01-27 22:48:49,514 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 22:48:49,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 256 [2023-01-27 22:48:49,563 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 22:48:49,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 187 [2023-01-27 22:48:49,685 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 22:48:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:48:49,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330071331] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:49,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:49,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-01-27 22:48:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300908178] [2023-01-27 22:48:49,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:49,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-27 22:48:49,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-27 22:48:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1222, Unknown=4, NotChecked=0, Total=1560 [2023-01-27 22:48:49,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-27 22:48:49,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 452 transitions, 5497 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 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) [2023-01-27 22:48:49,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:49,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-27 22:48:49,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:54,618 INFO L130 PetriNetUnfolder]: 4393/8211 cut-off events. [2023-01-27 22:48:54,618 INFO L131 PetriNetUnfolder]: For 137740/137740 co-relation queries the response was YES. [2023-01-27 22:48:54,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33031 conditions, 8211 events. 4393/8211 cut-off events. For 137740/137740 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 63852 event pairs, 1462 based on Foata normal form. 36/8247 useless extension candidates. Maximal degree in co-relation 31877. Up to 6043 conditions per place. [2023-01-27 22:48:54,666 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 390 selfloop transitions, 101 changer transitions 150/641 dead transitions. [2023-01-27 22:48:54,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 641 transitions, 7243 flow [2023-01-27 22:48:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 22:48:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 22:48:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3125 transitions. [2023-01-27 22:48:54,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2965739774129259 [2023-01-27 22:48:54,670 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3125 transitions. [2023-01-27 22:48:54,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3125 transitions. [2023-01-27 22:48:54,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:54,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3125 transitions. [2023-01-27 22:48:54,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 76.21951219512195) internal successors, (3125), 41 states have internal predecessors, (3125), 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) [2023-01-27 22:48:54,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 257.0) internal successors, (10794), 42 states have internal predecessors, (10794), 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) [2023-01-27 22:48:54,679 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 257.0) internal successors, (10794), 42 states have internal predecessors, (10794), 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) [2023-01-27 22:48:54,679 INFO L175 Difference]: Start difference. First operand has 287 places, 452 transitions, 5497 flow. Second operand 41 states and 3125 transitions. [2023-01-27 22:48:54,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 641 transitions, 7243 flow [2023-01-27 22:48:55,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 641 transitions, 6873 flow, removed 144 selfloop flow, removed 17 redundant places. [2023-01-27 22:48:55,197 INFO L231 Difference]: Finished difference. Result has 314 places, 429 transitions, 5084 flow [2023-01-27 22:48:55,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5084, PETRI_PLACES=314, PETRI_TRANSITIONS=429} [2023-01-27 22:48:55,198 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 294 predicate places. [2023-01-27 22:48:55,198 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 429 transitions, 5084 flow [2023-01-27 22:48:55,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 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) [2023-01-27 22:48:55,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:55,198 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:55,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 22:48:55,403 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 [2023-01-27 22:48:55,403 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:55,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash -899584993, now seen corresponding path program 10 times [2023-01-27 22:48:55,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:55,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447902095] [2023-01-27 22:48:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:55,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:48:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:48:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:48:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447902095] [2023-01-27 22:48:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447902095] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:48:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536410107] [2023-01-27 22:48:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:48:55,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:48:55,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:48:55,601 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) [2023-01-27 22:48:55,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 22:48:55,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:48:55,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:48:55,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:48:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:48:55,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:48:55,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 226 treesize of output 140 [2023-01-27 22:48:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:48:55,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:48:56,235 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-01-27 22:48:56,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 260 treesize of output 176 [2023-01-27 22:48:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:48:56,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536410107] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:48:56,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:48:56,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 23 [2023-01-27 22:48:56,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743048610] [2023-01-27 22:48:56,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:48:56,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 22:48:56,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:48:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 22:48:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-01-27 22:48:56,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 257 [2023-01-27 22:48:56,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 429 transitions, 5084 flow. Second operand has 24 states, 24 states have (on average 87.125) internal successors, (2091), 24 states have internal predecessors, (2091), 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) [2023-01-27 22:48:56,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:48:56,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 257 [2023-01-27 22:48:56,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:48:58,360 INFO L130 PetriNetUnfolder]: 3167/6088 cut-off events. [2023-01-27 22:48:58,361 INFO L131 PetriNetUnfolder]: For 59334/59336 co-relation queries the response was YES. [2023-01-27 22:48:58,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23510 conditions, 6088 events. 3167/6088 cut-off events. For 59334/59336 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 47201 event pairs, 479 based on Foata normal form. 248/6324 useless extension candidates. Maximal degree in co-relation 23182. Up to 1320 conditions per place. [2023-01-27 22:48:58,391 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 112 selfloop transitions, 124 changer transitions 209/449 dead transitions. [2023-01-27 22:48:58,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 449 transitions, 6355 flow [2023-01-27 22:48:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 22:48:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 22:48:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2678 transitions. [2023-01-27 22:48:58,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35931839527706966 [2023-01-27 22:48:58,395 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2678 transitions. [2023-01-27 22:48:58,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2678 transitions. [2023-01-27 22:48:58,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:48:58,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2678 transitions. [2023-01-27 22:48:58,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 92.34482758620689) internal successors, (2678), 29 states have internal predecessors, (2678), 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) [2023-01-27 22:48:58,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 257.0) internal successors, (7710), 30 states have internal predecessors, (7710), 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) [2023-01-27 22:48:58,404 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 257.0) internal successors, (7710), 30 states have internal predecessors, (7710), 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) [2023-01-27 22:48:58,404 INFO L175 Difference]: Start difference. First operand has 314 places, 429 transitions, 5084 flow. Second operand 29 states and 2678 transitions. [2023-01-27 22:48:58,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 449 transitions, 6355 flow [2023-01-27 22:48:58,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 449 transitions, 5301 flow, removed 398 selfloop flow, removed 76 redundant places. [2023-01-27 22:48:58,655 INFO L231 Difference]: Finished difference. Result has 240 places, 177 transitions, 2612 flow [2023-01-27 22:48:58,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2612, PETRI_PLACES=240, PETRI_TRANSITIONS=177} [2023-01-27 22:48:58,655 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 220 predicate places. [2023-01-27 22:48:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 177 transitions, 2612 flow [2023-01-27 22:48:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.125) internal successors, (2091), 24 states have internal predecessors, (2091), 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) [2023-01-27 22:48:58,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:48:58,656 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:48:58,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 22:48:58,860 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 [2023-01-27 22:48:58,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:48:58,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:48:58,860 INFO L85 PathProgramCache]: Analyzing trace with hash 600606014, now seen corresponding path program 11 times [2023-01-27 22:48:58,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:48:58,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294231122] [2023-01-27 22:48:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:48:58,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:48:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:49:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:49:02,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:49:02,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294231122] [2023-01-27 22:49:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294231122] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:49:02,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897482772] [2023-01-27 22:49:02,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:49:02,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:49:02,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:49:02,246 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) [2023-01-27 22:49:02,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 22:49:02,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 22:49:02,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:49:02,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 22:49:02,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:49:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:49:02,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:49:03,181 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-27 22:49:03,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-01-27 22:49:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:49:03,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897482772] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:49:03,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:49:03,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 31 [2023-01-27 22:49:03,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580233902] [2023-01-27 22:49:03,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:49:03,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 22:49:03,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:49:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 22:49:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 22:49:03,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-27 22:49:03,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 177 transitions, 2612 flow. Second operand has 33 states, 33 states have (on average 71.81818181818181) internal successors, (2370), 33 states have internal predecessors, (2370), 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) [2023-01-27 22:49:03,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:49:03,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-27 22:49:03,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:49:07,524 INFO L130 PetriNetUnfolder]: 3406/6305 cut-off events. [2023-01-27 22:49:07,525 INFO L131 PetriNetUnfolder]: For 66975/66975 co-relation queries the response was YES. [2023-01-27 22:49:07,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27437 conditions, 6305 events. 3406/6305 cut-off events. For 66975/66975 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 46403 event pairs, 320 based on Foata normal form. 39/6344 useless extension candidates. Maximal degree in co-relation 27367. Up to 1369 conditions per place. [2023-01-27 22:49:07,561 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 188 selfloop transitions, 238 changer transitions 154/580 dead transitions. [2023-01-27 22:49:07,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 580 transitions, 7298 flow [2023-01-27 22:49:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 22:49:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 22:49:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3406 transitions. [2023-01-27 22:49:07,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3012026883622214 [2023-01-27 22:49:07,573 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3406 transitions. [2023-01-27 22:49:07,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3406 transitions. [2023-01-27 22:49:07,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:49:07,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3406 transitions. [2023-01-27 22:49:07,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 77.4090909090909) internal successors, (3406), 44 states have internal predecessors, (3406), 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) [2023-01-27 22:49:07,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 257.0) internal successors, (11565), 45 states have internal predecessors, (11565), 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) [2023-01-27 22:49:07,582 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 257.0) internal successors, (11565), 45 states have internal predecessors, (11565), 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) [2023-01-27 22:49:07,582 INFO L175 Difference]: Start difference. First operand has 240 places, 177 transitions, 2612 flow. Second operand 44 states and 3406 transitions. [2023-01-27 22:49:07,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 580 transitions, 7298 flow [2023-01-27 22:49:07,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 580 transitions, 6305 flow, removed 418 selfloop flow, removed 40 redundant places. [2023-01-27 22:49:07,736 INFO L231 Difference]: Finished difference. Result has 179 places, 310 transitions, 5079 flow [2023-01-27 22:49:07,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5079, PETRI_PLACES=179, PETRI_TRANSITIONS=310} [2023-01-27 22:49:07,737 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-01-27 22:49:07,737 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 310 transitions, 5079 flow [2023-01-27 22:49:07,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 71.81818181818181) internal successors, (2370), 33 states have internal predecessors, (2370), 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) [2023-01-27 22:49:07,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:49:07,737 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:49:07,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 22:49:07,944 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 [2023-01-27 22:49:07,944 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:49:07,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:49:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash 530970796, now seen corresponding path program 12 times [2023-01-27 22:49:07,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:49:07,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202376125] [2023-01-27 22:49:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:49:07,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:49:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:49:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:49:09,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:49:09,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202376125] [2023-01-27 22:49:09,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202376125] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:49:09,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072132188] [2023-01-27 22:49:09,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:49:09,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:49:09,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:49:09,402 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) [2023-01-27 22:49:09,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 22:49:09,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:49:09,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:49:09,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-27 22:49:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:49:09,758 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 [2023-01-27 22:49:09,797 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 [2023-01-27 22:49:09,834 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 [2023-01-27 22:49:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:49:10,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:49:11,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:49:11,848 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 243 treesize of output 159 [2023-01-27 22:49:11,936 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-01-27 22:49:11,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 990 [2023-01-27 22:49:11,964 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:49:11,965 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:49:11,967 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:49:11,968 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:49:11,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:49:11,971 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:49:12,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:49:12,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 340 treesize of output 378 [2023-01-27 22:49:12,096 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-01-27 22:49:12,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 323 [2023-01-27 22:49:17,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:49:17,473 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 243 treesize of output 159 [2023-01-27 22:49:17,506 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-27 22:49:17,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-01-27 22:49:17,562 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-27 22:49:17,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-01-27 22:49:17,618 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-27 22:49:17,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-01-27 22:49:17,806 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 22:49:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:49:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072132188] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:49:18,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:49:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-01-27 22:49:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82404865] [2023-01-27 22:49:18,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:49:18,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-27 22:49:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:49:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-27 22:49:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1734, Unknown=7, NotChecked=0, Total=2256 [2023-01-27 22:49:18,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-27 22:49:18,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 310 transitions, 5079 flow. Second operand has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 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) [2023-01-27 22:49:18,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:49:18,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-27 22:49:18,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:49:40,196 INFO L130 PetriNetUnfolder]: 7618/14277 cut-off events. [2023-01-27 22:49:40,196 INFO L131 PetriNetUnfolder]: For 130775/130775 co-relation queries the response was YES. [2023-01-27 22:49:40,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65587 conditions, 14277 events. 7618/14277 cut-off events. For 130775/130775 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 119197 event pairs, 1504 based on Foata normal form. 216/14493 useless extension candidates. Maximal degree in co-relation 65525. Up to 5684 conditions per place. [2023-01-27 22:49:40,262 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 551 selfloop transitions, 462 changer transitions 200/1213 dead transitions. [2023-01-27 22:49:40,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1213 transitions, 17979 flow [2023-01-27 22:49:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-01-27 22:49:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-01-27 22:49:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6608 transitions. [2023-01-27 22:49:40,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30249485008010984 [2023-01-27 22:49:40,268 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6608 transitions. [2023-01-27 22:49:40,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6608 transitions. [2023-01-27 22:49:40,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:49:40,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6608 transitions. [2023-01-27 22:49:40,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 77.74117647058823) internal successors, (6608), 85 states have internal predecessors, (6608), 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) [2023-01-27 22:49:40,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 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) [2023-01-27 22:49:40,286 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 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) [2023-01-27 22:49:40,286 INFO L175 Difference]: Start difference. First operand has 179 places, 310 transitions, 5079 flow. Second operand 85 states and 6608 transitions. [2023-01-27 22:49:40,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1213 transitions, 17979 flow [2023-01-27 22:49:40,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1213 transitions, 17196 flow, removed 356 selfloop flow, removed 13 redundant places. [2023-01-27 22:49:40,704 INFO L231 Difference]: Finished difference. Result has 297 places, 733 transitions, 13889 flow [2023-01-27 22:49:40,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4584, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=13889, PETRI_PLACES=297, PETRI_TRANSITIONS=733} [2023-01-27 22:49:40,704 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 277 predicate places. [2023-01-27 22:49:40,705 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 733 transitions, 13889 flow [2023-01-27 22:49:40,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 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) [2023-01-27 22:49:40,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:49:40,705 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:49:40,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 22:49:40,905 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 [2023-01-27 22:49:40,906 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:49:40,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:49:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash 630946832, now seen corresponding path program 13 times [2023-01-27 22:49:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:49:40,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346063927] [2023-01-27 22:49:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:49:40,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:49:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:49:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:49:42,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:49:42,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346063927] [2023-01-27 22:49:42,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346063927] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:49:42,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036939418] [2023-01-27 22:49:42,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:49:42,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:49:42,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:49:42,508 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) [2023-01-27 22:49:42,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 22:49:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:49:42,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 22:49:42,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:49:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:49:43,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:49:44,147 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-27 22:49:44,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-27 22:49:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:49:47,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036939418] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:49:47,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:49:47,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-27 22:49:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510037142] [2023-01-27 22:49:47,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:49:47,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-27 22:49:47,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:49:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-27 22:49:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2023-01-27 22:49:47,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-27 22:49:47,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 733 transitions, 13889 flow. Second operand has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 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) [2023-01-27 22:49:47,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:49:47,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-27 22:49:47,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:50:04,007 INFO L130 PetriNetUnfolder]: 15210/28176 cut-off events. [2023-01-27 22:50:04,007 INFO L131 PetriNetUnfolder]: For 678225/678225 co-relation queries the response was YES. [2023-01-27 22:50:04,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145091 conditions, 28176 events. 15210/28176 cut-off events. For 678225/678225 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 261643 event pairs, 3348 based on Foata normal form. 112/28288 useless extension candidates. Maximal degree in co-relation 144982. Up to 10616 conditions per place. [2023-01-27 22:50:04,266 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 948 selfloop transitions, 845 changer transitions 317/2110 dead transitions. [2023-01-27 22:50:04,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 2110 transitions, 36687 flow [2023-01-27 22:50:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-01-27 22:50:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-01-27 22:50:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 7410 transitions. [2023-01-27 22:50:04,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3035019455252918 [2023-01-27 22:50:04,272 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 7410 transitions. [2023-01-27 22:50:04,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 7410 transitions. [2023-01-27 22:50:04,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:50:04,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 7410 transitions. [2023-01-27 22:50:04,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 78.0) internal successors, (7410), 95 states have internal predecessors, (7410), 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) [2023-01-27 22:50:04,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 257.0) internal successors, (24672), 96 states have internal predecessors, (24672), 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) [2023-01-27 22:50:04,295 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 257.0) internal successors, (24672), 96 states have internal predecessors, (24672), 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) [2023-01-27 22:50:04,295 INFO L175 Difference]: Start difference. First operand has 297 places, 733 transitions, 13889 flow. Second operand 95 states and 7410 transitions. [2023-01-27 22:50:04,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 2110 transitions, 36687 flow [2023-01-27 22:50:07,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 2110 transitions, 33019 flow, removed 1805 selfloop flow, removed 15 redundant places. [2023-01-27 22:50:07,721 INFO L231 Difference]: Finished difference. Result has 426 places, 1479 transitions, 28687 flow [2023-01-27 22:50:07,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=11739, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=28687, PETRI_PLACES=426, PETRI_TRANSITIONS=1479} [2023-01-27 22:50:07,722 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 406 predicate places. [2023-01-27 22:50:07,722 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1479 transitions, 28687 flow [2023-01-27 22:50:07,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 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) [2023-01-27 22:50:07,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:50:07,722 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:50:07,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 22:50:07,922 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 [2023-01-27 22:50:07,923 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:50:07,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:50:07,923 INFO L85 PathProgramCache]: Analyzing trace with hash -988246562, now seen corresponding path program 14 times [2023-01-27 22:50:07,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:50:07,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691404239] [2023-01-27 22:50:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:50:07,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:50:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:50:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:50:09,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:50:09,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691404239] [2023-01-27 22:50:09,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691404239] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:50:09,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057511082] [2023-01-27 22:50:09,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:50:09,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:50:09,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:50:09,818 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) [2023-01-27 22:50:09,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 22:50:09,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:50:09,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:50:09,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-27 22:50:09,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:50:10,098 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 [2023-01-27 22:50:10,142 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 [2023-01-27 22:50:10,174 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 [2023-01-27 22:50:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:50:10,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:50:12,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:50:12,109 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 243 treesize of output 159 [2023-01-27 22:50:12,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:50:12,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 576 [2023-01-27 22:50:12,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:50:12,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 468 [2023-01-27 22:50:12,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:50:12,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 383 [2023-01-27 22:50:43,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:50:43,804 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 243 treesize of output 159 [2023-01-27 22:50:43,841 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-27 22:50:43,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-01-27 22:50:43,885 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-27 22:50:43,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-01-27 22:50:43,931 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-27 22:50:43,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-01-27 22:50:44,097 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 22:50:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:50:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057511082] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:50:44,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:50:44,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-01-27 22:50:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24934609] [2023-01-27 22:50:44,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:50:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-01-27 22:50:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:50:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-01-27 22:50:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1930, Unknown=5, NotChecked=0, Total=2352 [2023-01-27 22:50:44,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-27 22:50:44,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1479 transitions, 28687 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 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) [2023-01-27 22:50:44,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:50:44,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-27 22:50:44,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:09,601 INFO L130 PetriNetUnfolder]: 19666/36666 cut-off events. [2023-01-27 22:51:09,601 INFO L131 PetriNetUnfolder]: For 1941337/1941337 co-relation queries the response was YES. [2023-01-27 22:51:10,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213725 conditions, 36666 events. 19666/36666 cut-off events. For 1941337/1941337 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 351581 event pairs, 5308 based on Foata normal form. 404/37070 useless extension candidates. Maximal degree in co-relation 213566. Up to 15462 conditions per place. [2023-01-27 22:51:10,240 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 1381 selfloop transitions, 904 changer transitions 229/2514 dead transitions. [2023-01-27 22:51:10,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 2514 transitions, 52647 flow [2023-01-27 22:51:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-01-27 22:51:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-01-27 22:51:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 5974 transitions. [2023-01-27 22:51:10,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3018848855424731 [2023-01-27 22:51:10,245 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 5974 transitions. [2023-01-27 22:51:10,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 5974 transitions. [2023-01-27 22:51:10,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:10,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 5974 transitions. [2023-01-27 22:51:10,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 77.58441558441558) internal successors, (5974), 77 states have internal predecessors, (5974), 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) [2023-01-27 22:51:10,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 257.0) internal successors, (20046), 78 states have internal predecessors, (20046), 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) [2023-01-27 22:51:10,262 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 257.0) internal successors, (20046), 78 states have internal predecessors, (20046), 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) [2023-01-27 22:51:10,262 INFO L175 Difference]: Start difference. First operand has 426 places, 1479 transitions, 28687 flow. Second operand 77 states and 5974 transitions. [2023-01-27 22:51:10,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 2514 transitions, 52647 flow [2023-01-27 22:51:20,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2514 transitions, 41521 flow, removed 5532 selfloop flow, removed 16 redundant places. [2023-01-27 22:51:20,708 INFO L231 Difference]: Finished difference. Result has 519 places, 1751 transitions, 32210 flow [2023-01-27 22:51:20,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=19046, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=32210, PETRI_PLACES=519, PETRI_TRANSITIONS=1751} [2023-01-27 22:51:20,709 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 499 predicate places. [2023-01-27 22:51:20,709 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1751 transitions, 32210 flow [2023-01-27 22:51:20,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 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) [2023-01-27 22:51:20,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:20,709 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:20,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:20,913 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 [2023-01-27 22:51:20,914 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:51:20,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash -349342824, now seen corresponding path program 15 times [2023-01-27 22:51:20,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:20,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081357424] [2023-01-27 22:51:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:20,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081357424] [2023-01-27 22:51:22,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081357424] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318191832] [2023-01-27 22:51:22,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:51:22,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:22,231 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) [2023-01-27 22:51:22,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 22:51:22,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 22:51:22,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:22,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-27 22:51:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:23,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:24,157 INFO L321 Elim1Store]: treesize reduction 82, result has 54.7 percent of original size [2023-01-27 22:51:24,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 328 treesize of output 272 [2023-01-27 22:51:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:25,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318191832] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:25,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:25,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-27 22:51:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771910380] [2023-01-27 22:51:25,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:25,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-27 22:51:25,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:25,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-27 22:51:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2023-01-27 22:51:25,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:51:25,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1751 transitions, 32210 flow. Second operand has 46 states, 46 states have (on average 78.5) internal successors, (3611), 46 states have internal predecessors, (3611), 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) [2023-01-27 22:51:25,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:25,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:51:25,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:53,954 INFO L130 PetriNetUnfolder]: 20662/38461 cut-off events. [2023-01-27 22:51:53,954 INFO L131 PetriNetUnfolder]: For 2805714/2805714 co-relation queries the response was YES. [2023-01-27 22:51:54,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220486 conditions, 38461 events. 20662/38461 cut-off events. For 2805714/2805714 co-relation queries the response was YES. Maximal size of possible extension queue 2027. Compared 368011 event pairs, 6602 based on Foata normal form. 205/38666 useless extension candidates. Maximal degree in co-relation 220284. Up to 27399 conditions per place. [2023-01-27 22:51:54,889 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 1680 selfloop transitions, 590 changer transitions 262/2532 dead transitions. [2023-01-27 22:51:54,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 2532 transitions, 53550 flow [2023-01-27 22:51:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-01-27 22:51:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2023-01-27 22:51:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 8802 transitions. [2023-01-27 22:51:54,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332514827547127 [2023-01-27 22:51:54,895 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 8802 transitions. [2023-01-27 22:51:54,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 8802 transitions. [2023-01-27 22:51:54,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:54,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 8802 transitions. [2023-01-27 22:51:54,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 85.45631067961165) internal successors, (8802), 103 states have internal predecessors, (8802), 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) [2023-01-27 22:51:54,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 257.0) internal successors, (26728), 104 states have internal predecessors, (26728), 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) [2023-01-27 22:51:54,918 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 257.0) internal successors, (26728), 104 states have internal predecessors, (26728), 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) [2023-01-27 22:51:54,919 INFO L175 Difference]: Start difference. First operand has 519 places, 1751 transitions, 32210 flow. Second operand 103 states and 8802 transitions. [2023-01-27 22:51:54,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 2532 transitions, 53550 flow [2023-01-27 22:52:13,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 2532 transitions, 51031 flow, removed 1216 selfloop flow, removed 32 redundant places. [2023-01-27 22:52:13,871 INFO L231 Difference]: Finished difference. Result has 638 places, 1881 transitions, 37814 flow [2023-01-27 22:52:13,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=26631, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=37814, PETRI_PLACES=638, PETRI_TRANSITIONS=1881} [2023-01-27 22:52:13,873 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 618 predicate places. [2023-01-27 22:52:13,873 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 1881 transitions, 37814 flow [2023-01-27 22:52:13,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 78.5) internal successors, (3611), 46 states have internal predecessors, (3611), 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) [2023-01-27 22:52:13,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:52:13,873 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:52:13,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 22:52:14,078 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 [2023-01-27 22:52:14,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:52:14,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:52:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash 527195898, now seen corresponding path program 16 times [2023-01-27 22:52:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:52:14,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112981873] [2023-01-27 22:52:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:52:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:52:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:15,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:52:15,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112981873] [2023-01-27 22:52:15,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112981873] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:52:15,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048951395] [2023-01-27 22:52:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:52:15,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:52:15,763 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) [2023-01-27 22:52:15,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 22:52:15,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:52:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:52:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 22:52:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:52:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:16,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:52:17,288 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-27 22:52:17,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-27 22:52:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:20,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048951395] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:52:20,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:52:20,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-27 22:52:20,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459874790] [2023-01-27 22:52:20,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:52:20,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-27 22:52:20,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:52:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-27 22:52:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2023-01-27 22:52:20,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-27 22:52:20,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 1881 transitions, 37814 flow. Second operand has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 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) [2023-01-27 22:52:20,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:52:20,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-27 22:52:20,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:58,144 INFO L130 PetriNetUnfolder]: 27522/50921 cut-off events. [2023-01-27 22:52:58,144 INFO L131 PetriNetUnfolder]: For 5746050/5746050 co-relation queries the response was YES. [2023-01-27 22:52:59,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301812 conditions, 50921 events. 27522/50921 cut-off events. For 5746050/5746050 co-relation queries the response was YES. Maximal size of possible extension queue 2568. Compared 502679 event pairs, 11066 based on Foata normal form. 74/50995 useless extension candidates. Maximal degree in co-relation 301558. Up to 36072 conditions per place. [2023-01-27 22:53:00,003 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2196 selfloop transitions, 616 changer transitions 260/3072 dead transitions. [2023-01-27 22:53:00,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 3072 transitions, 61273 flow [2023-01-27 22:53:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-01-27 22:53:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-01-27 22:53:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6613 transitions. [2023-01-27 22:53:00,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3027237354085603 [2023-01-27 22:53:00,009 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6613 transitions. [2023-01-27 22:53:00,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6613 transitions. [2023-01-27 22:53:00,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:53:00,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6613 transitions. [2023-01-27 22:53:00,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 77.8) internal successors, (6613), 85 states have internal predecessors, (6613), 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) [2023-01-27 22:53:00,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 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) [2023-01-27 22:53:00,026 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 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) [2023-01-27 22:53:00,026 INFO L175 Difference]: Start difference. First operand has 638 places, 1881 transitions, 37814 flow. Second operand 85 states and 6613 transitions. [2023-01-27 22:53:00,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 3072 transitions, 61273 flow [2023-01-27 22:53:40,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 685 places, 3072 transitions, 56632 flow, removed 2289 selfloop flow, removed 25 redundant places. [2023-01-27 22:53:40,118 INFO L231 Difference]: Finished difference. Result has 720 places, 2370 transitions, 44708 flow [2023-01-27 22:53:40,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=33699, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=44708, PETRI_PLACES=720, PETRI_TRANSITIONS=2370} [2023-01-27 22:53:40,120 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 700 predicate places. [2023-01-27 22:53:40,120 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 2370 transitions, 44708 flow [2023-01-27 22:53:40,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 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) [2023-01-27 22:53:40,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:53:40,121 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:53:40,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-01-27 22:53:40,325 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 [2023-01-27 22:53:40,325 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:53:40,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:53:40,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1851597076, now seen corresponding path program 17 times [2023-01-27 22:53:40,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:53:40,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176347498] [2023-01-27 22:53:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:53:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:53:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:41,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:53:41,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176347498] [2023-01-27 22:53:41,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176347498] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:53:41,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430832812] [2023-01-27 22:53:41,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:53:41,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:41,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:53:41,682 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) [2023-01-27 22:53:41,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 22:53:41,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:53:41,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:53:41,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 22:53:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:53:42,301 INFO L321 Elim1Store]: treesize reduction 142, result has 8.4 percent of original size [2023-01-27 22:53:42,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 36 [2023-01-27 22:53:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:53:42,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:53:43,328 INFO L321 Elim1Store]: treesize reduction 82, result has 54.7 percent of original size [2023-01-27 22:53:43,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 318 treesize of output 262 [2023-01-27 22:53:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:53:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430832812] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:53:44,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:53:44,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 35 [2023-01-27 22:53:44,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248839130] [2023-01-27 22:53:44,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:53:44,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 22:53:44,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:53:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 22:53:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2023-01-27 22:53:44,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:53:44,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 2370 transitions, 44708 flow. Second operand has 37 states, 37 states have (on average 78.78378378378379) internal successors, (2915), 37 states have internal predecessors, (2915), 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) [2023-01-27 22:53:44,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:53:44,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:53:44,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:54:31,956 INFO L130 PetriNetUnfolder]: 34000/62896 cut-off events. [2023-01-27 22:54:31,956 INFO L131 PetriNetUnfolder]: For 7292580/7292580 co-relation queries the response was YES. [2023-01-27 22:54:34,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369644 conditions, 62896 events. 34000/62896 cut-off events. For 7292580/7292580 co-relation queries the response was YES. Maximal size of possible extension queue 3402. Compared 643809 event pairs, 10596 based on Foata normal form. 216/63112 useless extension candidates. Maximal degree in co-relation 369371. Up to 45042 conditions per place. [2023-01-27 22:54:34,438 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2267 selfloop transitions, 920 changer transitions 191/3378 dead transitions. [2023-01-27 22:54:34,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 3378 transitions, 70256 flow [2023-01-27 22:54:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-01-27 22:54:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-01-27 22:54:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5612 transitions. [2023-01-27 22:54:34,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33085721023464215 [2023-01-27 22:54:34,442 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5612 transitions. [2023-01-27 22:54:34,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5612 transitions. [2023-01-27 22:54:34,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:54:34,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5612 transitions. [2023-01-27 22:54:34,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 85.03030303030303) internal successors, (5612), 66 states have internal predecessors, (5612), 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) [2023-01-27 22:54:34,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 257.0) internal successors, (17219), 67 states have internal predecessors, (17219), 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) [2023-01-27 22:54:34,454 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 257.0) internal successors, (17219), 67 states have internal predecessors, (17219), 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) [2023-01-27 22:54:34,454 INFO L175 Difference]: Start difference. First operand has 720 places, 2370 transitions, 44708 flow. Second operand 66 states and 5612 transitions. [2023-01-27 22:54:34,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 3378 transitions, 70256 flow [2023-01-27 22:55:41,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 3378 transitions, 68724 flow, removed 746 selfloop flow, removed 15 redundant places. [2023-01-27 22:55:41,080 INFO L231 Difference]: Finished difference. Result has 808 places, 2967 transitions, 59533 flow [2023-01-27 22:55:41,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=43238, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=59533, PETRI_PLACES=808, PETRI_TRANSITIONS=2967} [2023-01-27 22:55:41,082 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 788 predicate places. [2023-01-27 22:55:41,082 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 2967 transitions, 59533 flow [2023-01-27 22:55:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 78.78378378378379) internal successors, (2915), 37 states have internal predecessors, (2915), 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) [2023-01-27 22:55:41,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:55:41,082 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:55:41,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 22:55:41,282 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 [2023-01-27 22:55:41,283 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:55:41,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:55:41,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1542947051, now seen corresponding path program 18 times [2023-01-27 22:55:41,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:55:41,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941101322] [2023-01-27 22:55:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:55:41,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:55:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:55:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:55:41,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:55:41,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941101322] [2023-01-27 22:55:41,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941101322] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:55:41,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165386247] [2023-01-27 22:55:41,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:55:41,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:55:41,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:55:41,461 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) [2023-01-27 22:55:41,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 22:55:41,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 22:55:41,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:55:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 22:55:41,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:55:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:55:41,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:55:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:55:42,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165386247] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:55:42,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:55:42,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-27 22:55:42,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016376708] [2023-01-27 22:55:42,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:55:42,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 22:55:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:55:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 22:55:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 22:55:42,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 257 [2023-01-27 22:55:42,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 2967 transitions, 59533 flow. Second operand has 35 states, 35 states have (on average 94.68571428571428) internal successors, (3314), 35 states have internal predecessors, (3314), 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) [2023-01-27 22:55:42,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:55:42,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 257 [2023-01-27 22:55:42,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:56:01,450 INFO L130 PetriNetUnfolder]: 12580/24011 cut-off events. [2023-01-27 22:56:01,450 INFO L131 PetriNetUnfolder]: For 1635197/1635203 co-relation queries the response was YES. [2023-01-27 22:56:01,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140535 conditions, 24011 events. 12580/24011 cut-off events. For 1635197/1635203 co-relation queries the response was YES. Maximal size of possible extension queue 1659. Compared 228343 event pairs, 4090 based on Foata normal form. 920/24915 useless extension candidates. Maximal degree in co-relation 140224. Up to 14116 conditions per place. [2023-01-27 22:56:01,814 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 758 selfloop transitions, 38 changer transitions 352/1154 dead transitions. [2023-01-27 22:56:01,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 1154 transitions, 28097 flow [2023-01-27 22:56:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 22:56:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 22:56:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1483 transitions. [2023-01-27 22:56:01,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3846952010376135 [2023-01-27 22:56:01,816 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1483 transitions. [2023-01-27 22:56:01,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1483 transitions. [2023-01-27 22:56:01,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:56:01,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1483 transitions. [2023-01-27 22:56:01,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 98.86666666666666) internal successors, (1483), 15 states have internal predecessors, (1483), 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) [2023-01-27 22:56:01,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 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) [2023-01-27 22:56:01,819 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 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) [2023-01-27 22:56:01,819 INFO L175 Difference]: Start difference. First operand has 808 places, 2967 transitions, 59533 flow. Second operand 15 states and 1483 transitions. [2023-01-27 22:56:01,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 1154 transitions, 28097 flow [2023-01-27 22:56:20,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1154 transitions, 25372 flow, removed 1117 selfloop flow, removed 109 redundant places. [2023-01-27 22:56:20,828 INFO L231 Difference]: Finished difference. Result has 636 places, 777 transitions, 16666 flow [2023-01-27 22:56:20,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=22078, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16666, PETRI_PLACES=636, PETRI_TRANSITIONS=777} [2023-01-27 22:56:20,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 616 predicate places. [2023-01-27 22:56:20,829 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 777 transitions, 16666 flow [2023-01-27 22:56:20,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 94.68571428571428) internal successors, (3314), 35 states have internal predecessors, (3314), 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) [2023-01-27 22:56:20,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:56:20,830 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:56:20,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 22:56:21,030 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 [2023-01-27 22:56:21,030 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:56:21,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:56:21,030 INFO L85 PathProgramCache]: Analyzing trace with hash 469619336, now seen corresponding path program 19 times [2023-01-27 22:56:21,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:56:21,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034465666] [2023-01-27 22:56:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:56:21,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:56:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:56:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:56:23,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:56:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034465666] [2023-01-27 22:56:23,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034465666] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:56:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75630069] [2023-01-27 22:56:23,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:56:23,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:56:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:56:23,222 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) [2023-01-27 22:56:23,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 22:56:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:56:23,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 22:56:23,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:56:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:56:23,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:56:24,557 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-27 22:56:24,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 310 [2023-01-27 22:56:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 22:56:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75630069] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:56:27,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:56:27,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 9] total 39 [2023-01-27 22:56:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557401536] [2023-01-27 22:56:27,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:56:27,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 22:56:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:56:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 22:56:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 22:56:27,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:56:27,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 777 transitions, 16666 flow. Second operand has 41 states, 41 states have (on average 78.6829268292683) internal successors, (3226), 41 states have internal predecessors, (3226), 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) [2023-01-27 22:56:27,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:56:27,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:56:27,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:56:40,396 INFO L130 PetriNetUnfolder]: 12760/23564 cut-off events. [2023-01-27 22:56:40,396 INFO L131 PetriNetUnfolder]: For 1899005/1899005 co-relation queries the response was YES. [2023-01-27 22:56:40,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140022 conditions, 23564 events. 12760/23564 cut-off events. For 1899005/1899005 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 212762 event pairs, 2499 based on Foata normal form. 147/23711 useless extension candidates. Maximal degree in co-relation 139778. Up to 8636 conditions per place. [2023-01-27 22:56:40,724 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 649 selfloop transitions, 695 changer transitions 237/1581 dead transitions. [2023-01-27 22:56:40,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1581 transitions, 32962 flow [2023-01-27 22:56:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-27 22:56:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-27 22:56:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5521 transitions. [2023-01-27 22:56:40,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3304998503442083 [2023-01-27 22:56:40,728 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5521 transitions. [2023-01-27 22:56:40,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5521 transitions. [2023-01-27 22:56:40,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:56:40,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5521 transitions. [2023-01-27 22:56:40,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 84.93846153846154) internal successors, (5521), 65 states have internal predecessors, (5521), 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) [2023-01-27 22:56:40,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 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) [2023-01-27 22:56:40,739 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 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) [2023-01-27 22:56:40,739 INFO L175 Difference]: Start difference. First operand has 636 places, 777 transitions, 16666 flow. Second operand 65 states and 5521 transitions. [2023-01-27 22:56:40,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1581 transitions, 32962 flow [2023-01-27 22:56:48,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1581 transitions, 31012 flow, removed 685 selfloop flow, removed 148 redundant places. [2023-01-27 22:56:48,377 INFO L231 Difference]: Finished difference. Result has 464 places, 1150 transitions, 28110 flow [2023-01-27 22:56:48,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=15548, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=28110, PETRI_PLACES=464, PETRI_TRANSITIONS=1150} [2023-01-27 22:56:48,377 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 444 predicate places. [2023-01-27 22:56:48,377 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1150 transitions, 28110 flow [2023-01-27 22:56:48,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 78.6829268292683) internal successors, (3226), 41 states have internal predecessors, (3226), 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) [2023-01-27 22:56:48,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:56:48,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:56:48,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 22:56:48,578 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 [2023-01-27 22:56:48,578 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:56:48,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:56:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1168651819, now seen corresponding path program 20 times [2023-01-27 22:56:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:56:48,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881393248] [2023-01-27 22:56:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:56:48,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:56:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:56:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:56:49,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:56:49,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881393248] [2023-01-27 22:56:49,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881393248] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:56:49,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199768445] [2023-01-27 22:56:49,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:56:49,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:56:49,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:56:49,968 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) [2023-01-27 22:56:49,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 22:56:50,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:56:50,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:56:50,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 22:56:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:56:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:56:50,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:56:51,873 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-27 22:56:51,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-27 22:56:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:56:53,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199768445] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:56:53,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:56:53,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 50 [2023-01-27 22:56:53,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985220863] [2023-01-27 22:56:53,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:56:53,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-27 22:56:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:56:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-27 22:56:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=2195, Unknown=0, NotChecked=0, Total=2652 [2023-01-27 22:56:53,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:56:53,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1150 transitions, 28110 flow. Second operand has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 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) [2023-01-27 22:56:53,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:56:53,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:56:53,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:57:52,232 INFO L130 PetriNetUnfolder]: 31092/57037 cut-off events. [2023-01-27 22:57:52,232 INFO L131 PetriNetUnfolder]: For 3935594/3935594 co-relation queries the response was YES. [2023-01-27 22:57:53,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474471 conditions, 57037 events. 31092/57037 cut-off events. For 3935594/3935594 co-relation queries the response was YES. Maximal size of possible extension queue 2602. Compared 559275 event pairs, 5003 based on Foata normal form. 206/57243 useless extension candidates. Maximal degree in co-relation 474280. Up to 18141 conditions per place. [2023-01-27 22:57:53,615 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2151 selfloop transitions, 1873 changer transitions 967/4991 dead transitions. [2023-01-27 22:57:53,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 4991 transitions, 129067 flow [2023-01-27 22:57:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2023-01-27 22:57:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2023-01-27 22:57:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 29813 transitions. [2023-01-27 22:57:53,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33334451451317143 [2023-01-27 22:57:53,631 INFO L72 ComplementDD]: Start complementDD. Operand 348 states and 29813 transitions. [2023-01-27 22:57:53,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 348 states and 29813 transitions. [2023-01-27 22:57:53,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:57:53,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 348 states and 29813 transitions. [2023-01-27 22:57:53,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 349 states, 348 states have (on average 85.66954022988506) internal successors, (29813), 348 states have internal predecessors, (29813), 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) [2023-01-27 22:57:53,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 349 states, 349 states have (on average 257.0) internal successors, (89693), 349 states have internal predecessors, (89693), 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) [2023-01-27 22:57:53,712 INFO L81 ComplementDD]: Finished complementDD. Result has 349 states, 349 states have (on average 257.0) internal successors, (89693), 349 states have internal predecessors, (89693), 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) [2023-01-27 22:57:53,712 INFO L175 Difference]: Start difference. First operand has 464 places, 1150 transitions, 28110 flow. Second operand 348 states and 29813 transitions. [2023-01-27 22:57:53,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 4991 transitions, 129067 flow [2023-01-27 22:58:14,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 4991 transitions, 120475 flow, removed 4152 selfloop flow, removed 16 redundant places. [2023-01-27 22:58:14,275 INFO L231 Difference]: Finished difference. Result has 997 places, 2784 transitions, 90394 flow [2023-01-27 22:58:14,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25428, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=348, PETRI_FLOW=90394, PETRI_PLACES=997, PETRI_TRANSITIONS=2784} [2023-01-27 22:58:14,277 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 977 predicate places. [2023-01-27 22:58:14,277 INFO L495 AbstractCegarLoop]: Abstraction has has 997 places, 2784 transitions, 90394 flow [2023-01-27 22:58:14,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 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) [2023-01-27 22:58:14,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:58:14,278 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:58:14,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 22:58:14,482 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 [2023-01-27 22:58:14,483 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:58:14,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:58:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash -678070836, now seen corresponding path program 21 times [2023-01-27 22:58:14,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:58:14,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105971737] [2023-01-27 22:58:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:58:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:58:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:58:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-27 22:58:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:58:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105971737] [2023-01-27 22:58:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105971737] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:58:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841785138] [2023-01-27 22:58:14,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:58:14,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:58:14,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:58:14,670 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) [2023-01-27 22:58:14,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 22:58:14,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 22:58:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:58:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 22:58:14,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:58:16,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:58:16,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 682 treesize of output 380 [2023-01-27 22:58:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 22:58:16,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:58:17,166 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-01-27 22:58:17,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 752 treesize of output 452 [2023-01-27 22:58:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 22:58:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841785138] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:58:17,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:58:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-01-27 22:58:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083043033] [2023-01-27 22:58:17,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:58:17,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 22:58:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:58:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 22:58:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 22:58:17,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 257 [2023-01-27 22:58:17,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 2784 transitions, 90394 flow. Second operand has 33 states, 33 states have (on average 88.63636363636364) internal successors, (2925), 33 states have internal predecessors, (2925), 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) [2023-01-27 22:58:17,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:58:17,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 257 [2023-01-27 22:58:17,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:58:40,950 INFO L130 PetriNetUnfolder]: 13206/24917 cut-off events. [2023-01-27 22:58:40,950 INFO L131 PetriNetUnfolder]: For 3591597/3591603 co-relation queries the response was YES. [2023-01-27 22:58:41,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163846 conditions, 24917 events. 13206/24917 cut-off events. For 3591597/3591603 co-relation queries the response was YES. Maximal size of possible extension queue 1472. Compared 232265 event pairs, 8529 based on Foata normal form. 642/25539 useless extension candidates. Maximal degree in co-relation 163455. Up to 20452 conditions per place. [2023-01-27 22:58:41,526 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 1094 selfloop transitions, 63 changer transitions 93/1256 dead transitions. [2023-01-27 22:58:41,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1256 transitions, 32209 flow [2023-01-27 22:58:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:58:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:58:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1767 transitions. [2023-01-27 22:58:41,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36186770428015563 [2023-01-27 22:58:41,528 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1767 transitions. [2023-01-27 22:58:41,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1767 transitions. [2023-01-27 22:58:41,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:58:41,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1767 transitions. [2023-01-27 22:58:41,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.0) internal successors, (1767), 19 states have internal predecessors, (1767), 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) [2023-01-27 22:58:41,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 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) [2023-01-27 22:58:41,532 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 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) [2023-01-27 22:58:41,532 INFO L175 Difference]: Start difference. First operand has 997 places, 2784 transitions, 90394 flow. Second operand 19 states and 1767 transitions. [2023-01-27 22:58:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1256 transitions, 32209 flow [2023-01-27 22:59:00,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1256 transitions, 30200 flow, removed 916 selfloop flow, removed 202 redundant places. [2023-01-27 22:59:00,188 INFO L231 Difference]: Finished difference. Result has 505 places, 1104 transitions, 25965 flow [2023-01-27 22:59:00,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25866, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=25965, PETRI_PLACES=505, PETRI_TRANSITIONS=1104} [2023-01-27 22:59:00,189 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 485 predicate places. [2023-01-27 22:59:00,189 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1104 transitions, 25965 flow [2023-01-27 22:59:00,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.63636363636364) internal successors, (2925), 33 states have internal predecessors, (2925), 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) [2023-01-27 22:59:00,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:59:00,189 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:59:00,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 22:59:00,392 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 [2023-01-27 22:59:00,393 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:59:00,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:59:00,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1274363683, now seen corresponding path program 22 times [2023-01-27 22:59:00,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:59:00,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716822151] [2023-01-27 22:59:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:59:00,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:59:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:59:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:59:01,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:59:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716822151] [2023-01-27 22:59:01,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716822151] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:59:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955491289] [2023-01-27 22:59:01,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:59:01,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:59:01,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:59:01,766 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) [2023-01-27 22:59:01,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 22:59:01,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:59:01,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:59:01,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-27 22:59:01,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:59:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-01-27 22:59:02,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:59:03,043 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-27 22:59:03,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 310 [2023-01-27 22:59:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-01-27 22:59:05,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955491289] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:59:05,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:59:05,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 37 [2023-01-27 22:59:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467195280] [2023-01-27 22:59:05,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:59:05,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 22:59:05,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:59:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 22:59:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2023-01-27 22:59:05,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:59:05,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1104 transitions, 25965 flow. Second operand has 39 states, 39 states have (on average 78.76923076923077) internal successors, (3072), 39 states have internal predecessors, (3072), 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) [2023-01-27 22:59:05,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:59:05,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:59:05,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:59:21,063 INFO L130 PetriNetUnfolder]: 14569/27236 cut-off events. [2023-01-27 22:59:21,063 INFO L131 PetriNetUnfolder]: For 946370/946370 co-relation queries the response was YES. [2023-01-27 22:59:21,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166230 conditions, 27236 events. 14569/27236 cut-off events. For 946370/946370 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 252823 event pairs, 3064 based on Foata normal form. 28/27264 useless extension candidates. Maximal degree in co-relation 166020. Up to 11072 conditions per place. [2023-01-27 22:59:21,425 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 725 selfloop transitions, 718 changer transitions 294/1737 dead transitions. [2023-01-27 22:59:21,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1737 transitions, 37302 flow [2023-01-27 22:59:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-01-27 22:59:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-01-27 22:59:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6325 transitions. [2023-01-27 22:59:21,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32814526588845655 [2023-01-27 22:59:21,431 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6325 transitions. [2023-01-27 22:59:21,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6325 transitions. [2023-01-27 22:59:21,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:59:21,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6325 transitions. [2023-01-27 22:59:21,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 84.33333333333333) internal successors, (6325), 75 states have internal predecessors, (6325), 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) [2023-01-27 22:59:21,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 257.0) internal successors, (19532), 76 states have internal predecessors, (19532), 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) [2023-01-27 22:59:21,448 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 257.0) internal successors, (19532), 76 states have internal predecessors, (19532), 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) [2023-01-27 22:59:21,448 INFO L175 Difference]: Start difference. First operand has 505 places, 1104 transitions, 25965 flow. Second operand 75 states and 6325 transitions. [2023-01-27 22:59:21,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1737 transitions, 37302 flow [2023-01-27 22:59:30,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1737 transitions, 36612 flow, removed 305 selfloop flow, removed 30 redundant places. [2023-01-27 22:59:30,340 INFO L231 Difference]: Finished difference. Result has 546 places, 1244 transitions, 31584 flow [2023-01-27 22:59:30,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25564, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=31584, PETRI_PLACES=546, PETRI_TRANSITIONS=1244} [2023-01-27 22:59:30,341 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 526 predicate places. [2023-01-27 22:59:30,341 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 1244 transitions, 31584 flow [2023-01-27 22:59:30,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.76923076923077) internal successors, (3072), 39 states have internal predecessors, (3072), 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) [2023-01-27 22:59:30,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:59:30,342 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:59:30,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-01-27 22:59:30,543 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 [2023-01-27 22:59:30,543 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:59:30,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:59:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash -609610603, now seen corresponding path program 23 times [2023-01-27 22:59:30,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:59:30,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669898388] [2023-01-27 22:59:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:59:30,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:59:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:59:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:59:31,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:59:31,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669898388] [2023-01-27 22:59:31,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669898388] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:59:31,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319454949] [2023-01-27 22:59:31,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:59:31,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:59:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:59:31,838 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) [2023-01-27 22:59:31,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 22:59:31,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 22:59:31,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:59:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-27 22:59:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:59:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:59:32,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:59:33,693 INFO L321 Elim1Store]: treesize reduction 38, result has 79.0 percent of original size [2023-01-27 22:59:33,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 320 [2023-01-27 22:59:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:59:36,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319454949] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:59:36,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:59:36,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 50 [2023-01-27 22:59:36,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341861437] [2023-01-27 22:59:36,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:59:36,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-27 22:59:36,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:59:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-27 22:59:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2023-01-27 22:59:36,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 22:59:36,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1244 transitions, 31584 flow. Second operand has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 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) [2023-01-27 22:59:36,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:59:36,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 22:59:36,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:59:54,099 INFO L130 PetriNetUnfolder]: 14999/27991 cut-off events. [2023-01-27 22:59:54,100 INFO L131 PetriNetUnfolder]: For 889107/889107 co-relation queries the response was YES. [2023-01-27 22:59:54,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179787 conditions, 27991 events. 14999/27991 cut-off events. For 889107/889107 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 263028 event pairs, 5664 based on Foata normal form. 11/28002 useless extension candidates. Maximal degree in co-relation 179580. Up to 21972 conditions per place. [2023-01-27 22:59:54,596 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 1157 selfloop transitions, 251 changer transitions 248/1656 dead transitions. [2023-01-27 22:59:54,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 1656 transitions, 38392 flow [2023-01-27 22:59:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-27 22:59:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-27 22:59:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5458 transitions. [2023-01-27 22:59:54,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32672852439389405 [2023-01-27 22:59:54,599 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5458 transitions. [2023-01-27 22:59:54,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5458 transitions. [2023-01-27 22:59:54,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:59:54,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5458 transitions. [2023-01-27 22:59:54,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 83.96923076923076) internal successors, (5458), 65 states have internal predecessors, (5458), 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) [2023-01-27 22:59:54,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 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) [2023-01-27 22:59:54,610 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 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) [2023-01-27 22:59:54,610 INFO L175 Difference]: Start difference. First operand has 546 places, 1244 transitions, 31584 flow. Second operand 65 states and 5458 transitions. [2023-01-27 22:59:54,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 1656 transitions, 38392 flow [2023-01-27 23:00:05,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1656 transitions, 36822 flow, removed 605 selfloop flow, removed 41 redundant places. [2023-01-27 23:00:05,618 INFO L231 Difference]: Finished difference. Result has 577 places, 1283 transitions, 31892 flow [2023-01-27 23:00:05,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=30016, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=31892, PETRI_PLACES=577, PETRI_TRANSITIONS=1283} [2023-01-27 23:00:05,619 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 557 predicate places. [2023-01-27 23:00:05,619 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 1283 transitions, 31892 flow [2023-01-27 23:00:05,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 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) [2023-01-27 23:00:05,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:00:05,619 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:00:05,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 23:00:05,826 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 [2023-01-27 23:00:05,827 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:00:05,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:00:05,827 INFO L85 PathProgramCache]: Analyzing trace with hash 495799907, now seen corresponding path program 24 times [2023-01-27 23:00:05,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:00:05,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538002325] [2023-01-27 23:00:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:00:05,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:00:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:00:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:00:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:00:05,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538002325] [2023-01-27 23:00:05,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538002325] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:00:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109580074] [2023-01-27 23:00:05,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:00:05,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:00:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:00:05,977 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) [2023-01-27 23:00:05,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 23:00:06,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 23:00:06,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:00:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:00:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:00:06,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:00:06,493 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 362 treesize of output 204 [2023-01-27 23:00:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:00:06,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:00:06,990 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-01-27 23:00:06,991 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 424 treesize of output 268 [2023-01-27 23:00:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:00:07,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109580074] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:00:07,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:00:07,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 19 [2023-01-27 23:00:07,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052255410] [2023-01-27 23:00:07,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:00:07,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:00:07,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:00:07,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:00:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-01-27 23:00:07,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 257 [2023-01-27 23:00:07,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 1283 transitions, 31892 flow. Second operand has 20 states, 20 states have (on average 96.3) internal successors, (1926), 20 states have internal predecessors, (1926), 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) [2023-01-27 23:00:07,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:00:07,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 257 [2023-01-27 23:00:07,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:00:24,166 INFO L130 PetriNetUnfolder]: 19959/37004 cut-off events. [2023-01-27 23:00:24,166 INFO L131 PetriNetUnfolder]: For 1377953/1377953 co-relation queries the response was YES. [2023-01-27 23:00:24,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252319 conditions, 37004 events. 19959/37004 cut-off events. For 1377953/1377953 co-relation queries the response was YES. Maximal size of possible extension queue 2312. Compared 356429 event pairs, 3468 based on Foata normal form. 44/37048 useless extension candidates. Maximal degree in co-relation 252104. Up to 13031 conditions per place. [2023-01-27 23:00:24,976 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 635 selfloop transitions, 1160 changer transitions 5/1800 dead transitions. [2023-01-27 23:00:24,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1800 transitions, 50074 flow [2023-01-27 23:00:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 23:00:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 23:00:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1747 transitions. [2023-01-27 23:00:24,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39986266880292975 [2023-01-27 23:00:24,978 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1747 transitions. [2023-01-27 23:00:24,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1747 transitions. [2023-01-27 23:00:24,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:00:24,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1747 transitions. [2023-01-27 23:00:24,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 102.76470588235294) internal successors, (1747), 17 states have internal predecessors, (1747), 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) [2023-01-27 23:00:24,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 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) [2023-01-27 23:00:24,981 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 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) [2023-01-27 23:00:24,981 INFO L175 Difference]: Start difference. First operand has 577 places, 1283 transitions, 31892 flow. Second operand 17 states and 1747 transitions. [2023-01-27 23:00:24,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1800 transitions, 50074 flow [2023-01-27 23:00:38,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1800 transitions, 49195 flow, removed 327 selfloop flow, removed 39 redundant places. [2023-01-27 23:00:38,501 INFO L231 Difference]: Finished difference. Result has 550 places, 1696 transitions, 46465 flow [2023-01-27 23:00:38,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=31152, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=46465, PETRI_PLACES=550, PETRI_TRANSITIONS=1696} [2023-01-27 23:00:38,502 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 530 predicate places. [2023-01-27 23:00:38,502 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1696 transitions, 46465 flow [2023-01-27 23:00:38,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.3) internal successors, (1926), 20 states have internal predecessors, (1926), 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) [2023-01-27 23:00:38,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:00:38,503 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:00:38,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 23:00:38,703 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 [2023-01-27 23:00:38,703 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:00:38,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:00:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1904333292, now seen corresponding path program 25 times [2023-01-27 23:00:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:00:38,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465709577] [2023-01-27 23:00:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:00:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:00:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:00:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:00:40,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:00:40,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465709577] [2023-01-27 23:00:40,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465709577] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:00:40,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656368732] [2023-01-27 23:00:40,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:00:40,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:00:40,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:00:40,392 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) [2023-01-27 23:00:40,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 23:00:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:00:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-27 23:00:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:00:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:00:41,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:00:42,741 INFO L321 Elim1Store]: treesize reduction 38, result has 86.4 percent of original size [2023-01-27 23:00:42,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 380 treesize of output 430 [2023-01-27 23:00:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:00:51,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656368732] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:00:51,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:00:51,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 54 [2023-01-27 23:00:51,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978602989] [2023-01-27 23:00:51,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:00:51,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-01-27 23:00:51,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:00:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-01-27 23:00:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=2609, Unknown=0, NotChecked=0, Total=3080 [2023-01-27 23:00:51,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-27 23:00:51,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1696 transitions, 46465 flow. Second operand has 56 states, 56 states have (on average 78.39285714285714) internal successors, (4390), 56 states have internal predecessors, (4390), 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) [2023-01-27 23:00:51,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:00:51,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-27 23:00:51,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-27 23:01:06,764 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 [2023-01-27 23:01:06,764 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:01:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-01-27 23:01:06,838 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 23:01:06,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-27 23:01:07,042 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 [2023-01-27 23:01:07,042 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (56states, 77/257 universal loopers) in iteration 28,while PetriNetUnfolder was constructing finite prefix that currently has 70024 conditions, 11523 events (6528/11522 cut-off events. For 220644/220644 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 102622 event pairs, 2050 based on Foata normal form. 0/13511 useless extension candidates. Maximal degree in co-relation 69811. Up to 7301 conditions per place.). [2023-01-27 23:01:07,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 23:01:07,046 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 23:01:07,046 INFO L445 BasicCegarLoop]: Path program histogram: [25, 1, 1, 1] [2023-01-27 23:01:07,049 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:01:07,049 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:01:07,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:01:07 BasicIcfg [2023-01-27 23:01:07,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:01:07,056 INFO L158 Benchmark]: Toolchain (without parser) took 786227.47ms. Allocated memory was 337.6MB in the beginning and 12.6GB in the end (delta: 12.3GB). Free memory was 306.8MB in the beginning and 8.5GB in the end (delta: -8.2GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. [2023-01-27 23:01:07,056 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:01:07,056 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.67ms. Allocated memory is still 337.6MB. Free memory was 306.4MB in the beginning and 295.0MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 23:01:07,056 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.09ms. Allocated memory is still 337.6MB. Free memory was 295.0MB in the beginning and 292.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:01:07,057 INFO L158 Benchmark]: Boogie Preprocessor took 16.58ms. Allocated memory is still 337.6MB. Free memory was 292.9MB in the beginning and 291.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:01:07,057 INFO L158 Benchmark]: RCFGBuilder took 429.23ms. Allocated memory is still 337.6MB. Free memory was 291.3MB in the beginning and 269.5MB in the end (delta: 21.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-27 23:01:07,058 INFO L158 Benchmark]: TraceAbstraction took 785600.15ms. Allocated memory was 337.6MB in the beginning and 12.6GB in the end (delta: 12.3GB). Free memory was 269.0MB in the beginning and 8.5GB in the end (delta: -8.2GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. [2023-01-27 23:01:07,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 154.67ms. Allocated memory is still 337.6MB. Free memory was 306.4MB in the beginning and 295.0MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.09ms. Allocated memory is still 337.6MB. Free memory was 295.0MB in the beginning and 292.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.58ms. Allocated memory is still 337.6MB. Free memory was 292.9MB in the beginning and 291.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 429.23ms. Allocated memory is still 337.6MB. Free memory was 291.3MB in the beginning and 269.5MB in the end (delta: 21.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 785600.15ms. Allocated memory was 337.6MB in the beginning and 12.6GB in the end (delta: 12.3GB). Free memory was 269.0MB in the beginning and 8.5GB in the end (delta: -8.2GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 113 PlacesBefore, 20 PlacesAfterwards, 117 TransitionsBefore, 16 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 7 FixpointIterations, 68 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 13 ConcurrentYvCompositions, 8 ChoiceCompositions, 130 TotalNumberOfCompositions, 883 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 869, independent: 860, independent conditional: 0, independent unconditional: 860, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 456, independent: 451, independent conditional: 0, independent unconditional: 451, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 869, independent: 409, independent conditional: 0, independent unconditional: 409, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 456, unknown conditional: 0, unknown unconditional: 456] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, 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: 94]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (56states, 77/257 universal loopers) in iteration 28,while PetriNetUnfolder was constructing finite prefix that currently has 70024 conditions, 11523 events (6528/11522 cut-off events. For 220644/220644 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 102622 event pairs, 2050 based on Foata normal form. 0/13511 useless extension candidates. Maximal degree in co-relation 69811. Up to 7301 conditions per place.). - TimeoutResultAtElement [Line: 88]: 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 (56states, 77/257 universal loopers) in iteration 28,while PetriNetUnfolder was constructing finite prefix that currently has 70024 conditions, 11523 events (6528/11522 cut-off events. For 220644/220644 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 102622 event pairs, 2050 based on Foata normal form. 0/13511 useless extension candidates. Maximal degree in co-relation 69811. Up to 7301 conditions per place.). - TimeoutResultAtElement [Line: 89]: 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 (56states, 77/257 universal loopers) in iteration 28,while PetriNetUnfolder was constructing finite prefix that currently has 70024 conditions, 11523 events (6528/11522 cut-off events. For 220644/220644 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 102622 event pairs, 2050 based on Foata normal form. 0/13511 useless extension candidates. Maximal degree in co-relation 69811. Up to 7301 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 145 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: 785.5s, OverallIterations: 28, TraceHistogramMax: 6, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 639.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 92 mSolverCounterUnknown, 12105 SdHoareTripleChecker+Valid, 38.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12105 mSDsluCounter, 266 SdHoareTripleChecker+Invalid, 33.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 154 IncrementalHoareTripleChecker+Unchecked, 246 mSDsCounter, 1210 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56951 IncrementalHoareTripleChecker+Invalid, 58407 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1210 mSolverCounterUnsat, 20 mSDtfsCounter, 56951 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2701 GetRequests, 598 SyntacticMatches, 18 SemanticMatches, 2085 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 106667 ImplicationChecksByTransitivity, 130.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90394occurred in iteration=23, InterpolantAutomatonStates: 1468, 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: 0.3s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 132.5s InterpolantComputationTime, 1218 NumberOfCodeBlocks, 1216 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 1728 ConstructedInterpolants, 15 QuantifiedInterpolants, 56900 SizeOfPredicates, 569 NumberOfNonLiveVariables, 5789 ConjunctsInSsa, 1008 ConjunctsInUnsatCore, 78 InterpolantComputations, 3 PerfectInterpolantSequences, 410/1941 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