/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 21:39:30,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 21:39:30,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 21:39:30,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 21:39:30,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 21:39:30,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 21:39:30,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 21:39:30,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 21:39:30,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 21:39:30,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 21:39:30,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 21:39:30,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 21:39:30,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 21:39:30,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 21:39:30,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 21:39:30,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 21:39:30,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 21:39:30,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 21:39:30,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 21:39:30,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 21:39:30,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 21:39:30,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 21:39:30,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 21:39:30,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 21:39:30,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 21:39:30,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 21:39:30,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 21:39:30,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 21:39:30,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 21:39:30,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 21:39:30,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 21:39:30,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 21:39:30,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 21:39:30,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 21:39:30,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 21:39:30,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 21:39:30,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 21:39:30,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 21:39:30,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 21:39:30,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 21:39:30,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 21:39:30,513 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-NoLbe.epf [2022-09-20 21:39:30,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 21:39:30,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 21:39:30,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 21:39:30,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 21:39:30,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 21:39:30,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 21:39:30,541 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 21:39:30,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 21:39:30,541 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 21:39:30,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 21:39:30,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 21:39:30,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 21:39:30,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:39:30,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 21:39:30,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 21:39:30,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 21:39:30,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 21:39:30,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 21:39:30,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 21:39:30,746 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 21:39:30,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2022-09-20 21:39:30,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3022db362/e5457ee8d1a842f3b5f81800175c3e83/FLAG597672558 [2022-09-20 21:39:31,144 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 21:39:31,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2022-09-20 21:39:31,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3022db362/e5457ee8d1a842f3b5f81800175c3e83/FLAG597672558 [2022-09-20 21:39:31,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3022db362/e5457ee8d1a842f3b5f81800175c3e83 [2022-09-20 21:39:31,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 21:39:31,160 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 21:39:31,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 21:39:31,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 21:39:31,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 21:39:31,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e50b327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31, skipping insertion in model container [2022-09-20 21:39:31,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 21:39:31,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 21:39:31,314 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c[2005,2018] [2022-09-20 21:39:31,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:39:31,320 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 21:39:31,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c[2005,2018] [2022-09-20 21:39:31,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:39:31,342 INFO L208 MainTranslator]: Completed translation [2022-09-20 21:39:31,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31 WrapperNode [2022-09-20 21:39:31,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 21:39:31,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 21:39:31,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 21:39:31,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 21:39:31,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,364 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-09-20 21:39:31,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 21:39:31,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 21:39:31,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 21:39:31,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 21:39:31,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 21:39:31,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 21:39:31,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 21:39:31,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 21:39:31,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (1/1) ... [2022-09-20 21:39:31,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:39:31,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:31,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-09-20 21:39:31,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-09-20 21:39:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 21:39:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 21:39:31,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 21:39:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 21:39:31,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 21:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 21:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 21:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 21:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 21:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 21:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 21:39:31,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 21:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 21:39:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 21:39:31,433 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 21:39:31,488 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 21:39:31,489 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 21:39:31,593 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 21:39:31,598 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 21:39:31,598 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 21:39:31,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:39:31 BoogieIcfgContainer [2022-09-20 21:39:31,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 21:39:31,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 21:39:31,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 21:39:31,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 21:39:31,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 09:39:31" (1/3) ... [2022-09-20 21:39:31,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f044f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:39:31, skipping insertion in model container [2022-09-20 21:39:31,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:39:31" (2/3) ... [2022-09-20 21:39:31,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f044f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:39:31, skipping insertion in model container [2022-09-20 21:39:31,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:39:31" (3/3) ... [2022-09-20 21:39:31,605 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-09-20 21:39:31,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 21:39:31,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 21:39:31,617 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 21:39:31,653 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-20 21:39:31,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-09-20 21:39:31,733 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-09-20 21:39:31,734 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:39:31,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-09-20 21:39:31,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-09-20 21:39:31,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-09-20 21:39:31,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 21:39:31,751 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;@26081465, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 21:39:31,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 21:39:31,768 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-09-20 21:39:31,768 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:39:31,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:31,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:31,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2022-09-20 21:39:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:31,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680167069] [2022-09-20 21:39:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:31,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:31,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680167069] [2022-09-20 21:39:31,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680167069] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:31,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:31,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 21:39:31,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586855446] [2022-09-20 21:39:31,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:31,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 21:39:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:31,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 21:39:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 21:39:31,999 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2022-09-20 21:39:32,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:32,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2022-09-20 21:39:32,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:32,042 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-09-20 21:39:32,043 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-09-20 21:39:32,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-09-20 21:39:32,044 INFO L137 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-09-20 21:39:32,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2022-09-20 21:39:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 21:39:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 21:39:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2022-09-20 21:39:32,061 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-09-20 21:39:32,061 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2022-09-20 21:39:32,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2022-09-20 21:39:32,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:32,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2022-09-20 21:39:32,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,073 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,075 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2022-09-20 21:39:32,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2022-09-20 21:39:32,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 21:39:32,083 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-09-20 21:39:32,085 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-09-20 21:39:32,089 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-09-20 21:39:32,089 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-09-20 21:39:32,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:32,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:32,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 21:39:32,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2022-09-20 21:39:32,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506723114] [2022-09-20 21:39:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:32,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:32,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506723114] [2022-09-20 21:39:32,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506723114] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:32,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:32,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316848910] [2022-09-20 21:39:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:32,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:32,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:32,490 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:32,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:32,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:32,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:32,802 INFO L130 PetriNetUnfolder]: 106/357 cut-off events. [2022-09-20 21:39:32,803 INFO L131 PetriNetUnfolder]: For 22/28 co-relation queries the response was YES. [2022-09-20 21:39:32,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 357 events. 106/357 cut-off events. For 22/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1686 event pairs, 21 based on Foata normal form. 3/325 useless extension candidates. Maximal degree in co-relation 598. Up to 57 conditions per place. [2022-09-20 21:39:32,815 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2022-09-20 21:39:32,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2022-09-20 21:39:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-09-20 21:39:32,821 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-09-20 21:39:32,822 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-09-20 21:39:32,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-09-20 21:39:32,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:32,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-09-20 21:39:32,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,829 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,829 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2022-09-20 21:39:32,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2022-09-20 21:39:32,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 21:39:32,833 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2022-09-20 21:39:32,833 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2022-09-20 21:39:32,833 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-09-20 21:39:32,834 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2022-09-20 21:39:32,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:32,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:32,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:32,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 21:39:32,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:32,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1980240921, now seen corresponding path program 2 times [2022-09-20 21:39:32,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:32,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183886400] [2022-09-20 21:39:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:32,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:33,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183886400] [2022-09-20 21:39:33,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183886400] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:33,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:33,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:33,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238324789] [2022-09-20 21:39:33,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:33,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:33,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:33,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:33,127 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:33,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:33,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:33,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:33,407 INFO L130 PetriNetUnfolder]: 111/370 cut-off events. [2022-09-20 21:39:33,407 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-09-20 21:39:33,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 370 events. 111/370 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1727 event pairs, 31 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 812. Up to 98 conditions per place. [2022-09-20 21:39:33,411 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 54 selfloop transitions, 18 changer transitions 8/121 dead transitions. [2022-09-20 21:39:33,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 121 transitions, 526 flow [2022-09-20 21:39:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-09-20 21:39:33,413 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-09-20 21:39:33,413 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-09-20 21:39:33,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-09-20 21:39:33,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:33,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-09-20 21:39:33,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,418 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,418 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 792 transitions. [2022-09-20 21:39:33,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 121 transitions, 526 flow [2022-09-20 21:39:33,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 510 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-09-20 21:39:33,422 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 309 flow [2022-09-20 21:39:33,422 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=309, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2022-09-20 21:39:33,423 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 24 predicate places. [2022-09-20 21:39:33,423 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 309 flow [2022-09-20 21:39:33,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:33,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:33,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 21:39:33,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:33,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1386736289, now seen corresponding path program 3 times [2022-09-20 21:39:33,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:33,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096001596] [2022-09-20 21:39:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:33,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:33,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:33,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096001596] [2022-09-20 21:39:33,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096001596] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:33,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:33,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:33,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499993419] [2022-09-20 21:39:33,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:33,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:33,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:33,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:33,575 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:33,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 309 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:33,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:33,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:33,875 INFO L130 PetriNetUnfolder]: 139/385 cut-off events. [2022-09-20 21:39:33,875 INFO L131 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2022-09-20 21:39:33,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 385 events. 139/385 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1756 event pairs, 35 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1057. Up to 107 conditions per place. [2022-09-20 21:39:33,878 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 28 changer transitions 8/130 dead transitions. [2022-09-20 21:39:33,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 684 flow [2022-09-20 21:39:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-09-20 21:39:33,879 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-09-20 21:39:33,880 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-09-20 21:39:33,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-09-20 21:39:33,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:33,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-09-20 21:39:33,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,883 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,883 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 309 flow. Second operand 14 states and 794 transitions. [2022-09-20 21:39:33,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 684 flow [2022-09-20 21:39:33,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 614 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-09-20 21:39:33,888 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 427 flow [2022-09-20 21:39:33,888 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2022-09-20 21:39:33,888 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2022-09-20 21:39:33,888 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 427 flow [2022-09-20 21:39:33,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:33,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:33,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:33,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 21:39:33,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:33,890 INFO L85 PathProgramCache]: Analyzing trace with hash -83195579, now seen corresponding path program 4 times [2022-09-20 21:39:33,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:33,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439385359] [2022-09-20 21:39:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:33,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:34,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439385359] [2022-09-20 21:39:34,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439385359] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:34,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:34,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:34,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725268975] [2022-09-20 21:39:34,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:34,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:34,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:34,044 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:34,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 427 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:34,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:34,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:34,325 INFO L130 PetriNetUnfolder]: 162/417 cut-off events. [2022-09-20 21:39:34,325 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-09-20 21:39:34,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 417 events. 162/417 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1882 event pairs, 47 based on Foata normal form. 1/406 useless extension candidates. Maximal degree in co-relation 1322. Up to 121 conditions per place. [2022-09-20 21:39:34,328 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 38 changer transitions 8/148 dead transitions. [2022-09-20 21:39:34,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 919 flow [2022-09-20 21:39:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-09-20 21:39:34,330 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-09-20 21:39:34,330 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-09-20 21:39:34,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-09-20 21:39:34,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:34,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-09-20 21:39:34,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,334 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,334 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 427 flow. Second operand 14 states and 790 transitions. [2022-09-20 21:39:34,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 919 flow [2022-09-20 21:39:34,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 842 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-09-20 21:39:34,340 INFO L231 Difference]: Finished difference. Result has 114 places, 114 transitions, 631 flow [2022-09-20 21:39:34,340 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=631, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2022-09-20 21:39:34,342 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 37 predicate places. [2022-09-20 21:39:34,342 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 631 flow [2022-09-20 21:39:34,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:34,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:34,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 21:39:34,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1878158297, now seen corresponding path program 5 times [2022-09-20 21:39:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339129608] [2022-09-20 21:39:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:34,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:34,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:34,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339129608] [2022-09-20 21:39:34,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339129608] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:34,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:34,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:34,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913121912] [2022-09-20 21:39:34,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:34,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:34,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:34,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:34,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:34,494 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:34,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 631 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:34,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:34,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:34,686 INFO L130 PetriNetUnfolder]: 166/441 cut-off events. [2022-09-20 21:39:34,686 INFO L131 PetriNetUnfolder]: For 878/878 co-relation queries the response was YES. [2022-09-20 21:39:34,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 441 events. 166/441 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2104 event pairs, 44 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 1515. Up to 120 conditions per place. [2022-09-20 21:39:34,690 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 38 changer transitions 8/155 dead transitions. [2022-09-20 21:39:34,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 155 transitions, 1061 flow [2022-09-20 21:39:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-09-20 21:39:34,692 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-09-20 21:39:34,692 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-09-20 21:39:34,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-09-20 21:39:34,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:34,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-09-20 21:39:34,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,696 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,696 INFO L175 Difference]: Start difference. First operand has 114 places, 114 transitions, 631 flow. Second operand 14 states and 796 transitions. [2022-09-20 21:39:34,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 155 transitions, 1061 flow [2022-09-20 21:39:34,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 155 transitions, 989 flow, removed 22 selfloop flow, removed 8 redundant places. [2022-09-20 21:39:34,703 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 679 flow [2022-09-20 21:39:34,704 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=679, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2022-09-20 21:39:34,705 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 43 predicate places. [2022-09-20 21:39:34,705 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 679 flow [2022-09-20 21:39:34,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:34,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:34,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 21:39:34,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:34,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:34,707 INFO L85 PathProgramCache]: Analyzing trace with hash 211517427, now seen corresponding path program 6 times [2022-09-20 21:39:34,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:34,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924810891] [2022-09-20 21:39:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:34,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:34,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924810891] [2022-09-20 21:39:34,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924810891] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:34,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:34,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47828662] [2022-09-20 21:39:34,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:34,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:34,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:34,866 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:34,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 679 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:34,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:34,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:34,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:35,086 INFO L130 PetriNetUnfolder]: 184/501 cut-off events. [2022-09-20 21:39:35,086 INFO L131 PetriNetUnfolder]: For 1267/1269 co-relation queries the response was YES. [2022-09-20 21:39:35,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 501 events. 184/501 cut-off events. For 1267/1269 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2421 event pairs, 35 based on Foata normal form. 3/496 useless extension candidates. Maximal degree in co-relation 1726. Up to 143 conditions per place. [2022-09-20 21:39:35,089 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 43 changer transitions 7/154 dead transitions. [2022-09-20 21:39:35,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 154 transitions, 1142 flow [2022-09-20 21:39:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-09-20 21:39:35,091 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-09-20 21:39:35,091 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-09-20 21:39:35,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-09-20 21:39:35,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:35,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-09-20 21:39:35,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,094 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,095 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 679 flow. Second operand 14 states and 793 transitions. [2022-09-20 21:39:35,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 154 transitions, 1142 flow [2022-09-20 21:39:35,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1028 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:35,100 INFO L231 Difference]: Finished difference. Result has 124 places, 124 transitions, 821 flow [2022-09-20 21:39:35,101 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=821, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2022-09-20 21:39:35,101 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 47 predicate places. [2022-09-20 21:39:35,101 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 821 flow [2022-09-20 21:39:35,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:35,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:35,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-20 21:39:35,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1533574161, now seen corresponding path program 7 times [2022-09-20 21:39:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:35,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938103877] [2022-09-20 21:39:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:35,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:35,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:35,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938103877] [2022-09-20 21:39:35,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938103877] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:35,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:35,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:35,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195438253] [2022-09-20 21:39:35,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:35,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:35,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:35,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:35,223 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:35,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 821 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:35,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:35,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:35,443 INFO L130 PetriNetUnfolder]: 183/506 cut-off events. [2022-09-20 21:39:35,443 INFO L131 PetriNetUnfolder]: For 1565/1567 co-relation queries the response was YES. [2022-09-20 21:39:35,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 506 events. 183/506 cut-off events. For 1565/1567 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2499 event pairs, 37 based on Foata normal form. 3/504 useless extension candidates. Maximal degree in co-relation 1825. Up to 142 conditions per place. [2022-09-20 21:39:35,446 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 43 changer transitions 8/160 dead transitions. [2022-09-20 21:39:35,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 1256 flow [2022-09-20 21:39:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-09-20 21:39:35,448 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-09-20 21:39:35,448 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-09-20 21:39:35,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-09-20 21:39:35,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:35,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-09-20 21:39:35,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,453 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,453 INFO L175 Difference]: Start difference. First operand has 124 places, 124 transitions, 821 flow. Second operand 14 states and 790 transitions. [2022-09-20 21:39:35,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 1256 flow [2022-09-20 21:39:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1177 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-09-20 21:39:35,459 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 829 flow [2022-09-20 21:39:35,459 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=829, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2022-09-20 21:39:35,461 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 51 predicate places. [2022-09-20 21:39:35,461 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 829 flow [2022-09-20 21:39:35,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:35,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:35,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-09-20 21:39:35,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash -364553813, now seen corresponding path program 8 times [2022-09-20 21:39:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:35,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602187525] [2022-09-20 21:39:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:35,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:35,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:35,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602187525] [2022-09-20 21:39:35,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602187525] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:35,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:35,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:35,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886724780] [2022-09-20 21:39:35,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:35,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:35,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:35,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:35,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:35,633 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:35,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 829 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:35,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:35,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:35,896 INFO L130 PetriNetUnfolder]: 183/504 cut-off events. [2022-09-20 21:39:35,896 INFO L131 PetriNetUnfolder]: For 1784/1786 co-relation queries the response was YES. [2022-09-20 21:39:35,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 504 events. 183/504 cut-off events. For 1784/1786 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2476 event pairs, 34 based on Foata normal form. 3/499 useless extension candidates. Maximal degree in co-relation 1840. Up to 141 conditions per place. [2022-09-20 21:39:35,900 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 44 changer transitions 8/155 dead transitions. [2022-09-20 21:39:35,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 155 transitions, 1217 flow [2022-09-20 21:39:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-09-20 21:39:35,901 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-09-20 21:39:35,901 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-09-20 21:39:35,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-09-20 21:39:35,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:35,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-09-20 21:39:35,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,905 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,905 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 829 flow. Second operand 14 states and 795 transitions. [2022-09-20 21:39:35,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 155 transitions, 1217 flow [2022-09-20 21:39:35,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1117 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:35,936 INFO L231 Difference]: Finished difference. Result has 129 places, 124 transitions, 877 flow [2022-09-20 21:39:35,937 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=877, PETRI_PLACES=129, PETRI_TRANSITIONS=124} [2022-09-20 21:39:35,937 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 52 predicate places. [2022-09-20 21:39:35,937 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 124 transitions, 877 flow [2022-09-20 21:39:35,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:35,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:35,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:35,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-09-20 21:39:35,938 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1352752699, now seen corresponding path program 9 times [2022-09-20 21:39:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:35,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329108103] [2022-09-20 21:39:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:36,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329108103] [2022-09-20 21:39:36,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329108103] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:36,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:36,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:36,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922410542] [2022-09-20 21:39:36,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:36,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:36,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:36,064 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:36,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 124 transitions, 877 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:36,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:36,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:36,357 INFO L130 PetriNetUnfolder]: 177/457 cut-off events. [2022-09-20 21:39:36,357 INFO L131 PetriNetUnfolder]: For 1791/1793 co-relation queries the response was YES. [2022-09-20 21:39:36,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 457 events. 177/457 cut-off events. For 1791/1793 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2186 event pairs, 37 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 1791. Up to 132 conditions per place. [2022-09-20 21:39:36,361 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 42 changer transitions 8/153 dead transitions. [2022-09-20 21:39:36,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 1217 flow [2022-09-20 21:39:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-09-20 21:39:36,363 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-09-20 21:39:36,363 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-09-20 21:39:36,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-09-20 21:39:36,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:36,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-09-20 21:39:36,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,368 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,368 INFO L175 Difference]: Start difference. First operand has 129 places, 124 transitions, 877 flow. Second operand 14 states and 793 transitions. [2022-09-20 21:39:36,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 1217 flow [2022-09-20 21:39:36,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1127 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-09-20 21:39:36,375 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 858 flow [2022-09-20 21:39:36,376 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2022-09-20 21:39:36,376 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-09-20 21:39:36,377 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 858 flow [2022-09-20 21:39:36,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:36,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:36,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-09-20 21:39:36,378 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1962214603, now seen corresponding path program 10 times [2022-09-20 21:39:36,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:36,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941042108] [2022-09-20 21:39:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:36,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:36,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941042108] [2022-09-20 21:39:36,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941042108] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:36,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:36,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192395654] [2022-09-20 21:39:36,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:36,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:36,540 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:36,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:36,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:36,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:36,845 INFO L130 PetriNetUnfolder]: 186/518 cut-off events. [2022-09-20 21:39:36,846 INFO L131 PetriNetUnfolder]: For 1890/1894 co-relation queries the response was YES. [2022-09-20 21:39:36,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 518 events. 186/518 cut-off events. For 1890/1894 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2648 event pairs, 27 based on Foata normal form. 3/516 useless extension candidates. Maximal degree in co-relation 1891. Up to 139 conditions per place. [2022-09-20 21:39:36,849 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 43 changer transitions 8/157 dead transitions. [2022-09-20 21:39:36,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 157 transitions, 1235 flow [2022-09-20 21:39:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2022-09-20 21:39:36,851 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2022-09-20 21:39:36,851 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2022-09-20 21:39:36,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2022-09-20 21:39:36,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:36,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2022-09-20 21:39:36,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,854 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,854 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 858 flow. Second operand 14 states and 797 transitions. [2022-09-20 21:39:36,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 157 transitions, 1235 flow [2022-09-20 21:39:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 157 transitions, 1137 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:36,860 INFO L231 Difference]: Finished difference. Result has 132 places, 123 transitions, 872 flow [2022-09-20 21:39:36,860 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=872, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2022-09-20 21:39:36,860 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-09-20 21:39:36,860 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 872 flow [2022-09-20 21:39:36,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:36,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:36,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-09-20 21:39:36,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash -318523859, now seen corresponding path program 11 times [2022-09-20 21:39:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:36,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446435605] [2022-09-20 21:39:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:36,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446435605] [2022-09-20 21:39:36,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446435605] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:36,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:36,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:36,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593918809] [2022-09-20 21:39:36,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:36,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:36,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:36,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:36,986 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:36,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 872 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:36,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:36,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:36,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:37,254 INFO L130 PetriNetUnfolder]: 184/531 cut-off events. [2022-09-20 21:39:37,254 INFO L131 PetriNetUnfolder]: For 2015/2017 co-relation queries the response was YES. [2022-09-20 21:39:37,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 531 events. 184/531 cut-off events. For 2015/2017 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2756 event pairs, 35 based on Foata normal form. 3/527 useless extension candidates. Maximal degree in co-relation 1915. Up to 147 conditions per place. [2022-09-20 21:39:37,258 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 43 changer transitions 7/157 dead transitions. [2022-09-20 21:39:37,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 157 transitions, 1242 flow [2022-09-20 21:39:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-09-20 21:39:37,259 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-09-20 21:39:37,259 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-09-20 21:39:37,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-09-20 21:39:37,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:37,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-09-20 21:39:37,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,262 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,262 INFO L175 Difference]: Start difference. First operand has 132 places, 123 transitions, 872 flow. Second operand 14 states and 795 transitions. [2022-09-20 21:39:37,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 157 transitions, 1242 flow [2022-09-20 21:39:37,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1140 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:37,268 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 886 flow [2022-09-20 21:39:37,268 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=886, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2022-09-20 21:39:37,269 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2022-09-20 21:39:37,269 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 886 flow [2022-09-20 21:39:37,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:37,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:37,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-09-20 21:39:37,270 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 33584437, now seen corresponding path program 12 times [2022-09-20 21:39:37,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794858674] [2022-09-20 21:39:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:37,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794858674] [2022-09-20 21:39:37,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794858674] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:37,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:37,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:37,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553999181] [2022-09-20 21:39:37,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:37,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:37,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:37,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:37,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:37,388 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:37,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 886 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:37,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:37,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:37,610 INFO L130 PetriNetUnfolder]: 179/495 cut-off events. [2022-09-20 21:39:37,611 INFO L131 PetriNetUnfolder]: For 1983/1983 co-relation queries the response was YES. [2022-09-20 21:39:37,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 495 events. 179/495 cut-off events. For 1983/1983 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2514 event pairs, 43 based on Foata normal form. 1/486 useless extension candidates. Maximal degree in co-relation 1857. Up to 143 conditions per place. [2022-09-20 21:39:37,614 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 40 changer transitions 8/153 dead transitions. [2022-09-20 21:39:37,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 153 transitions, 1228 flow [2022-09-20 21:39:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-09-20 21:39:37,616 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-09-20 21:39:37,616 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-09-20 21:39:37,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-09-20 21:39:37,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:37,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-09-20 21:39:37,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,618 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,618 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 886 flow. Second operand 14 states and 791 transitions. [2022-09-20 21:39:37,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 153 transitions, 1228 flow [2022-09-20 21:39:37,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1130 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:37,625 INFO L231 Difference]: Finished difference. Result has 134 places, 122 transitions, 847 flow [2022-09-20 21:39:37,625 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=847, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2022-09-20 21:39:37,625 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2022-09-20 21:39:37,625 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 847 flow [2022-09-20 21:39:37,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:37,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:37,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-09-20 21:39:37,626 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:37,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1539772675, now seen corresponding path program 13 times [2022-09-20 21:39:37,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:37,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320935492] [2022-09-20 21:39:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:37,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:37,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:37,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320935492] [2022-09-20 21:39:37,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320935492] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:37,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:37,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:37,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815607630] [2022-09-20 21:39:37,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:37,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:37,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:37,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:37,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:37,767 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:37,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 847 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:37,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:37,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:37,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:38,013 INFO L130 PetriNetUnfolder]: 178/481 cut-off events. [2022-09-20 21:39:38,014 INFO L131 PetriNetUnfolder]: For 1912/1914 co-relation queries the response was YES. [2022-09-20 21:39:38,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 481 events. 178/481 cut-off events. For 1912/1914 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2393 event pairs, 45 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1828. Up to 142 conditions per place. [2022-09-20 21:39:38,017 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 7/153 dead transitions. [2022-09-20 21:39:38,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 153 transitions, 1228 flow [2022-09-20 21:39:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-09-20 21:39:38,018 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-09-20 21:39:38,019 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-09-20 21:39:38,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-09-20 21:39:38,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:38,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-09-20 21:39:38,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,021 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,021 INFO L175 Difference]: Start difference. First operand has 134 places, 122 transitions, 847 flow. Second operand 14 states and 792 transitions. [2022-09-20 21:39:38,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 153 transitions, 1228 flow [2022-09-20 21:39:38,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 153 transitions, 1130 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-09-20 21:39:38,027 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 893 flow [2022-09-20 21:39:38,028 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2022-09-20 21:39:38,028 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-09-20 21:39:38,028 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 893 flow [2022-09-20 21:39:38,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:38,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-09-20 21:39:38,029 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1154053461, now seen corresponding path program 14 times [2022-09-20 21:39:38,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:38,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216062323] [2022-09-20 21:39:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:38,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216062323] [2022-09-20 21:39:38,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216062323] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:38,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:38,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681365772] [2022-09-20 21:39:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:38,148 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:38,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 893 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:38,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:38,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:38,419 INFO L130 PetriNetUnfolder]: 184/547 cut-off events. [2022-09-20 21:39:38,419 INFO L131 PetriNetUnfolder]: For 2021/2025 co-relation queries the response was YES. [2022-09-20 21:39:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 547 events. 184/547 cut-off events. For 2021/2025 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2963 event pairs, 41 based on Foata normal form. 3/542 useless extension candidates. Maximal degree in co-relation 1980. Up to 132 conditions per place. [2022-09-20 21:39:38,423 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2022-09-20 21:39:38,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1328 flow [2022-09-20 21:39:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-09-20 21:39:38,425 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-09-20 21:39:38,425 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-09-20 21:39:38,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-09-20 21:39:38,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:38,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-09-20 21:39:38,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,427 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,427 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 893 flow. Second operand 14 states and 793 transitions. [2022-09-20 21:39:38,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1328 flow [2022-09-20 21:39:38,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1247 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-09-20 21:39:38,434 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 941 flow [2022-09-20 21:39:38,434 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=941, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2022-09-20 21:39:38,435 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2022-09-20 21:39:38,435 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 941 flow [2022-09-20 21:39:38,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:38,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-09-20 21:39:38,436 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1555045935, now seen corresponding path program 15 times [2022-09-20 21:39:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650652114] [2022-09-20 21:39:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:38,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:38,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:38,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650652114] [2022-09-20 21:39:38,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650652114] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:38,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:38,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563602490] [2022-09-20 21:39:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:38,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:38,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:38,552 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:38,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 941 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:38,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:38,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:38,785 INFO L130 PetriNetUnfolder]: 183/546 cut-off events. [2022-09-20 21:39:38,785 INFO L131 PetriNetUnfolder]: For 2136/2140 co-relation queries the response was YES. [2022-09-20 21:39:38,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 546 events. 183/546 cut-off events. For 2136/2140 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2954 event pairs, 41 based on Foata normal form. 3/541 useless extension candidates. Maximal degree in co-relation 2004. Up to 161 conditions per place. [2022-09-20 21:39:38,789 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 38 changer transitions 8/157 dead transitions. [2022-09-20 21:39:38,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1329 flow [2022-09-20 21:39:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-09-20 21:39:38,790 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-09-20 21:39:38,790 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-09-20 21:39:38,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-09-20 21:39:38,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:38,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-09-20 21:39:38,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,804 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,804 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 941 flow. Second operand 14 states and 788 transitions. [2022-09-20 21:39:38,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1329 flow [2022-09-20 21:39:38,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 157 transitions, 1239 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-09-20 21:39:38,811 INFO L231 Difference]: Finished difference. Result has 143 places, 125 transitions, 915 flow [2022-09-20 21:39:38,811 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=915, PETRI_PLACES=143, PETRI_TRANSITIONS=125} [2022-09-20 21:39:38,811 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-09-20 21:39:38,811 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 125 transitions, 915 flow [2022-09-20 21:39:38,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:38,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:38,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-09-20 21:39:38,812 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:38,813 INFO L85 PathProgramCache]: Analyzing trace with hash -125718487, now seen corresponding path program 16 times [2022-09-20 21:39:38,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:38,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026608174] [2022-09-20 21:39:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:38,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:38,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:38,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026608174] [2022-09-20 21:39:38,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026608174] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:38,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:38,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:38,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867287871] [2022-09-20 21:39:38,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:38,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:38,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:38,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:38,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:38,937 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:38,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 125 transitions, 915 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:38,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:38,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:38,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:39,132 INFO L130 PetriNetUnfolder]: 179/514 cut-off events. [2022-09-20 21:39:39,132 INFO L131 PetriNetUnfolder]: For 2071/2073 co-relation queries the response was YES. [2022-09-20 21:39:39,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 514 events. 179/514 cut-off events. For 2071/2073 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2736 event pairs, 51 based on Foata normal form. 1/503 useless extension candidates. Maximal degree in co-relation 1953. Up to 151 conditions per place. [2022-09-20 21:39:39,136 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 39 changer transitions 7/159 dead transitions. [2022-09-20 21:39:39,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 159 transitions, 1328 flow [2022-09-20 21:39:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-09-20 21:39:39,138 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-09-20 21:39:39,138 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-09-20 21:39:39,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-09-20 21:39:39,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:39,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-09-20 21:39:39,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,141 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,141 INFO L175 Difference]: Start difference. First operand has 143 places, 125 transitions, 915 flow. Second operand 14 states and 790 transitions. [2022-09-20 21:39:39,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 159 transitions, 1328 flow [2022-09-20 21:39:39,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 1238 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:39,148 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 931 flow [2022-09-20 21:39:39,148 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=931, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2022-09-20 21:39:39,149 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-09-20 21:39:39,149 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 931 flow [2022-09-20 21:39:39,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:39,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:39,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-09-20 21:39:39,157 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash -100489433, now seen corresponding path program 17 times [2022-09-20 21:39:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:39,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098018494] [2022-09-20 21:39:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:39,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:39,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098018494] [2022-09-20 21:39:39,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098018494] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:39,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:39,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:39,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126113318] [2022-09-20 21:39:39,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:39,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:39,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:39,266 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:39,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 931 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:39,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:39,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:39,521 INFO L130 PetriNetUnfolder]: 186/566 cut-off events. [2022-09-20 21:39:39,521 INFO L131 PetriNetUnfolder]: For 2240/2244 co-relation queries the response was YES. [2022-09-20 21:39:39,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 566 events. 186/566 cut-off events. For 2240/2244 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3184 event pairs, 39 based on Foata normal form. 3/561 useless extension candidates. Maximal degree in co-relation 2071. Up to 158 conditions per place. [2022-09-20 21:39:39,525 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 41 changer transitions 8/161 dead transitions. [2022-09-20 21:39:39,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 161 transitions, 1340 flow [2022-09-20 21:39:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-09-20 21:39:39,527 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-09-20 21:39:39,527 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-09-20 21:39:39,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-09-20 21:39:39,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:39,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-09-20 21:39:39,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,529 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,529 INFO L175 Difference]: Start difference. First operand has 143 places, 126 transitions, 931 flow. Second operand 14 states and 796 transitions. [2022-09-20 21:39:39,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 161 transitions, 1340 flow [2022-09-20 21:39:39,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 161 transitions, 1246 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:39,536 INFO L231 Difference]: Finished difference. Result has 145 places, 128 transitions, 957 flow [2022-09-20 21:39:39,537 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=957, PETRI_PLACES=145, PETRI_TRANSITIONS=128} [2022-09-20 21:39:39,537 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-09-20 21:39:39,537 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 128 transitions, 957 flow [2022-09-20 21:39:39,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:39,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:39,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-09-20 21:39:39,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:39,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:39,538 INFO L85 PathProgramCache]: Analyzing trace with hash 35132145, now seen corresponding path program 18 times [2022-09-20 21:39:39,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:39,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166563264] [2022-09-20 21:39:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:39,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:39,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166563264] [2022-09-20 21:39:39,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166563264] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:39,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:39,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945073506] [2022-09-20 21:39:39,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:39,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:39,652 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:39,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 128 transitions, 957 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:39,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:39,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:39,915 INFO L130 PetriNetUnfolder]: 182/534 cut-off events. [2022-09-20 21:39:39,915 INFO L131 PetriNetUnfolder]: For 2349/2351 co-relation queries the response was YES. [2022-09-20 21:39:39,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 534 events. 182/534 cut-off events. For 2349/2351 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2962 event pairs, 48 based on Foata normal form. 1/524 useless extension candidates. Maximal degree in co-relation 2043. Up to 166 conditions per place. [2022-09-20 21:39:39,919 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 38 changer transitions 9/157 dead transitions. [2022-09-20 21:39:39,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 157 transitions, 1329 flow [2022-09-20 21:39:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-09-20 21:39:39,920 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-09-20 21:39:39,920 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-09-20 21:39:39,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-09-20 21:39:39,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:39,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-09-20 21:39:39,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,923 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,923 INFO L175 Difference]: Start difference. First operand has 145 places, 128 transitions, 957 flow. Second operand 14 states and 791 transitions. [2022-09-20 21:39:39,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 157 transitions, 1329 flow [2022-09-20 21:39:39,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 157 transitions, 1231 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:39,931 INFO L231 Difference]: Finished difference. Result has 146 places, 126 transitions, 920 flow [2022-09-20 21:39:39,931 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2022-09-20 21:39:39,931 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-09-20 21:39:39,931 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 920 flow [2022-09-20 21:39:39,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:39,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:39,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-09-20 21:39:39,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash -228457297, now seen corresponding path program 19 times [2022-09-20 21:39:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:39,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580748949] [2022-09-20 21:39:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:40,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580748949] [2022-09-20 21:39:40,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580748949] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:40,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:40,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:40,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113453709] [2022-09-20 21:39:40,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:40,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:40,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:40,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:40,066 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:40,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 920 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:40,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:40,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:40,333 INFO L130 PetriNetUnfolder]: 182/564 cut-off events. [2022-09-20 21:39:40,333 INFO L131 PetriNetUnfolder]: For 2330/2334 co-relation queries the response was YES. [2022-09-20 21:39:40,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 564 events. 182/564 cut-off events. For 2330/2334 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3187 event pairs, 38 based on Foata normal form. 3/558 useless extension candidates. Maximal degree in co-relation 2064. Up to 166 conditions per place. [2022-09-20 21:39:40,337 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 38 changer transitions 7/158 dead transitions. [2022-09-20 21:39:40,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 158 transitions, 1313 flow [2022-09-20 21:39:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-09-20 21:39:40,343 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-09-20 21:39:40,343 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-09-20 21:39:40,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-09-20 21:39:40,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:40,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-09-20 21:39:40,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,349 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,349 INFO L175 Difference]: Start difference. First operand has 146 places, 126 transitions, 920 flow. Second operand 14 states and 795 transitions. [2022-09-20 21:39:40,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 158 transitions, 1313 flow [2022-09-20 21:39:40,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 1225 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:40,356 INFO L231 Difference]: Finished difference. Result has 146 places, 127 transitions, 936 flow [2022-09-20 21:39:40,356 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=936, PETRI_PLACES=146, PETRI_TRANSITIONS=127} [2022-09-20 21:39:40,358 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-09-20 21:39:40,358 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 127 transitions, 936 flow [2022-09-20 21:39:40,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:40,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:40,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-09-20 21:39:40,358 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash 134112017, now seen corresponding path program 20 times [2022-09-20 21:39:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:40,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328829402] [2022-09-20 21:39:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:40,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328829402] [2022-09-20 21:39:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328829402] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:40,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:40,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-09-20 21:39:40,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436856039] [2022-09-20 21:39:40,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:40,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 21:39:40,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 21:39:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-09-20 21:39:40,483 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:39:40,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 127 transitions, 936 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:40,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:39:40,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:40,735 INFO L130 PetriNetUnfolder]: 181/562 cut-off events. [2022-09-20 21:39:40,735 INFO L131 PetriNetUnfolder]: For 2413/2417 co-relation queries the response was YES. [2022-09-20 21:39:40,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 562 events. 181/562 cut-off events. For 2413/2417 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3152 event pairs, 37 based on Foata normal form. 3/557 useless extension candidates. Maximal degree in co-relation 2069. Up to 167 conditions per place. [2022-09-20 21:39:40,739 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 36 changer transitions 9/155 dead transitions. [2022-09-20 21:39:40,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 155 transitions, 1300 flow [2022-09-20 21:39:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-09-20 21:39:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-09-20 21:39:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-09-20 21:39:40,741 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-09-20 21:39:40,741 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-09-20 21:39:40,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-09-20 21:39:40,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:40,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-09-20 21:39:40,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,743 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,743 INFO L175 Difference]: Start difference. First operand has 146 places, 127 transitions, 936 flow. Second operand 14 states and 792 transitions. [2022-09-20 21:39:40,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 155 transitions, 1300 flow [2022-09-20 21:39:40,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 155 transitions, 1206 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-09-20 21:39:40,751 INFO L231 Difference]: Finished difference. Result has 146 places, 124 transitions, 889 flow [2022-09-20 21:39:40,751 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=889, PETRI_PLACES=146, PETRI_TRANSITIONS=124} [2022-09-20 21:39:40,751 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-09-20 21:39:40,751 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 124 transitions, 889 flow [2022-09-20 21:39:40,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:40,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:40,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-09-20 21:39:40,752 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:40,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:40,752 INFO L85 PathProgramCache]: Analyzing trace with hash -404474333, now seen corresponding path program 1 times [2022-09-20 21:39:40,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:40,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6098577] [2022-09-20 21:39:40,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:40,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:40,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:40,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6098577] [2022-09-20 21:39:40,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6098577] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:40,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504051113] [2022-09-20 21:39:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:40,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:40,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:39:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 21:39:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 21:39:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:39:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:40,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:39:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:40,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504051113] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:40,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:39:40,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-09-20 21:39:40,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039824180] [2022-09-20 21:39:40,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:40,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:40,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:39:40,876 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:40,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 124 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:40,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:40,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:40,972 INFO L130 PetriNetUnfolder]: 187/539 cut-off events. [2022-09-20 21:39:40,972 INFO L131 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2022-09-20 21:39:40,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2095 conditions, 539 events. 187/539 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2865 event pairs, 22 based on Foata normal form. 8/539 useless extension candidates. Maximal degree in co-relation 2059. Up to 139 conditions per place. [2022-09-20 21:39:40,977 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-09-20 21:39:40,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 176 transitions, 1666 flow [2022-09-20 21:39:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:39:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:39:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-09-20 21:39:40,978 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-09-20 21:39:40,979 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-09-20 21:39:40,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-09-20 21:39:40,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:40,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-09-20 21:39:40,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,980 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,980 INFO L175 Difference]: Start difference. First operand has 146 places, 124 transitions, 889 flow. Second operand 7 states and 483 transitions. [2022-09-20 21:39:40,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 176 transitions, 1666 flow [2022-09-20 21:39:40,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1544 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-09-20 21:39:40,989 INFO L231 Difference]: Finished difference. Result has 137 places, 139 transitions, 1053 flow [2022-09-20 21:39:40,989 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2022-09-20 21:39:40,989 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-09-20 21:39:40,989 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1053 flow [2022-09-20 21:39:40,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:40,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:40,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:41,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 21:39:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-09-20 21:39:41,207 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash 915068349, now seen corresponding path program 2 times [2022-09-20 21:39:41,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:41,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974502375] [2022-09-20 21:39:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:41,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:41,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:41,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974502375] [2022-09-20 21:39:41,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974502375] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:41,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:41,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:39:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021659423] [2022-09-20 21:39:41,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:41,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:41,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:41,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:41,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:39:41,230 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:41,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1053 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:41,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:41,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:41,359 INFO L130 PetriNetUnfolder]: 219/661 cut-off events. [2022-09-20 21:39:41,359 INFO L131 PetriNetUnfolder]: For 3400/3403 co-relation queries the response was YES. [2022-09-20 21:39:41,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 661 events. 219/661 cut-off events. For 3400/3403 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3891 event pairs, 51 based on Foata normal form. 3/656 useless extension candidates. Maximal degree in co-relation 2539. Up to 144 conditions per place. [2022-09-20 21:39:41,365 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-09-20 21:39:41,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1840 flow [2022-09-20 21:39:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:39:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:39:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-09-20 21:39:41,367 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-09-20 21:39:41,367 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-09-20 21:39:41,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-09-20 21:39:41,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:41,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-09-20 21:39:41,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,370 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,370 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 1053 flow. Second operand 8 states and 561 transitions. [2022-09-20 21:39:41,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1840 flow [2022-09-20 21:39:41,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1780 flow, removed 25 selfloop flow, removed 1 redundant places. [2022-09-20 21:39:41,379 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1403 flow [2022-09-20 21:39:41,380 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1403, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2022-09-20 21:39:41,380 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-09-20 21:39:41,381 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1403 flow [2022-09-20 21:39:41,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:41,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:41,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-09-20 21:39:41,382 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:41,382 INFO L85 PathProgramCache]: Analyzing trace with hash -489830307, now seen corresponding path program 1 times [2022-09-20 21:39:41,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:41,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387033904] [2022-09-20 21:39:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:41,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:41,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387033904] [2022-09-20 21:39:41,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387033904] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628946123] [2022-09-20 21:39:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:41,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:41,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:39:41,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 21:39:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:41,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 21:39:41,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:39:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:41,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:39:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:41,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628946123] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:41,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:39:41,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-09-20 21:39:41,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965648414] [2022-09-20 21:39:41,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:41,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:41,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:41,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:41,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-09-20 21:39:41,515 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:41,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1403 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:41,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:41,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:41,620 INFO L130 PetriNetUnfolder]: 246/777 cut-off events. [2022-09-20 21:39:41,620 INFO L131 PetriNetUnfolder]: For 4968/4974 co-relation queries the response was YES. [2022-09-20 21:39:41,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 777 events. 246/777 cut-off events. For 4968/4974 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4912 event pairs, 53 based on Foata normal form. 9/779 useless extension candidates. Maximal degree in co-relation 3149. Up to 217 conditions per place. [2022-09-20 21:39:41,626 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 132 selfloop transitions, 40 changer transitions 2/223 dead transitions. [2022-09-20 21:39:41,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 223 transitions, 2367 flow [2022-09-20 21:39:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:39:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:39:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-09-20 21:39:41,627 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-09-20 21:39:41,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-09-20 21:39:41,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-09-20 21:39:41,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:41,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-09-20 21:39:41,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,629 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,629 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1403 flow. Second operand 6 states and 429 transitions. [2022-09-20 21:39:41,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 223 transitions, 2367 flow [2022-09-20 21:39:41,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 223 transitions, 2324 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-09-20 21:39:41,642 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1711 flow [2022-09-20 21:39:41,642 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1711, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2022-09-20 21:39:41,642 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 79 predicate places. [2022-09-20 21:39:41,642 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1711 flow [2022-09-20 21:39:41,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:41,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:41,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 21:39:41,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-09-20 21:39:41,848 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash 614691113, now seen corresponding path program 2 times [2022-09-20 21:39:41,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:41,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671020100] [2022-09-20 21:39:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:41,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671020100] [2022-09-20 21:39:41,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671020100] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:41,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:41,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:39:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527977327] [2022-09-20 21:39:41,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:41,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:39:41,868 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:41,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1711 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:41,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:41,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:41,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:42,003 INFO L130 PetriNetUnfolder]: 276/859 cut-off events. [2022-09-20 21:39:42,003 INFO L131 PetriNetUnfolder]: For 6863/6863 co-relation queries the response was YES. [2022-09-20 21:39:42,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 859 events. 276/859 cut-off events. For 6863/6863 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5408 event pairs, 38 based on Foata normal form. 11/864 useless extension candidates. Maximal degree in co-relation 3735. Up to 153 conditions per place. [2022-09-20 21:39:42,009 INFO L137 encePairwiseOnDemand]: 77/87 looper letters, 109 selfloop transitions, 98 changer transitions 2/258 dead transitions. [2022-09-20 21:39:42,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 258 transitions, 3139 flow [2022-09-20 21:39:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 21:39:42,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 21:39:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2022-09-20 21:39:42,010 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7879948914431673 [2022-09-20 21:39:42,010 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2022-09-20 21:39:42,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2022-09-20 21:39:42,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:42,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2022-09-20 21:39:42,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 68.55555555555556) internal successors, (617), 9 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,012 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,012 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1711 flow. Second operand 9 states and 617 transitions. [2022-09-20 21:39:42,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 258 transitions, 3139 flow [2022-09-20 21:39:42,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 258 transitions, 3095 flow, removed 13 selfloop flow, removed 1 redundant places. [2022-09-20 21:39:42,043 INFO L231 Difference]: Finished difference. Result has 168 places, 216 transitions, 2693 flow [2022-09-20 21:39:42,044 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2693, PETRI_PLACES=168, PETRI_TRANSITIONS=216} [2022-09-20 21:39:42,044 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 91 predicate places. [2022-09-20 21:39:42,044 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 216 transitions, 2693 flow [2022-09-20 21:39:42,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:42,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:42,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-09-20 21:39:42,045 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2090104067, now seen corresponding path program 3 times [2022-09-20 21:39:42,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:42,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152088717] [2022-09-20 21:39:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:42,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:42,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:42,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152088717] [2022-09-20 21:39:42,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152088717] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:42,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:42,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:39:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226883149] [2022-09-20 21:39:42,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:42,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:39:42,065 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:42,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 216 transitions, 2693 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:42,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:42,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:42,197 INFO L130 PetriNetUnfolder]: 265/856 cut-off events. [2022-09-20 21:39:42,198 INFO L131 PetriNetUnfolder]: For 8498/8507 co-relation queries the response was YES. [2022-09-20 21:39:42,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4021 conditions, 856 events. 265/856 cut-off events. For 8498/8507 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5464 event pairs, 67 based on Foata normal form. 7/853 useless extension candidates. Maximal degree in co-relation 3973. Up to 197 conditions per place. [2022-09-20 21:39:42,204 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 145 selfloop transitions, 48 changer transitions 5/247 dead transitions. [2022-09-20 21:39:42,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 247 transitions, 3378 flow [2022-09-20 21:39:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:39:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:39:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-09-20 21:39:42,206 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-09-20 21:39:42,206 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-09-20 21:39:42,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-09-20 21:39:42,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:42,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-09-20 21:39:42,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,207 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,207 INFO L175 Difference]: Start difference. First operand has 168 places, 216 transitions, 2693 flow. Second operand 7 states and 486 transitions. [2022-09-20 21:39:42,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 247 transitions, 3378 flow [2022-09-20 21:39:42,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 247 transitions, 3268 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-09-20 21:39:42,231 INFO L231 Difference]: Finished difference. Result has 175 places, 214 transitions, 2664 flow [2022-09-20 21:39:42,231 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2664, PETRI_PLACES=175, PETRI_TRANSITIONS=214} [2022-09-20 21:39:42,231 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 98 predicate places. [2022-09-20 21:39:42,231 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 214 transitions, 2664 flow [2022-09-20 21:39:42,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:42,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:42,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-09-20 21:39:42,232 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash -438376403, now seen corresponding path program 4 times [2022-09-20 21:39:42,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:42,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563988891] [2022-09-20 21:39:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:42,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:42,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563988891] [2022-09-20 21:39:42,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563988891] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:42,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:42,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:39:42,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944845303] [2022-09-20 21:39:42,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:42,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:42,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:42,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:39:42,253 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:42,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 214 transitions, 2664 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:42,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:42,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:42,398 INFO L130 PetriNetUnfolder]: 255/820 cut-off events. [2022-09-20 21:39:42,398 INFO L131 PetriNetUnfolder]: For 8419/8425 co-relation queries the response was YES. [2022-09-20 21:39:42,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 820 events. 255/820 cut-off events. For 8419/8425 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5055 event pairs, 62 based on Foata normal form. 3/815 useless extension candidates. Maximal degree in co-relation 3831. Up to 197 conditions per place. [2022-09-20 21:39:42,408 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 135 selfloop transitions, 68 changer transitions 3/255 dead transitions. [2022-09-20 21:39:42,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 255 transitions, 3476 flow [2022-09-20 21:39:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:39:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:39:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 555 transitions. [2022-09-20 21:39:42,409 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7974137931034483 [2022-09-20 21:39:42,409 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 555 transitions. [2022-09-20 21:39:42,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 555 transitions. [2022-09-20 21:39:42,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:42,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 555 transitions. [2022-09-20 21:39:42,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,411 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,411 INFO L175 Difference]: Start difference. First operand has 175 places, 214 transitions, 2664 flow. Second operand 8 states and 555 transitions. [2022-09-20 21:39:42,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 255 transitions, 3476 flow [2022-09-20 21:39:42,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 255 transitions, 3397 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-09-20 21:39:42,434 INFO L231 Difference]: Finished difference. Result has 176 places, 221 transitions, 2959 flow [2022-09-20 21:39:42,434 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2959, PETRI_PLACES=176, PETRI_TRANSITIONS=221} [2022-09-20 21:39:42,434 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2022-09-20 21:39:42,434 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 221 transitions, 2959 flow [2022-09-20 21:39:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:42,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:42,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-09-20 21:39:42,436 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1478547713, now seen corresponding path program 3 times [2022-09-20 21:39:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:42,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548756520] [2022-09-20 21:39:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:42,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:42,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:42,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548756520] [2022-09-20 21:39:42,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548756520] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:42,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949723067] [2022-09-20 21:39:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:39:42,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:42,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:42,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:39:42,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 21:39:42,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:39:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:39:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 21:39:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:39:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:42,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:39:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:42,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949723067] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:42,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:39:42,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-09-20 21:39:42,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749289421] [2022-09-20 21:39:42,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:42,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:42,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:42,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:42,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-09-20 21:39:42,577 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:42,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 221 transitions, 2959 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:42,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:42,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:42,765 INFO L130 PetriNetUnfolder]: 274/924 cut-off events. [2022-09-20 21:39:42,766 INFO L131 PetriNetUnfolder]: For 10002/10008 co-relation queries the response was YES. [2022-09-20 21:39:42,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4258 conditions, 924 events. 274/924 cut-off events. For 10002/10008 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5999 event pairs, 45 based on Foata normal form. 12/926 useless extension candidates. Maximal degree in co-relation 4210. Up to 169 conditions per place. [2022-09-20 21:39:42,772 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 122 selfloop transitions, 101 changer transitions 2/274 dead transitions. [2022-09-20 21:39:42,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 3985 flow [2022-09-20 21:39:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:39:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:39:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2022-09-20 21:39:42,773 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8180076628352491 [2022-09-20 21:39:42,773 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 427 transitions. [2022-09-20 21:39:42,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 427 transitions. [2022-09-20 21:39:42,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:42,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 427 transitions. [2022-09-20 21:39:42,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,775 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,775 INFO L175 Difference]: Start difference. First operand has 176 places, 221 transitions, 2959 flow. Second operand 6 states and 427 transitions. [2022-09-20 21:39:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 3985 flow [2022-09-20 21:39:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 274 transitions, 3850 flow, removed 20 selfloop flow, removed 7 redundant places. [2022-09-20 21:39:42,800 INFO L231 Difference]: Finished difference. Result has 177 places, 238 transitions, 3491 flow [2022-09-20 21:39:42,800 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3491, PETRI_PLACES=177, PETRI_TRANSITIONS=238} [2022-09-20 21:39:42,801 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 100 predicate places. [2022-09-20 21:39:42,801 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 238 transitions, 3491 flow [2022-09-20 21:39:42,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:42,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:42,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:42,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 21:39:43,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:43,015 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1216001191, now seen corresponding path program 5 times [2022-09-20 21:39:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:43,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059243116] [2022-09-20 21:39:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:43,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:43,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:43,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059243116] [2022-09-20 21:39:43,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059243116] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:43,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:43,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:39:43,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747963217] [2022-09-20 21:39:43,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:43,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:43,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:43,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:39:43,040 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:43,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 238 transitions, 3491 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:43,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:43,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:43,199 INFO L130 PetriNetUnfolder]: 255/845 cut-off events. [2022-09-20 21:39:43,200 INFO L131 PetriNetUnfolder]: For 11332/11350 co-relation queries the response was YES. [2022-09-20 21:39:43,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4282 conditions, 845 events. 255/845 cut-off events. For 11332/11350 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5285 event pairs, 52 based on Foata normal form. 8/843 useless extension candidates. Maximal degree in co-relation 4233. Up to 203 conditions per place. [2022-09-20 21:39:43,206 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 122 selfloop transitions, 98 changer transitions 2/271 dead transitions. [2022-09-20 21:39:43,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 271 transitions, 4175 flow [2022-09-20 21:39:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:39:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:39:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-09-20 21:39:43,207 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-09-20 21:39:43,207 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-09-20 21:39:43,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-09-20 21:39:43,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:43,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-09-20 21:39:43,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,209 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,209 INFO L175 Difference]: Start difference. First operand has 177 places, 238 transitions, 3491 flow. Second operand 8 states and 568 transitions. [2022-09-20 21:39:43,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 271 transitions, 4175 flow [2022-09-20 21:39:43,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 271 transitions, 4090 flow, removed 23 selfloop flow, removed 2 redundant places. [2022-09-20 21:39:43,237 INFO L231 Difference]: Finished difference. Result has 180 places, 233 transitions, 3532 flow [2022-09-20 21:39:43,237 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3532, PETRI_PLACES=180, PETRI_TRANSITIONS=233} [2022-09-20 21:39:43,239 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2022-09-20 21:39:43,239 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 233 transitions, 3532 flow [2022-09-20 21:39:43,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:43,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:43,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-09-20 21:39:43,240 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1592299911, now seen corresponding path program 4 times [2022-09-20 21:39:43,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780926880] [2022-09-20 21:39:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:43,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780926880] [2022-09-20 21:39:43,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780926880] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922397862] [2022-09-20 21:39:43,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:39:43,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:43,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:43,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:39:43,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 21:39:43,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:39:43,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:39:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 21:39:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:39:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:43,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:39:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:43,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922397862] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:43,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:39:43,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-09-20 21:39:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332328103] [2022-09-20 21:39:43,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:43,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:43,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-09-20 21:39:43,356 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:43,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 233 transitions, 3532 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:43,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:43,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:43,493 INFO L130 PetriNetUnfolder]: 235/747 cut-off events. [2022-09-20 21:39:43,493 INFO L131 PetriNetUnfolder]: For 11153/11153 co-relation queries the response was YES. [2022-09-20 21:39:43,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3998 conditions, 747 events. 235/747 cut-off events. For 11153/11153 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4363 event pairs, 43 based on Foata normal form. 8/749 useless extension candidates. Maximal degree in co-relation 3950. Up to 229 conditions per place. [2022-09-20 21:39:43,498 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 137 selfloop transitions, 70 changer transitions 0/256 dead transitions. [2022-09-20 21:39:43,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 256 transitions, 4065 flow [2022-09-20 21:39:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:39:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:39:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-09-20 21:39:43,499 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-09-20 21:39:43,499 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-09-20 21:39:43,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-09-20 21:39:43,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:43,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-09-20 21:39:43,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,501 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,501 INFO L175 Difference]: Start difference. First operand has 180 places, 233 transitions, 3532 flow. Second operand 6 states and 426 transitions. [2022-09-20 21:39:43,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 256 transitions, 4065 flow [2022-09-20 21:39:43,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 256 transitions, 3871 flow, removed 23 selfloop flow, removed 6 redundant places. [2022-09-20 21:39:43,525 INFO L231 Difference]: Finished difference. Result has 181 places, 229 transitions, 3461 flow [2022-09-20 21:39:43,525 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3173, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3461, PETRI_PLACES=181, PETRI_TRANSITIONS=229} [2022-09-20 21:39:43,526 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2022-09-20 21:39:43,526 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 229 transitions, 3461 flow [2022-09-20 21:39:43,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:43,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:43,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 21:39:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:43,732 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1032792189, now seen corresponding path program 5 times [2022-09-20 21:39:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:43,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229434213] [2022-09-20 21:39:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:43,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:43,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229434213] [2022-09-20 21:39:43,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229434213] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:43,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:43,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:39:43,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192113182] [2022-09-20 21:39:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:43,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:43,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:43,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:39:43,752 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:43,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 229 transitions, 3461 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:43,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:43,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:43,883 INFO L130 PetriNetUnfolder]: 230/742 cut-off events. [2022-09-20 21:39:43,883 INFO L131 PetriNetUnfolder]: For 10830/10832 co-relation queries the response was YES. [2022-09-20 21:39:43,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3958 conditions, 742 events. 230/742 cut-off events. For 10830/10832 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4338 event pairs, 59 based on Foata normal form. 3/735 useless extension candidates. Maximal degree in co-relation 3912. Up to 198 conditions per place. [2022-09-20 21:39:43,889 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 155 selfloop transitions, 33 changer transitions 7/244 dead transitions. [2022-09-20 21:39:43,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 244 transitions, 3887 flow [2022-09-20 21:39:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:39:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:39:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-09-20 21:39:43,890 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-09-20 21:39:43,890 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-09-20 21:39:43,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-09-20 21:39:43,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:43,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-09-20 21:39:43,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,891 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,891 INFO L175 Difference]: Start difference. First operand has 181 places, 229 transitions, 3461 flow. Second operand 7 states and 483 transitions. [2022-09-20 21:39:43,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 244 transitions, 3887 flow [2022-09-20 21:39:43,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 244 transitions, 3834 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-09-20 21:39:43,917 INFO L231 Difference]: Finished difference. Result has 186 places, 221 transitions, 3240 flow [2022-09-20 21:39:43,917 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3240, PETRI_PLACES=186, PETRI_TRANSITIONS=221} [2022-09-20 21:39:43,917 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2022-09-20 21:39:43,917 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 221 transitions, 3240 flow [2022-09-20 21:39:43,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:43,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:43,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-09-20 21:39:43,918 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:43,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1692301223, now seen corresponding path program 6 times [2022-09-20 21:39:43,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:43,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861937954] [2022-09-20 21:39:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:43,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:43,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861937954] [2022-09-20 21:39:43,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861937954] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:43,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:43,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:39:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213985498] [2022-09-20 21:39:43,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:43,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:43,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:39:43,938 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:43,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 221 transitions, 3240 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:43,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:43,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:43,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:44,070 INFO L130 PetriNetUnfolder]: 217/676 cut-off events. [2022-09-20 21:39:44,070 INFO L131 PetriNetUnfolder]: For 10141/10143 co-relation queries the response was YES. [2022-09-20 21:39:44,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 676 events. 217/676 cut-off events. For 10141/10143 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3771 event pairs, 50 based on Foata normal form. 2/668 useless extension candidates. Maximal degree in co-relation 3599. Up to 198 conditions per place. [2022-09-20 21:39:44,075 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 128 selfloop transitions, 49 changer transitions 2/228 dead transitions. [2022-09-20 21:39:44,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 228 transitions, 3529 flow [2022-09-20 21:39:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:39:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:39:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-09-20 21:39:44,077 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2022-09-20 21:39:44,077 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-09-20 21:39:44,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-09-20 21:39:44,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:44,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-09-20 21:39:44,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,078 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,078 INFO L175 Difference]: Start difference. First operand has 186 places, 221 transitions, 3240 flow. Second operand 8 states and 550 transitions. [2022-09-20 21:39:44,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 228 transitions, 3529 flow [2022-09-20 21:39:44,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 228 transitions, 3295 flow, removed 12 selfloop flow, removed 9 redundant places. [2022-09-20 21:39:44,101 INFO L231 Difference]: Finished difference. Result has 180 places, 207 transitions, 2904 flow [2022-09-20 21:39:44,101 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2904, PETRI_PLACES=180, PETRI_TRANSITIONS=207} [2022-09-20 21:39:44,101 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2022-09-20 21:39:44,101 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 207 transitions, 2904 flow [2022-09-20 21:39:44,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:44,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:44,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-09-20 21:39:44,102 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1418986181, now seen corresponding path program 6 times [2022-09-20 21:39:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:44,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101812283] [2022-09-20 21:39:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:44,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:44,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:44,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101812283] [2022-09-20 21:39:44,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101812283] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:39:44,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:39:44,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:39:44,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388841729] [2022-09-20 21:39:44,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:39:44,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:39:44,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:44,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:39:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:39:44,120 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-09-20 21:39:44,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 207 transitions, 2904 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:44,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-09-20 21:39:44,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:44,256 INFO L130 PetriNetUnfolder]: 200/604 cut-off events. [2022-09-20 21:39:44,256 INFO L131 PetriNetUnfolder]: For 8392/8394 co-relation queries the response was YES. [2022-09-20 21:39:44,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3256 conditions, 604 events. 200/604 cut-off events. For 8392/8394 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3123 event pairs, 41 based on Foata normal form. 3/601 useless extension candidates. Maximal degree in co-relation 3216. Up to 190 conditions per place. [2022-09-20 21:39:44,260 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 111 selfloop transitions, 46 changer transitions 3/209 dead transitions. [2022-09-20 21:39:44,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 209 transitions, 3091 flow [2022-09-20 21:39:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:39:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:39:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2022-09-20 21:39:44,262 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2022-09-20 21:39:44,262 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2022-09-20 21:39:44,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2022-09-20 21:39:44,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:44,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2022-09-20 21:39:44,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,263 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,263 INFO L175 Difference]: Start difference. First operand has 180 places, 207 transitions, 2904 flow. Second operand 7 states and 480 transitions. [2022-09-20 21:39:44,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 209 transitions, 3091 flow [2022-09-20 21:39:44,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 209 transitions, 2939 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-09-20 21:39:44,280 INFO L231 Difference]: Finished difference. Result has 167 places, 193 transitions, 2621 flow [2022-09-20 21:39:44,280 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=167, PETRI_TRANSITIONS=193} [2022-09-20 21:39:44,280 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 90 predicate places. [2022-09-20 21:39:44,280 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 193 transitions, 2621 flow [2022-09-20 21:39:44,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:44,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:44,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:44,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-09-20 21:39:44,281 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008755, now seen corresponding path program 1 times [2022-09-20 21:39:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:44,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040931862] [2022-09-20 21:39:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:44,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:44,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040931862] [2022-09-20 21:39:44,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040931862] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:44,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137326003] [2022-09-20 21:39:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:44,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:44,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:44,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:39:44,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 21:39:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:39:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:39:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:44,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:39:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:45,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137326003] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:39:45,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:39:45,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:39:45,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492674422] [2022-09-20 21:39:45,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:39:45,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:39:45,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:39:45,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:39:45,136 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:39:45,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 193 transitions, 2621 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:45,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:45,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:39:45,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:53,855 INFO L130 PetriNetUnfolder]: 994/2383 cut-off events. [2022-09-20 21:39:53,856 INFO L131 PetriNetUnfolder]: For 32240/32240 co-relation queries the response was YES. [2022-09-20 21:39:53,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13142 conditions, 2383 events. 994/2383 cut-off events. For 32240/32240 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16519 event pairs, 31 based on Foata normal form. 3/2374 useless extension candidates. Maximal degree in co-relation 13107. Up to 363 conditions per place. [2022-09-20 21:39:53,877 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 249 selfloop transitions, 865 changer transitions 17/1170 dead transitions. [2022-09-20 21:39:53,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1170 transitions, 17248 flow [2022-09-20 21:39:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-09-20 21:39:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2022-09-20 21:39:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2022-09-20 21:39:53,888 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2022-09-20 21:39:53,888 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2022-09-20 21:39:53,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2022-09-20 21:39:53,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:53,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2022-09-20 21:39:53,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:53,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:53,921 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:53,921 INFO L175 Difference]: Start difference. First operand has 167 places, 193 transitions, 2621 flow. Second operand 224 states and 11784 transitions. [2022-09-20 21:39:53,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1170 transitions, 17248 flow [2022-09-20 21:39:53,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1170 transitions, 16312 flow, removed 44 selfloop flow, removed 10 redundant places. [2022-09-20 21:39:53,983 INFO L231 Difference]: Finished difference. Result has 436 places, 1001 transitions, 15313 flow [2022-09-20 21:39:53,983 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=15313, PETRI_PLACES=436, PETRI_TRANSITIONS=1001} [2022-09-20 21:39:53,984 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 359 predicate places. [2022-09-20 21:39:53,984 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1001 transitions, 15313 flow [2022-09-20 21:39:53,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:53,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:53,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:54,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 21:39:54,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-09-20 21:39:54,199 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash 34652497, now seen corresponding path program 2 times [2022-09-20 21:39:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:54,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314575774] [2022-09-20 21:39:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:54,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314575774] [2022-09-20 21:39:54,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314575774] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:54,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539046307] [2022-09-20 21:39:54,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:39:54,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:54,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:54,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:39:54,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 21:39:54,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:39:54,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:39:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:39:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:39:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:54,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:39:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:55,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539046307] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:39:55,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:39:55,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:39:55,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211201144] [2022-09-20 21:39:55,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:39:55,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:39:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:55,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:39:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:39:55,069 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:39:55,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1001 transitions, 15313 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:55,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:55,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:39:55,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:39:57,734 INFO L130 PetriNetUnfolder]: 1130/3120 cut-off events. [2022-09-20 21:39:57,734 INFO L131 PetriNetUnfolder]: For 130936/130936 co-relation queries the response was YES. [2022-09-20 21:39:57,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24075 conditions, 3120 events. 1130/3120 cut-off events. For 130936/130936 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25752 event pairs, 44 based on Foata normal form. 1/3108 useless extension candidates. Maximal degree in co-relation 23979. Up to 439 conditions per place. [2022-09-20 21:39:57,772 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 363 selfloop transitions, 771 changer transitions 45/1218 dead transitions. [2022-09-20 21:39:57,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1218 transitions, 22294 flow [2022-09-20 21:39:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-09-20 21:39:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-09-20 21:39:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2022-09-20 21:39:57,775 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2022-09-20 21:39:57,775 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2022-09-20 21:39:57,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2022-09-20 21:39:57,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:39:57,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2022-09-20 21:39:57,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:57,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:57,784 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:57,784 INFO L175 Difference]: Start difference. First operand has 436 places, 1001 transitions, 15313 flow. Second operand 64 states and 3489 transitions. [2022-09-20 21:39:57,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1218 transitions, 22294 flow [2022-09-20 21:39:58,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1218 transitions, 20815 flow, removed 486 selfloop flow, removed 14 redundant places. [2022-09-20 21:39:58,133 INFO L231 Difference]: Finished difference. Result has 497 places, 1047 transitions, 16743 flow [2022-09-20 21:39:58,134 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=14049, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=731, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=16743, PETRI_PLACES=497, PETRI_TRANSITIONS=1047} [2022-09-20 21:39:58,135 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 420 predicate places. [2022-09-20 21:39:58,135 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1047 transitions, 16743 flow [2022-09-20 21:39:58,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:58,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:58,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:58,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-09-20 21:39:58,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:58,336 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:58,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:58,336 INFO L85 PathProgramCache]: Analyzing trace with hash -52915711, now seen corresponding path program 3 times [2022-09-20 21:39:58,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:58,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283764018] [2022-09-20 21:39:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:58,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:58,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283764018] [2022-09-20 21:39:58,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283764018] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305090398] [2022-09-20 21:39:58,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:39:58,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:58,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:58,458 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:39:58,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 21:39:58,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:39:58,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:39:58,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:39:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:39:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:58,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:39:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:59,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305090398] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:39:59,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:39:59,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:39:59,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45807296] [2022-09-20 21:39:59,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:39:59,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:39:59,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:39:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:39:59,294 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:39:59,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1047 transitions, 16743 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:39:59,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:59,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:39:59,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:01,883 INFO L130 PetriNetUnfolder]: 1111/3084 cut-off events. [2022-09-20 21:40:01,883 INFO L131 PetriNetUnfolder]: For 151354/151354 co-relation queries the response was YES. [2022-09-20 21:40:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25258 conditions, 3084 events. 1111/3084 cut-off events. For 151354/151354 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25581 event pairs, 62 based on Foata normal form. 2/3056 useless extension candidates. Maximal degree in co-relation 25152. Up to 429 conditions per place. [2022-09-20 21:40:01,920 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 342 selfloop transitions, 783 changer transitions 31/1195 dead transitions. [2022-09-20 21:40:01,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1195 transitions, 22600 flow [2022-09-20 21:40:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-09-20 21:40:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-09-20 21:40:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2022-09-20 21:40:01,923 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2022-09-20 21:40:01,923 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2022-09-20 21:40:01,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2022-09-20 21:40:01,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:01,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2022-09-20 21:40:01,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:01,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:01,931 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:01,931 INFO L175 Difference]: Start difference. First operand has 497 places, 1047 transitions, 16743 flow. Second operand 66 states and 3577 transitions. [2022-09-20 21:40:01,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1195 transitions, 22600 flow [2022-09-20 21:40:02,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1195 transitions, 20818 flow, removed 165 selfloop flow, removed 43 redundant places. [2022-09-20 21:40:02,326 INFO L231 Difference]: Finished difference. Result has 527 places, 1064 transitions, 17258 flow [2022-09-20 21:40:02,327 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15074, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=17258, PETRI_PLACES=527, PETRI_TRANSITIONS=1064} [2022-09-20 21:40:02,327 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 450 predicate places. [2022-09-20 21:40:02,327 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 1064 transitions, 17258 flow [2022-09-20 21:40:02,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:02,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:02,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:02,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:02,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:02,540 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:02,540 INFO L85 PathProgramCache]: Analyzing trace with hash -930373283, now seen corresponding path program 4 times [2022-09-20 21:40:02,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:02,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52888519] [2022-09-20 21:40:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:02,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:02,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52888519] [2022-09-20 21:40:02,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52888519] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:02,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853976799] [2022-09-20 21:40:02,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:40:02,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:02,660 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) [2022-09-20 21:40:02,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 21:40:02,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:40:02,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:02,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-20 21:40:02,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:03,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:03,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853976799] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:03,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:03,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-09-20 21:40:03,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699671656] [2022-09-20 21:40:03,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:03,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:40:03,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:40:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:40:03,339 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:03,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 1064 transitions, 17258 flow. Second operand has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:03,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:03,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:03,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:04,984 INFO L130 PetriNetUnfolder]: 1109/3154 cut-off events. [2022-09-20 21:40:04,985 INFO L131 PetriNetUnfolder]: For 162714/162714 co-relation queries the response was YES. [2022-09-20 21:40:05,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25951 conditions, 3154 events. 1109/3154 cut-off events. For 162714/162714 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 26705 event pairs, 92 based on Foata normal form. 1/3125 useless extension candidates. Maximal degree in co-relation 25837. Up to 512 conditions per place. [2022-09-20 21:40:05,026 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 659 selfloop transitions, 462 changer transitions 23/1183 dead transitions. [2022-09-20 21:40:05,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1183 transitions, 22338 flow [2022-09-20 21:40:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-09-20 21:40:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-09-20 21:40:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2107 transitions. [2022-09-20 21:40:05,028 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6373260738052027 [2022-09-20 21:40:05,028 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2107 transitions. [2022-09-20 21:40:05,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2107 transitions. [2022-09-20 21:40:05,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:05,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2107 transitions. [2022-09-20 21:40:05,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.44736842105263) internal successors, (2107), 38 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:05,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:05,033 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:05,033 INFO L175 Difference]: Start difference. First operand has 527 places, 1064 transitions, 17258 flow. Second operand 38 states and 2107 transitions. [2022-09-20 21:40:05,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1183 transitions, 22338 flow [2022-09-20 21:40:05,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1183 transitions, 20592 flow, removed 134 selfloop flow, removed 52 redundant places. [2022-09-20 21:40:05,473 INFO L231 Difference]: Finished difference. Result has 510 places, 1074 transitions, 16764 flow [2022-09-20 21:40:05,474 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15629, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16764, PETRI_PLACES=510, PETRI_TRANSITIONS=1074} [2022-09-20 21:40:05,474 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 433 predicate places. [2022-09-20 21:40:05,474 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 1074 transitions, 16764 flow [2022-09-20 21:40:05,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.93939393939394) internal successors, (1681), 33 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:05,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:05,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:05,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:05,683 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,SelfDestructingSolverStorable36 [2022-09-20 21:40:05,683 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash -854241643, now seen corresponding path program 5 times [2022-09-20 21:40:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81226856] [2022-09-20 21:40:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:05,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81226856] [2022-09-20 21:40:05,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81226856] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:05,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993922503] [2022-09-20 21:40:05,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:40:05,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:05,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:05,832 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) [2022-09-20 21:40:05,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 21:40:05,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:40:05,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-09-20 21:40:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:06,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:40:06,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993922503] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:40:06,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:40:06,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-09-20 21:40:06,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507057955] [2022-09-20 21:40:06,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:40:06,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-09-20 21:40:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:06,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-09-20 21:40:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-09-20 21:40:06,118 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:40:06,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 1074 transitions, 16764 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:06,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:06,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:40:06,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:07,154 INFO L130 PetriNetUnfolder]: 1115/3155 cut-off events. [2022-09-20 21:40:07,154 INFO L131 PetriNetUnfolder]: For 151176/151176 co-relation queries the response was YES. [2022-09-20 21:40:07,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25303 conditions, 3155 events. 1115/3155 cut-off events. For 151176/151176 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26534 event pairs, 96 based on Foata normal form. 3/3120 useless extension candidates. Maximal degree in co-relation 25190. Up to 952 conditions per place. [2022-09-20 21:40:07,193 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 604 selfloop transitions, 556 changer transitions 21/1222 dead transitions. [2022-09-20 21:40:07,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1222 transitions, 21741 flow [2022-09-20 21:40:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-20 21:40:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-09-20 21:40:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 979 transitions. [2022-09-20 21:40:07,194 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6619337390128465 [2022-09-20 21:40:07,194 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 979 transitions. [2022-09-20 21:40:07,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 979 transitions. [2022-09-20 21:40:07,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:07,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 979 transitions. [2022-09-20 21:40:07,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.588235294117645) internal successors, (979), 17 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:07,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:07,197 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:07,197 INFO L175 Difference]: Start difference. First operand has 510 places, 1074 transitions, 16764 flow. Second operand 17 states and 979 transitions. [2022-09-20 21:40:07,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1222 transitions, 21741 flow [2022-09-20 21:40:07,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1222 transitions, 20950 flow, removed 37 selfloop flow, removed 20 redundant places. [2022-09-20 21:40:07,668 INFO L231 Difference]: Finished difference. Result has 506 places, 1130 transitions, 18148 flow [2022-09-20 21:40:07,669 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16001, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18148, PETRI_PLACES=506, PETRI_TRANSITIONS=1130} [2022-09-20 21:40:07,669 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 429 predicate places. [2022-09-20 21:40:07,669 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1130 transitions, 18148 flow [2022-09-20 21:40:07,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:07,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:07,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:07,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:07,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-09-20 21:40:07,870 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2062019199, now seen corresponding path program 6 times [2022-09-20 21:40:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841775597] [2022-09-20 21:40:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:08,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:08,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841775597] [2022-09-20 21:40:08,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841775597] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:08,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945838090] [2022-09-20 21:40:08,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:40:08,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:08,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:08,013 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) [2022-09-20 21:40:08,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 21:40:08,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-09-20 21:40:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:40:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:08,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:08,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945838090] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:08,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:08,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:40:08,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643767036] [2022-09-20 21:40:08,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:08,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:40:08,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:40:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:40:08,719 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:08,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1130 transitions, 18148 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:08,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:08,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:08,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:12,191 INFO L130 PetriNetUnfolder]: 1212/3435 cut-off events. [2022-09-20 21:40:12,191 INFO L131 PetriNetUnfolder]: For 183116/183116 co-relation queries the response was YES. [2022-09-20 21:40:12,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28991 conditions, 3435 events. 1212/3435 cut-off events. For 183116/183116 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 29512 event pairs, 71 based on Foata normal form. 2/3403 useless extension candidates. Maximal degree in co-relation 28876. Up to 418 conditions per place. [2022-09-20 21:40:12,237 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 361 selfloop transitions, 951 changer transitions 23/1374 dead transitions. [2022-09-20 21:40:12,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1374 transitions, 27061 flow [2022-09-20 21:40:12,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-09-20 21:40:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-09-20 21:40:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4736 transitions. [2022-09-20 21:40:12,240 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6185997910135841 [2022-09-20 21:40:12,240 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4736 transitions. [2022-09-20 21:40:12,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4736 transitions. [2022-09-20 21:40:12,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:12,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4736 transitions. [2022-09-20 21:40:12,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 53.81818181818182) internal successors, (4736), 88 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:12,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 87.0) internal successors, (7743), 89 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:12,250 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 87.0) internal successors, (7743), 89 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:12,250 INFO L175 Difference]: Start difference. First operand has 506 places, 1130 transitions, 18148 flow. Second operand 88 states and 4736 transitions. [2022-09-20 21:40:12,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1374 transitions, 27061 flow [2022-09-20 21:40:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1374 transitions, 26412 flow, removed 203 selfloop flow, removed 6 redundant places. [2022-09-20 21:40:12,827 INFO L231 Difference]: Finished difference. Result has 604 places, 1225 transitions, 21633 flow [2022-09-20 21:40:12,828 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=17819, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=21633, PETRI_PLACES=604, PETRI_TRANSITIONS=1225} [2022-09-20 21:40:12,829 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 527 predicate places. [2022-09-20 21:40:12,829 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1225 transitions, 21633 flow [2022-09-20 21:40:12,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:12,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:12,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:12,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:13,043 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,SelfDestructingSolverStorable38 [2022-09-20 21:40:13,043 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1531418965, now seen corresponding path program 7 times [2022-09-20 21:40:13,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:13,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330617716] [2022-09-20 21:40:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:13,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:13,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:13,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330617716] [2022-09-20 21:40:13,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330617716] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:13,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084428119] [2022-09-20 21:40:13,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:40:13,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:13,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:13,163 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) [2022-09-20 21:40:13,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-20 21:40:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:40:13,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:13,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:13,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084428119] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:13,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:13,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:40:13,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986445115] [2022-09-20 21:40:13,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:13,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:40:13,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:40:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:40:13,806 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:13,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1225 transitions, 21633 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:13,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:13,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:13,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:16,338 INFO L130 PetriNetUnfolder]: 1195/3496 cut-off events. [2022-09-20 21:40:16,338 INFO L131 PetriNetUnfolder]: For 184099/184099 co-relation queries the response was YES. [2022-09-20 21:40:16,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30059 conditions, 3496 events. 1195/3496 cut-off events. For 184099/184099 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 30461 event pairs, 59 based on Foata normal form. 1/3470 useless extension candidates. Maximal degree in co-relation 29929. Up to 471 conditions per place. [2022-09-20 21:40:16,389 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 441 selfloop transitions, 827 changer transitions 51/1358 dead transitions. [2022-09-20 21:40:16,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 1358 transitions, 28358 flow [2022-09-20 21:40:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-09-20 21:40:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-09-20 21:40:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3348 transitions. [2022-09-20 21:40:16,392 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6308648954211419 [2022-09-20 21:40:16,392 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3348 transitions. [2022-09-20 21:40:16,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3348 transitions. [2022-09-20 21:40:16,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:16,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3348 transitions. [2022-09-20 21:40:16,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.885245901639344) internal successors, (3348), 61 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:16,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:16,399 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:16,399 INFO L175 Difference]: Start difference. First operand has 604 places, 1225 transitions, 21633 flow. Second operand 61 states and 3348 transitions. [2022-09-20 21:40:16,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 1358 transitions, 28358 flow [2022-09-20 21:40:17,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1358 transitions, 27129 flow, removed 50 selfloop flow, removed 47 redundant places. [2022-09-20 21:40:17,021 INFO L231 Difference]: Finished difference. Result has 612 places, 1188 transitions, 21252 flow [2022-09-20 21:40:17,023 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=20450, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=21252, PETRI_PLACES=612, PETRI_TRANSITIONS=1188} [2022-09-20 21:40:17,023 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 535 predicate places. [2022-09-20 21:40:17,023 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1188 transitions, 21252 flow [2022-09-20 21:40:17,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:17,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:17,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:17,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:17,239 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,SelfDestructingSolverStorable39 [2022-09-20 21:40:17,239 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1894486363, now seen corresponding path program 8 times [2022-09-20 21:40:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:17,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670273352] [2022-09-20 21:40:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:17,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:17,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670273352] [2022-09-20 21:40:17,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670273352] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236430497] [2022-09-20 21:40:17,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:40:17,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:17,380 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) [2022-09-20 21:40:17,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-20 21:40:17,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:40:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:40:17,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:17,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:18,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236430497] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:18,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:18,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:40:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750074951] [2022-09-20 21:40:18,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:18,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:40:18,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:40:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:40:18,176 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:18,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1188 transitions, 21252 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:18,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:18,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:18,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:24,261 INFO L130 PetriNetUnfolder]: 1201/3444 cut-off events. [2022-09-20 21:40:24,261 INFO L131 PetriNetUnfolder]: For 187614/187614 co-relation queries the response was YES. [2022-09-20 21:40:24,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30622 conditions, 3444 events. 1201/3444 cut-off events. For 187614/187614 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29739 event pairs, 82 based on Foata normal form. 4/3402 useless extension candidates. Maximal degree in co-relation 30494. Up to 748 conditions per place. [2022-09-20 21:40:24,315 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 315 selfloop transitions, 981 changer transitions 25/1360 dead transitions. [2022-09-20 21:40:24,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 1360 transitions, 28870 flow [2022-09-20 21:40:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-09-20 21:40:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2022-09-20 21:40:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 7841 transitions. [2022-09-20 21:40:24,321 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6089624106865487 [2022-09-20 21:40:24,321 INFO L72 ComplementDD]: Start complementDD. Operand 148 states and 7841 transitions. [2022-09-20 21:40:24,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 148 states and 7841 transitions. [2022-09-20 21:40:24,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:24,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 148 states and 7841 transitions. [2022-09-20 21:40:24,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 149 states, 148 states have (on average 52.979729729729726) internal successors, (7841), 148 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:24,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 149 states, 149 states have (on average 87.0) internal successors, (12963), 149 states have internal predecessors, (12963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:24,338 INFO L81 ComplementDD]: Finished complementDD. Result has 149 states, 149 states have (on average 87.0) internal successors, (12963), 149 states have internal predecessors, (12963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:24,338 INFO L175 Difference]: Start difference. First operand has 612 places, 1188 transitions, 21252 flow. Second operand 148 states and 7841 transitions. [2022-09-20 21:40:24,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 1360 transitions, 28870 flow [2022-09-20 21:40:24,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1360 transitions, 27204 flow, removed 63 selfloop flow, removed 57 redundant places. [2022-09-20 21:40:24,996 INFO L231 Difference]: Finished difference. Result has 697 places, 1221 transitions, 22621 flow [2022-09-20 21:40:24,997 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=19738, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=148, PETRI_FLOW=22621, PETRI_PLACES=697, PETRI_TRANSITIONS=1221} [2022-09-20 21:40:24,997 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 620 predicate places. [2022-09-20 21:40:24,997 INFO L495 AbstractCegarLoop]: Abstraction has has 697 places, 1221 transitions, 22621 flow [2022-09-20 21:40:24,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:24,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:24,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:25,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:25,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:25,211 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash 761893121, now seen corresponding path program 9 times [2022-09-20 21:40:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:25,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246103823] [2022-09-20 21:40:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:25,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:25,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246103823] [2022-09-20 21:40:25,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246103823] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713596008] [2022-09-20 21:40:25,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:40:25,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:25,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:25,342 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) [2022-09-20 21:40:25,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-20 21:40:25,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:40:25,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:40:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:25,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:26,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713596008] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:26,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:26,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:40:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255716697] [2022-09-20 21:40:26,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:40:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:40:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:40:26,018 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:26,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 1221 transitions, 22621 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:26,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:26,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:26,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:31,735 INFO L130 PetriNetUnfolder]: 1231/3500 cut-off events. [2022-09-20 21:40:31,735 INFO L131 PetriNetUnfolder]: For 190181/190181 co-relation queries the response was YES. [2022-09-20 21:40:31,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31919 conditions, 3500 events. 1231/3500 cut-off events. For 190181/190181 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 30462 event pairs, 91 based on Foata normal form. 3/3455 useless extension candidates. Maximal degree in co-relation 31784. Up to 832 conditions per place. [2022-09-20 21:40:31,787 INFO L137 encePairwiseOnDemand]: 65/87 looper letters, 283 selfloop transitions, 1017 changer transitions 30/1369 dead transitions. [2022-09-20 21:40:31,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 1369 transitions, 29173 flow [2022-09-20 21:40:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-09-20 21:40:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-09-20 21:40:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7705 transitions. [2022-09-20 21:40:31,792 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6065973862383877 [2022-09-20 21:40:31,792 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7705 transitions. [2022-09-20 21:40:31,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7705 transitions. [2022-09-20 21:40:31,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:31,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7705 transitions. [2022-09-20 21:40:31,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 52.773972602739725) internal successors, (7705), 146 states have internal predecessors, (7705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:31,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:31,808 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:31,809 INFO L175 Difference]: Start difference. First operand has 697 places, 1221 transitions, 22621 flow. Second operand 146 states and 7705 transitions. [2022-09-20 21:40:31,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 1369 transitions, 29173 flow [2022-09-20 21:40:32,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 1369 transitions, 27894 flow, removed 41 selfloop flow, removed 114 redundant places. [2022-09-20 21:40:32,481 INFO L231 Difference]: Finished difference. Result has 737 places, 1240 transitions, 24112 flow [2022-09-20 21:40:32,488 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21371, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=999, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=24112, PETRI_PLACES=737, PETRI_TRANSITIONS=1240} [2022-09-20 21:40:32,489 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 660 predicate places. [2022-09-20 21:40:32,489 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 1240 transitions, 24112 flow [2022-09-20 21:40:32,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:32,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:32,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:32,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:32,690 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,SelfDestructingSolverStorable41 [2022-09-20 21:40:32,690 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:32,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:32,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1861006475, now seen corresponding path program 10 times [2022-09-20 21:40:32,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:32,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005572743] [2022-09-20 21:40:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:32,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:32,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:32,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005572743] [2022-09-20 21:40:32,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005572743] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:32,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154658169] [2022-09-20 21:40:32,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:40:32,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:32,832 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) [2022-09-20 21:40:32,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-09-20 21:40:32,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:40:32,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:32,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-20 21:40:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:33,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:33,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154658169] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:33,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:33,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-09-20 21:40:33,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246407343] [2022-09-20 21:40:33,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:33,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:40:33,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:40:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:40:33,339 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:33,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 1240 transitions, 24112 flow. Second operand has 33 states, 33 states have (on average 50.75757575757576) internal successors, (1675), 33 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:33,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:33,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:33,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:37,014 INFO L130 PetriNetUnfolder]: 1288/3616 cut-off events. [2022-09-20 21:40:37,014 INFO L131 PetriNetUnfolder]: For 204737/204737 co-relation queries the response was YES. [2022-09-20 21:40:37,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34205 conditions, 3616 events. 1288/3616 cut-off events. For 204737/204737 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31299 event pairs, 149 based on Foata normal form. 1/3561 useless extension candidates. Maximal degree in co-relation 34061. Up to 949 conditions per place. [2022-09-20 21:40:37,075 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 608 selfloop transitions, 793 changer transitions 36/1476 dead transitions. [2022-09-20 21:40:37,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 1476 transitions, 32028 flow [2022-09-20 21:40:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-09-20 21:40:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-09-20 21:40:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5385 transitions. [2022-09-20 21:40:37,079 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6128371457835439 [2022-09-20 21:40:37,079 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5385 transitions. [2022-09-20 21:40:37,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5385 transitions. [2022-09-20 21:40:37,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:37,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5385 transitions. [2022-09-20 21:40:37,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 53.31683168316832) internal successors, (5385), 101 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:37,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:37,091 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 87.0) internal successors, (8874), 102 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:37,091 INFO L175 Difference]: Start difference. First operand has 737 places, 1240 transitions, 24112 flow. Second operand 101 states and 5385 transitions. [2022-09-20 21:40:37,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 1476 transitions, 32028 flow [2022-09-20 21:40:38,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 1476 transitions, 30066 flow, removed 46 selfloop flow, removed 125 redundant places. [2022-09-20 21:40:38,040 INFO L231 Difference]: Finished difference. Result has 722 places, 1346 transitions, 25861 flow [2022-09-20 21:40:38,041 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=22444, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=25861, PETRI_PLACES=722, PETRI_TRANSITIONS=1346} [2022-09-20 21:40:38,041 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 645 predicate places. [2022-09-20 21:40:38,041 INFO L495 AbstractCegarLoop]: Abstraction has has 722 places, 1346 transitions, 25861 flow [2022-09-20 21:40:38,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.75757575757576) internal successors, (1675), 33 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:38,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:38,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:38,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:38,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:38,259 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:38,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1012667775, now seen corresponding path program 11 times [2022-09-20 21:40:38,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:38,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52951874] [2022-09-20 21:40:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:38,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:38,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:38,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52951874] [2022-09-20 21:40:38,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52951874] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:38,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894648236] [2022-09-20 21:40:38,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:40:38,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:38,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:38,382 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) [2022-09-20 21:40:38,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-09-20 21:40:38,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:40:38,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-09-20 21:40:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:38,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:40:38,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894648236] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:40:38,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:40:38,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-09-20 21:40:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205469639] [2022-09-20 21:40:38,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:40:38,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-09-20 21:40:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-09-20 21:40:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-09-20 21:40:38,657 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:40:38,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 1346 transitions, 25861 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:38,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:38,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:40:38,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:40,344 INFO L130 PetriNetUnfolder]: 1455/3984 cut-off events. [2022-09-20 21:40:40,345 INFO L131 PetriNetUnfolder]: For 240046/240046 co-relation queries the response was YES. [2022-09-20 21:40:40,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38513 conditions, 3984 events. 1455/3984 cut-off events. For 240046/240046 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 34556 event pairs, 146 based on Foata normal form. 6/3927 useless extension candidates. Maximal degree in co-relation 38358. Up to 1222 conditions per place. [2022-09-20 21:40:40,416 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 412 selfloop transitions, 1245 changer transitions 19/1717 dead transitions. [2022-09-20 21:40:40,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 1717 transitions, 36735 flow [2022-09-20 21:40:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-09-20 21:40:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-09-20 21:40:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1784 transitions. [2022-09-20 21:40:40,417 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6408045977011494 [2022-09-20 21:40:40,417 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1784 transitions. [2022-09-20 21:40:40,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1784 transitions. [2022-09-20 21:40:40,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:40,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1784 transitions. [2022-09-20 21:40:40,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.75) internal successors, (1784), 32 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:40,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:40,421 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:40,421 INFO L175 Difference]: Start difference. First operand has 722 places, 1346 transitions, 25861 flow. Second operand 32 states and 1784 transitions. [2022-09-20 21:40:40,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 1717 transitions, 36735 flow [2022-09-20 21:40:41,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 704 places, 1717 transitions, 35186 flow, removed 155 selfloop flow, removed 39 redundant places. [2022-09-20 21:40:41,651 INFO L231 Difference]: Finished difference. Result has 724 places, 1651 transitions, 34442 flow [2022-09-20 21:40:41,653 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=24815, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=34442, PETRI_PLACES=724, PETRI_TRANSITIONS=1651} [2022-09-20 21:40:41,653 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 647 predicate places. [2022-09-20 21:40:41,653 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 1651 transitions, 34442 flow [2022-09-20 21:40:41,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:41,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:41,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:41,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:41,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:41,861 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:41,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash -113282787, now seen corresponding path program 12 times [2022-09-20 21:40:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:41,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044687866] [2022-09-20 21:40:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:41,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044687866] [2022-09-20 21:40:41,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044687866] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:41,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323247016] [2022-09-20 21:40:41,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:40:41,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:41,981 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) [2022-09-20 21:40:41,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-09-20 21:40:42,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-09-20 21:40:42,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:42,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-09-20 21:40:42,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:42,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:42,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323247016] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:42,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:42,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-09-20 21:40:42,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927261691] [2022-09-20 21:40:42,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:42,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:40:42,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:42,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:40:42,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:40:42,537 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:42,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 1651 transitions, 34442 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:42,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:42,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:42,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:45,478 INFO L130 PetriNetUnfolder]: 1548/4364 cut-off events. [2022-09-20 21:40:45,478 INFO L131 PetriNetUnfolder]: For 305207/305207 co-relation queries the response was YES. [2022-09-20 21:40:45,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44538 conditions, 4364 events. 1548/4364 cut-off events. For 305207/305207 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 39644 event pairs, 72 based on Foata normal form. 4/4339 useless extension candidates. Maximal degree in co-relation 44370. Up to 797 conditions per place. [2022-09-20 21:40:45,556 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 422 selfloop transitions, 1282 changer transitions 78/1821 dead transitions. [2022-09-20 21:40:45,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 1821 transitions, 42512 flow [2022-09-20 21:40:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-09-20 21:40:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-09-20 21:40:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2906 transitions. [2022-09-20 21:40:45,558 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6185610898254577 [2022-09-20 21:40:45,558 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2906 transitions. [2022-09-20 21:40:45,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2906 transitions. [2022-09-20 21:40:45,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:45,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2906 transitions. [2022-09-20 21:40:45,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.81481481481482) internal successors, (2906), 54 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:45,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:45,563 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:45,563 INFO L175 Difference]: Start difference. First operand has 724 places, 1651 transitions, 34442 flow. Second operand 54 states and 2906 transitions. [2022-09-20 21:40:45,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 1821 transitions, 42512 flow [2022-09-20 21:40:47,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 1821 transitions, 40798 flow, removed 282 selfloop flow, removed 11 redundant places. [2022-09-20 21:40:47,313 INFO L231 Difference]: Finished difference. Result has 776 places, 1682 transitions, 37157 flow [2022-09-20 21:40:47,314 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=32943, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=37157, PETRI_PLACES=776, PETRI_TRANSITIONS=1682} [2022-09-20 21:40:47,314 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 699 predicate places. [2022-09-20 21:40:47,314 INFO L495 AbstractCegarLoop]: Abstraction has has 776 places, 1682 transitions, 37157 flow [2022-09-20 21:40:47,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:47,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:47,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:47,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:47,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-09-20 21:40:47,515 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash 467141591, now seen corresponding path program 13 times [2022-09-20 21:40:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326157106] [2022-09-20 21:40:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:47,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:47,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326157106] [2022-09-20 21:40:47,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326157106] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562773374] [2022-09-20 21:40:47,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:40:47,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:47,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:47,648 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) [2022-09-20 21:40:47,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-09-20 21:40:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:47,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:40:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:47,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:48,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562773374] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:48,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:48,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:40:48,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301825528] [2022-09-20 21:40:48,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:48,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:40:48,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:40:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:40:48,284 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:48,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 1682 transitions, 37157 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:48,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:48,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:48,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:40:56,690 INFO L130 PetriNetUnfolder]: 1425/3949 cut-off events. [2022-09-20 21:40:56,690 INFO L131 PetriNetUnfolder]: For 193930/193930 co-relation queries the response was YES. [2022-09-20 21:40:56,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38658 conditions, 3949 events. 1425/3949 cut-off events. For 193930/193930 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 34298 event pairs, 73 based on Foata normal form. 3/3922 useless extension candidates. Maximal degree in co-relation 38481. Up to 731 conditions per place. [2022-09-20 21:40:56,764 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 421 selfloop transitions, 1359 changer transitions 38/1857 dead transitions. [2022-09-20 21:40:56,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 1857 transitions, 45956 flow [2022-09-20 21:40:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-09-20 21:40:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2022-09-20 21:40:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 10089 transitions. [2022-09-20 21:40:56,769 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6071493049286875 [2022-09-20 21:40:56,769 INFO L72 ComplementDD]: Start complementDD. Operand 191 states and 10089 transitions. [2022-09-20 21:40:56,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 191 states and 10089 transitions. [2022-09-20 21:40:56,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:40:56,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 191 states and 10089 transitions. [2022-09-20 21:40:56,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 192 states, 191 states have (on average 52.82198952879581) internal successors, (10089), 191 states have internal predecessors, (10089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:56,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 192 states, 192 states have (on average 87.0) internal successors, (16704), 192 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:56,787 INFO L81 ComplementDD]: Finished complementDD. Result has 192 states, 192 states have (on average 87.0) internal successors, (16704), 192 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:56,787 INFO L175 Difference]: Start difference. First operand has 776 places, 1682 transitions, 37157 flow. Second operand 191 states and 10089 transitions. [2022-09-20 21:40:56,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 1857 transitions, 45956 flow [2022-09-20 21:40:58,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 922 places, 1857 transitions, 44011 flow, removed 439 selfloop flow, removed 37 redundant places. [2022-09-20 21:40:58,132 INFO L231 Difference]: Finished difference. Result has 931 places, 1661 transitions, 38349 flow [2022-09-20 21:40:58,133 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=36002, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=191, PETRI_FLOW=38349, PETRI_PLACES=931, PETRI_TRANSITIONS=1661} [2022-09-20 21:40:58,134 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 854 predicate places. [2022-09-20 21:40:58,134 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 1661 transitions, 38349 flow [2022-09-20 21:40:58,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:58,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:40:58,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:40:58,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-09-20 21:40:58,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:58,341 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:40:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:40:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash 864512579, now seen corresponding path program 14 times [2022-09-20 21:40:58,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:40:58,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982830608] [2022-09-20 21:40:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:40:58,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:40:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:40:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:58,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:40:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982830608] [2022-09-20 21:40:58,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982830608] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:40:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776389710] [2022-09-20 21:40:58,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:40:58,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:40:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:40:58,461 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) [2022-09-20 21:40:58,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-09-20 21:40:58,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:40:58,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:40:58,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:40:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:40:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:58,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:40:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:40:59,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776389710] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:40:59,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:40:59,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:40:59,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922967285] [2022-09-20 21:40:59,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:40:59,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:40:59,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:40:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:40:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:40:59,122 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:40:59,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 1661 transitions, 38349 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:40:59,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:40:59,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:40:59,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:02,358 INFO L130 PetriNetUnfolder]: 1419/4051 cut-off events. [2022-09-20 21:41:02,358 INFO L131 PetriNetUnfolder]: For 142385/142385 co-relation queries the response was YES. [2022-09-20 21:41:02,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38067 conditions, 4051 events. 1419/4051 cut-off events. For 142385/142385 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 35611 event pairs, 66 based on Foata normal form. 2/4029 useless extension candidates. Maximal degree in co-relation 37896. Up to 721 conditions per place. [2022-09-20 21:41:02,426 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 293 selfloop transitions, 1429 changer transitions 17/1778 dead transitions. [2022-09-20 21:41:02,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 1778 transitions, 44247 flow [2022-09-20 21:41:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-09-20 21:41:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-09-20 21:41:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3082 transitions. [2022-09-20 21:41:02,428 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6107808164883076 [2022-09-20 21:41:02,428 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3082 transitions. [2022-09-20 21:41:02,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3082 transitions. [2022-09-20 21:41:02,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:02,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3082 transitions. [2022-09-20 21:41:02,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.13793103448276) internal successors, (3082), 58 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:02,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:02,433 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 87.0) internal successors, (5133), 59 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:02,433 INFO L175 Difference]: Start difference. First operand has 931 places, 1661 transitions, 38349 flow. Second operand 58 states and 3082 transitions. [2022-09-20 21:41:02,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 1778 transitions, 44247 flow [2022-09-20 21:41:03,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 1778 transitions, 41754 flow, removed 24 selfloop flow, removed 172 redundant places. [2022-09-20 21:41:03,487 INFO L231 Difference]: Finished difference. Result has 806 places, 1711 transitions, 40165 flow [2022-09-20 21:41:03,488 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=35959, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=40165, PETRI_PLACES=806, PETRI_TRANSITIONS=1711} [2022-09-20 21:41:03,488 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 729 predicate places. [2022-09-20 21:41:03,488 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 1711 transitions, 40165 flow [2022-09-20 21:41:03,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:03,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:41:03,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:41:03,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-09-20 21:41:03,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:03,690 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:41:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:41:03,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1961745853, now seen corresponding path program 15 times [2022-09-20 21:41:03,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:41:03,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321867391] [2022-09-20 21:41:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:41:03,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:41:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:03,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:41:03,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321867391] [2022-09-20 21:41:03,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321867391] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:41:03,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680413557] [2022-09-20 21:41:03,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:41:03,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:03,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:41:03,810 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) [2022-09-20 21:41:03,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-09-20 21:41:03,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:41:03,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:41:03,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-09-20 21:41:03,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:41:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:04,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:41:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:04,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680413557] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:41:04,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:41:04,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-09-20 21:41:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595197583] [2022-09-20 21:41:04,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:41:04,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:41:04,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:41:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:41:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:41:04,336 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:41:04,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 1711 transitions, 40165 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:04,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:41:04,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:41:04,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:07,357 INFO L130 PetriNetUnfolder]: 1484/4241 cut-off events. [2022-09-20 21:41:07,357 INFO L131 PetriNetUnfolder]: For 161571/161571 co-relation queries the response was YES. [2022-09-20 21:41:07,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41100 conditions, 4241 events. 1484/4241 cut-off events. For 161571/161571 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 37799 event pairs, 72 based on Foata normal form. 4/4207 useless extension candidates. Maximal degree in co-relation 40928. Up to 790 conditions per place. [2022-09-20 21:41:07,436 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 442 selfloop transitions, 1335 changer transitions 35/1851 dead transitions. [2022-09-20 21:41:07,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 1851 transitions, 47459 flow [2022-09-20 21:41:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-09-20 21:41:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-09-20 21:41:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3006 transitions. [2022-09-20 21:41:07,438 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6169950738916257 [2022-09-20 21:41:07,438 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3006 transitions. [2022-09-20 21:41:07,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3006 transitions. [2022-09-20 21:41:07,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:07,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3006 transitions. [2022-09-20 21:41:07,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 53.67857142857143) internal successors, (3006), 56 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:07,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 87.0) internal successors, (4959), 57 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:07,443 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 87.0) internal successors, (4959), 57 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:07,443 INFO L175 Difference]: Start difference. First operand has 806 places, 1711 transitions, 40165 flow. Second operand 56 states and 3006 transitions. [2022-09-20 21:41:07,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 1851 transitions, 47459 flow [2022-09-20 21:41:08,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 1851 transitions, 45417 flow, removed 140 selfloop flow, removed 35 redundant places. [2022-09-20 21:41:08,894 INFO L231 Difference]: Finished difference. Result has 833 places, 1754 transitions, 42636 flow [2022-09-20 21:41:08,895 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=38326, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=42636, PETRI_PLACES=833, PETRI_TRANSITIONS=1754} [2022-09-20 21:41:08,895 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 756 predicate places. [2022-09-20 21:41:08,895 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 1754 transitions, 42636 flow [2022-09-20 21:41:08,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:08,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:41:08,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:41:08,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-09-20 21:41:09,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:09,096 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:41:09,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:41:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 970812609, now seen corresponding path program 16 times [2022-09-20 21:41:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:41:09,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518833145] [2022-09-20 21:41:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:41:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:41:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:09,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:41:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518833145] [2022-09-20 21:41:09,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518833145] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:41:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886958936] [2022-09-20 21:41:09,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:41:09,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:09,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:41:09,230 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) [2022-09-20 21:41:09,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-09-20 21:41:09,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:41:09,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:41:09,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-20 21:41:09,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:41:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:09,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:41:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:09,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886958936] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:41:09,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:41:09,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-09-20 21:41:09,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961321783] [2022-09-20 21:41:09,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:41:09,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:41:09,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:41:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:41:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:41:09,756 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:41:09,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 1754 transitions, 42636 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:09,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:41:09,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:41:09,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:15,290 INFO L130 PetriNetUnfolder]: 1599/4460 cut-off events. [2022-09-20 21:41:15,291 INFO L131 PetriNetUnfolder]: For 168765/168765 co-relation queries the response was YES. [2022-09-20 21:41:15,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44088 conditions, 4460 events. 1599/4460 cut-off events. For 168765/168765 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 39533 event pairs, 151 based on Foata normal form. 4/4418 useless extension candidates. Maximal degree in co-relation 43911. Up to 1172 conditions per place. [2022-09-20 21:41:15,379 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 827 selfloop transitions, 1257 changer transitions 16/2139 dead transitions. [2022-09-20 21:41:15,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 942 places, 2139 transitions, 55118 flow [2022-09-20 21:41:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-09-20 21:41:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2022-09-20 21:41:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 6701 transitions. [2022-09-20 21:41:15,384 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6064802244547017 [2022-09-20 21:41:15,384 INFO L72 ComplementDD]: Start complementDD. Operand 127 states and 6701 transitions. [2022-09-20 21:41:15,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 6701 transitions. [2022-09-20 21:41:15,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:15,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 127 states and 6701 transitions. [2022-09-20 21:41:15,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 128 states, 127 states have (on average 52.76377952755905) internal successors, (6701), 127 states have internal predecessors, (6701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:15,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 128 states, 128 states have (on average 87.0) internal successors, (11136), 128 states have internal predecessors, (11136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:15,395 INFO L81 ComplementDD]: Finished complementDD. Result has 128 states, 128 states have (on average 87.0) internal successors, (11136), 128 states have internal predecessors, (11136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:15,395 INFO L175 Difference]: Start difference. First operand has 833 places, 1754 transitions, 42636 flow. Second operand 127 states and 6701 transitions. [2022-09-20 21:41:15,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 942 places, 2139 transitions, 55118 flow [2022-09-20 21:41:16,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 892 places, 2139 transitions, 52244 flow, removed 44 selfloop flow, removed 50 redundant places. [2022-09-20 21:41:16,988 INFO L231 Difference]: Finished difference. Result has 904 places, 2021 transitions, 48345 flow [2022-09-20 21:41:16,989 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40206, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=127, PETRI_FLOW=48345, PETRI_PLACES=904, PETRI_TRANSITIONS=2021} [2022-09-20 21:41:16,989 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 827 predicate places. [2022-09-20 21:41:16,990 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2021 transitions, 48345 flow [2022-09-20 21:41:16,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:16,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:41:16,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:41:17,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-09-20 21:41:17,206 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,SelfDestructingSolverStorable48 [2022-09-20 21:41:17,207 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:41:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:41:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash 937933709, now seen corresponding path program 17 times [2022-09-20 21:41:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:41:17,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511393228] [2022-09-20 21:41:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:41:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:41:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:17,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:41:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511393228] [2022-09-20 21:41:17,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511393228] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:41:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079435743] [2022-09-20 21:41:17,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:41:17,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:17,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:41:17,331 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) [2022-09-20 21:41:17,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-09-20 21:41:17,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:41:17,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:41:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-09-20 21:41:17,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:41:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:17,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:41:17,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079435743] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:41:17,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:41:17,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-09-20 21:41:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137193815] [2022-09-20 21:41:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:41:17,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-09-20 21:41:17,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:41:17,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-09-20 21:41:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-09-20 21:41:17,660 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-09-20 21:41:17,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2021 transitions, 48345 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:17,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:41:17,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-09-20 21:41:17,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:20,254 INFO L130 PetriNetUnfolder]: 1599/4454 cut-off events. [2022-09-20 21:41:20,254 INFO L131 PetriNetUnfolder]: For 166041/166041 co-relation queries the response was YES. [2022-09-20 21:41:20,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44049 conditions, 4454 events. 1599/4454 cut-off events. For 166041/166041 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 39696 event pairs, 137 based on Foata normal form. 7/4415 useless extension candidates. Maximal degree in co-relation 43865. Up to 1139 conditions per place. [2022-09-20 21:41:20,448 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 498 selfloop transitions, 1507 changer transitions 27/2073 dead transitions. [2022-09-20 21:41:20,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 931 places, 2073 transitions, 53464 flow [2022-09-20 21:41:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-09-20 21:41:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-09-20 21:41:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2022-09-20 21:41:20,449 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6404454022988506 [2022-09-20 21:41:20,449 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2022-09-20 21:41:20,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2022-09-20 21:41:20,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:20,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2022-09-20 21:41:20,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:20,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:20,452 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 87.0) internal successors, (2871), 33 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:20,452 INFO L175 Difference]: Start difference. First operand has 904 places, 2021 transitions, 48345 flow. Second operand 32 states and 1783 transitions. [2022-09-20 21:41:20,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 931 places, 2073 transitions, 53464 flow [2022-09-20 21:41:21,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 2073 transitions, 52700 flow, removed 83 selfloop flow, removed 29 redundant places. [2022-09-20 21:41:21,962 INFO L231 Difference]: Finished difference. Result has 906 places, 2001 transitions, 50237 flow [2022-09-20 21:41:21,963 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=47596, PETRI_DIFFERENCE_MINUEND_PLACES=871, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=50237, PETRI_PLACES=906, PETRI_TRANSITIONS=2001} [2022-09-20 21:41:21,964 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 829 predicate places. [2022-09-20 21:41:21,964 INFO L495 AbstractCegarLoop]: Abstraction has has 906 places, 2001 transitions, 50237 flow [2022-09-20 21:41:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:21,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:41:21,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:41:21,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-09-20 21:41:22,164 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,SelfDestructingSolverStorable49 [2022-09-20 21:41:22,165 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:41:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:41:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash 674811117, now seen corresponding path program 18 times [2022-09-20 21:41:22,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:41:22,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859389423] [2022-09-20 21:41:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:41:22,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:41:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:22,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:41:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859389423] [2022-09-20 21:41:22,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859389423] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:41:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108129049] [2022-09-20 21:41:22,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:41:22,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:22,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:41:22,294 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) [2022-09-20 21:41:22,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-09-20 21:41:22,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-09-20 21:41:22,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:41:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-09-20 21:41:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:41:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:22,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:41:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:22,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108129049] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:41:22,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:41:22,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-09-20 21:41:22,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803379963] [2022-09-20 21:41:22,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:41:22,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:41:22,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:41:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:41:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:41:22,828 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:41:22,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 906 places, 2001 transitions, 50237 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:22,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:41:22,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:41:22,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:26,323 INFO L130 PetriNetUnfolder]: 1829/4794 cut-off events. [2022-09-20 21:41:26,323 INFO L131 PetriNetUnfolder]: For 181277/181277 co-relation queries the response was YES. [2022-09-20 21:41:26,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51383 conditions, 4794 events. 1829/4794 cut-off events. For 181277/181277 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 41964 event pairs, 91 based on Foata normal form. 1/4758 useless extension candidates. Maximal degree in co-relation 51201. Up to 1004 conditions per place. [2022-09-20 21:41:26,415 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 717 selfloop transitions, 1686 changer transitions 9/2451 dead transitions. [2022-09-20 21:41:26,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 2451 transitions, 66441 flow [2022-09-20 21:41:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-09-20 21:41:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-09-20 21:41:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2351 transitions. [2022-09-20 21:41:26,417 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.614158829676071 [2022-09-20 21:41:26,417 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2351 transitions. [2022-09-20 21:41:26,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2351 transitions. [2022-09-20 21:41:26,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:26,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2351 transitions. [2022-09-20 21:41:26,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 53.43181818181818) internal successors, (2351), 44 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:26,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:26,421 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:26,421 INFO L175 Difference]: Start difference. First operand has 906 places, 2001 transitions, 50237 flow. Second operand 44 states and 2351 transitions. [2022-09-20 21:41:26,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 939 places, 2451 transitions, 66441 flow [2022-09-20 21:41:28,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 904 places, 2451 transitions, 62661 flow, removed 20 selfloop flow, removed 35 redundant places. [2022-09-20 21:41:28,190 INFO L231 Difference]: Finished difference. Result has 933 places, 2375 transitions, 62269 flow [2022-09-20 21:41:28,191 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=47164, PETRI_DIFFERENCE_MINUEND_PLACES=861, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=62269, PETRI_PLACES=933, PETRI_TRANSITIONS=2375} [2022-09-20 21:41:28,192 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 856 predicate places. [2022-09-20 21:41:28,192 INFO L495 AbstractCegarLoop]: Abstraction has has 933 places, 2375 transitions, 62269 flow [2022-09-20 21:41:28,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:28,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:41:28,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:41:28,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-09-20 21:41:28,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:28,393 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:41:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:41:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash -417411559, now seen corresponding path program 19 times [2022-09-20 21:41:28,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:41:28,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324110960] [2022-09-20 21:41:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:41:28,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:41:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:28,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:41:28,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324110960] [2022-09-20 21:41:28,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324110960] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:41:28,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916286334] [2022-09-20 21:41:28,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:41:28,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:41:28,518 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) [2022-09-20 21:41:28,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-09-20 21:41:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:41:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:41:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:28,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:41:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:29,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916286334] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:41:29,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:41:29,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:41:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528343526] [2022-09-20 21:41:29,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:41:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:41:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:41:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:41:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:41:29,295 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:41:29,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 933 places, 2375 transitions, 62269 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:29,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:41:29,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:41:29,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:34,442 INFO L130 PetriNetUnfolder]: 2010/5202 cut-off events. [2022-09-20 21:41:34,442 INFO L131 PetriNetUnfolder]: For 213915/213915 co-relation queries the response was YES. [2022-09-20 21:41:34,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57931 conditions, 5202 events. 2010/5202 cut-off events. For 213915/213915 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 45869 event pairs, 103 based on Foata normal form. 1/5165 useless extension candidates. Maximal degree in co-relation 57725. Up to 1155 conditions per place. [2022-09-20 21:41:34,669 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 1003 selfloop transitions, 1693 changer transitions 10/2745 dead transitions. [2022-09-20 21:41:34,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1001 places, 2745 transitions, 77094 flow [2022-09-20 21:41:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-09-20 21:41:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-09-20 21:41:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 3844 transitions. [2022-09-20 21:41:34,672 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6052590143284522 [2022-09-20 21:41:34,672 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 3844 transitions. [2022-09-20 21:41:34,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 3844 transitions. [2022-09-20 21:41:34,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:34,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 3844 transitions. [2022-09-20 21:41:34,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 52.657534246575345) internal successors, (3844), 73 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:34,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 87.0) internal successors, (6438), 74 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:34,678 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 87.0) internal successors, (6438), 74 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:34,679 INFO L175 Difference]: Start difference. First operand has 933 places, 2375 transitions, 62269 flow. Second operand 73 states and 3844 transitions. [2022-09-20 21:41:34,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1001 places, 2745 transitions, 77094 flow [2022-09-20 21:41:36,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 990 places, 2745 transitions, 76822 flow, removed 19 selfloop flow, removed 11 redundant places. [2022-09-20 21:41:36,876 INFO L231 Difference]: Finished difference. Result has 1016 places, 2678 transitions, 76091 flow [2022-09-20 21:41:36,878 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=62009, PETRI_DIFFERENCE_MINUEND_PLACES=918, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=76091, PETRI_PLACES=1016, PETRI_TRANSITIONS=2678} [2022-09-20 21:41:36,878 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 939 predicate places. [2022-09-20 21:41:36,878 INFO L495 AbstractCegarLoop]: Abstraction has has 1016 places, 2678 transitions, 76091 flow [2022-09-20 21:41:36,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:36,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:41:36,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:41:36,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-09-20 21:41:37,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:37,079 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:41:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:41:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash -780241453, now seen corresponding path program 20 times [2022-09-20 21:41:37,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:41:37,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656395263] [2022-09-20 21:41:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:41:37,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:41:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:37,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:41:37,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656395263] [2022-09-20 21:41:37,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656395263] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:41:37,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226085280] [2022-09-20 21:41:37,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:41:37,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:37,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:41:37,200 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) [2022-09-20 21:41:37,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-09-20 21:41:37,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:41:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:41:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:41:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:41:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:37,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:41:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:37,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226085280] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:41:37,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:41:37,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:41:37,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467760274] [2022-09-20 21:41:37,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:41:37,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:41:37,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:41:37,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:41:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:41:37,820 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:41:37,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1016 places, 2678 transitions, 76091 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:37,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:41:37,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:41:37,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:44,603 INFO L130 PetriNetUnfolder]: 2187/5596 cut-off events. [2022-09-20 21:41:44,603 INFO L131 PetriNetUnfolder]: For 257573/257573 co-relation queries the response was YES. [2022-09-20 21:41:44,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66535 conditions, 5596 events. 2187/5596 cut-off events. For 257573/257573 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 49499 event pairs, 95 based on Foata normal form. 1/5561 useless extension candidates. Maximal degree in co-relation 66307. Up to 1193 conditions per place. [2022-09-20 21:41:44,731 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 987 selfloop transitions, 2035 changer transitions 10/3071 dead transitions. [2022-09-20 21:41:44,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1097 places, 3071 transitions, 92457 flow [2022-09-20 21:41:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-09-20 21:41:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-09-20 21:41:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4603 transitions. [2022-09-20 21:41:44,734 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6081384595058792 [2022-09-20 21:41:44,734 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4603 transitions. [2022-09-20 21:41:44,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4603 transitions. [2022-09-20 21:41:44,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:44,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4603 transitions. [2022-09-20 21:41:44,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 52.9080459770115) internal successors, (4603), 87 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:44,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:44,742 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:44,742 INFO L175 Difference]: Start difference. First operand has 1016 places, 2678 transitions, 76091 flow. Second operand 87 states and 4603 transitions. [2022-09-20 21:41:44,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1097 places, 3071 transitions, 92457 flow [2022-09-20 21:41:47,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1084 places, 3071 transitions, 92136 flow, removed 52 selfloop flow, removed 13 redundant places. [2022-09-20 21:41:48,058 INFO L231 Difference]: Finished difference. Result has 1106 places, 2976 transitions, 89443 flow [2022-09-20 21:41:48,060 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=75785, PETRI_DIFFERENCE_MINUEND_PLACES=998, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1763, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=89443, PETRI_PLACES=1106, PETRI_TRANSITIONS=2976} [2022-09-20 21:41:48,060 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 1029 predicate places. [2022-09-20 21:41:48,061 INFO L495 AbstractCegarLoop]: Abstraction has has 1106 places, 2976 transitions, 89443 flow [2022-09-20 21:41:48,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:48,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:41:48,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:41:48,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-09-20 21:41:48,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:48,266 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:41:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:41:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash 539217073, now seen corresponding path program 21 times [2022-09-20 21:41:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:41:48,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387358158] [2022-09-20 21:41:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:41:48,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:41:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:48,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:41:48,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387358158] [2022-09-20 21:41:48,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387358158] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:41:48,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989808946] [2022-09-20 21:41:48,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:41:48,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:48,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:41:48,416 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) [2022-09-20 21:41:48,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-09-20 21:41:48,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 21:41:48,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:41:48,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:41:48,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:41:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:48,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:41:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:49,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989808946] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:41:49,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:41:49,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-09-20 21:41:49,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563056816] [2022-09-20 21:41:49,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:41:49,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:41:49,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:41:49,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:41:49,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:41:49,093 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:41:49,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1106 places, 2976 transitions, 89443 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:49,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:41:49,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:41:49,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:55,534 INFO L130 PetriNetUnfolder]: 2188/5656 cut-off events. [2022-09-20 21:41:55,534 INFO L131 PetriNetUnfolder]: For 286142/286142 co-relation queries the response was YES. [2022-09-20 21:41:55,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69890 conditions, 5656 events. 2188/5656 cut-off events. For 286142/286142 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 50523 event pairs, 103 based on Foata normal form. 1/5621 useless extension candidates. Maximal degree in co-relation 69643. Up to 1220 conditions per place. [2022-09-20 21:41:55,670 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 1214 selfloop transitions, 1793 changer transitions 10/3056 dead transitions. [2022-09-20 21:41:55,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1154 places, 3056 transitions, 97525 flow [2022-09-20 21:41:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-09-20 21:41:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-09-20 21:41:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2874 transitions. [2022-09-20 21:41:55,672 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.611749680715198 [2022-09-20 21:41:55,672 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2874 transitions. [2022-09-20 21:41:55,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2874 transitions. [2022-09-20 21:41:55,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:55,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2874 transitions. [2022-09-20 21:41:55,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.22222222222222) internal successors, (2874), 54 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:55,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:55,677 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:55,677 INFO L175 Difference]: Start difference. First operand has 1106 places, 2976 transitions, 89443 flow. Second operand 54 states and 2874 transitions. [2022-09-20 21:41:55,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1154 places, 3056 transitions, 97525 flow [2022-09-20 21:41:59,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1128 places, 3056 transitions, 96926 flow, removed 88 selfloop flow, removed 26 redundant places. [2022-09-20 21:41:59,471 INFO L231 Difference]: Finished difference. Result has 1138 places, 3001 transitions, 93836 flow [2022-09-20 21:41:59,473 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=88861, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1769, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=93836, PETRI_PLACES=1138, PETRI_TRANSITIONS=3001} [2022-09-20 21:41:59,474 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 1061 predicate places. [2022-09-20 21:41:59,474 INFO L495 AbstractCegarLoop]: Abstraction has has 1138 places, 3001 transitions, 93836 flow [2022-09-20 21:41:59,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:41:59,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:41:59,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:41:59,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-09-20 21:41:59,674 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,SelfDestructingSolverStorable53 [2022-09-20 21:41:59,675 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:41:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:41:59,675 INFO L85 PathProgramCache]: Analyzing trace with hash 607135037, now seen corresponding path program 22 times [2022-09-20 21:41:59,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:41:59,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534860548] [2022-09-20 21:41:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:41:59,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:41:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:41:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:41:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:41:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534860548] [2022-09-20 21:41:59,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534860548] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:41:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697737265] [2022-09-20 21:41:59,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:41:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:41:59,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:41:59,797 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:41:59,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-09-20 21:41:59,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:41:59,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:41:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-09-20 21:41:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:42:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:42:00,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:42:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:42:00,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697737265] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:42:00,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:42:00,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 32 [2022-09-20 21:42:00,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728847906] [2022-09-20 21:42:00,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:42:00,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-09-20 21:42:00,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:42:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-09-20 21:42:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-09-20 21:42:00,329 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:42:00,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1138 places, 3001 transitions, 93836 flow. Second operand has 32 states, 32 states have (on average 50.84375) internal successors, (1627), 32 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:00,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:42:00,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:42:00,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:42:06,043 INFO L130 PetriNetUnfolder]: 2202/5686 cut-off events. [2022-09-20 21:42:06,043 INFO L131 PetriNetUnfolder]: For 317026/317026 co-relation queries the response was YES. [2022-09-20 21:42:06,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72537 conditions, 5686 events. 2202/5686 cut-off events. For 317026/317026 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 50885 event pairs, 130 based on Foata normal form. 2/5651 useless extension candidates. Maximal degree in co-relation 72285. Up to 1709 conditions per place. [2022-09-20 21:42:06,184 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 1530 selfloop transitions, 1495 changer transitions 12/3076 dead transitions. [2022-09-20 21:42:06,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1169 places, 3076 transitions, 101965 flow [2022-09-20 21:42:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-09-20 21:42:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-09-20 21:42:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1980 transitions. [2022-09-20 21:42:06,186 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6150978564771669 [2022-09-20 21:42:06,186 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1980 transitions. [2022-09-20 21:42:06,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1980 transitions. [2022-09-20 21:42:06,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:42:06,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1980 transitions. [2022-09-20 21:42:06,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 53.513513513513516) internal successors, (1980), 37 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:06,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:06,189 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 87.0) internal successors, (3306), 38 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:06,189 INFO L175 Difference]: Start difference. First operand has 1138 places, 3001 transitions, 93836 flow. Second operand 37 states and 1980 transitions. [2022-09-20 21:42:06,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1169 places, 3076 transitions, 101965 flow [2022-09-20 21:42:10,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1141 places, 3076 transitions, 99847 flow, removed 24 selfloop flow, removed 28 redundant places. [2022-09-20 21:42:10,344 INFO L231 Difference]: Finished difference. Result has 1150 places, 3021 transitions, 95561 flow [2022-09-20 21:42:10,346 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=91725, PETRI_DIFFERENCE_MINUEND_PLACES=1105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=95561, PETRI_PLACES=1150, PETRI_TRANSITIONS=3021} [2022-09-20 21:42:10,347 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 1073 predicate places. [2022-09-20 21:42:10,347 INFO L495 AbstractCegarLoop]: Abstraction has has 1150 places, 3021 transitions, 95561 flow [2022-09-20 21:42:10,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 50.84375) internal successors, (1627), 32 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:10,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:42:10,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:42:10,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-09-20 21:42:10,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-09-20 21:42:10,551 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:42:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:42:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1726789207, now seen corresponding path program 23 times [2022-09-20 21:42:10,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:42:10,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545991711] [2022-09-20 21:42:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:42:10,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:42:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:42:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:42:10,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:42:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545991711] [2022-09-20 21:42:10,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545991711] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:42:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493252141] [2022-09-20 21:42:10,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:42:10,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:42:10,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:42:10,679 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:42:10,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-09-20 21:42:10,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:42:10,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:42:10,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-09-20 21:42:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:42:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:42:10,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:42:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:42:11,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493252141] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:42:11,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:42:11,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-09-20 21:42:11,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530110417] [2022-09-20 21:42:11,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:42:11,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:42:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:42:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:42:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:42:11,251 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:42:11,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1150 places, 3021 transitions, 95561 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:11,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:42:11,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:42:11,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:42:19,626 INFO L130 PetriNetUnfolder]: 3004/7562 cut-off events. [2022-09-20 21:42:19,626 INFO L131 PetriNetUnfolder]: For 430039/430039 co-relation queries the response was YES. [2022-09-20 21:42:19,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99354 conditions, 7562 events. 3004/7562 cut-off events. For 430039/430039 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 69797 event pairs, 87 based on Foata normal form. 6/7540 useless extension candidates. Maximal degree in co-relation 99096. Up to 1059 conditions per place. [2022-09-20 21:42:19,851 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 867 selfloop transitions, 3560 changer transitions 14/4480 dead transitions. [2022-09-20 21:42:19,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1218 places, 4480 transitions, 150013 flow [2022-09-20 21:42:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-09-20 21:42:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-09-20 21:42:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3952 transitions. [2022-09-20 21:42:19,854 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6056704980842912 [2022-09-20 21:42:19,854 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3952 transitions. [2022-09-20 21:42:19,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3952 transitions. [2022-09-20 21:42:19,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:42:19,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3952 transitions. [2022-09-20 21:42:19,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 52.693333333333335) internal successors, (3952), 75 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:19,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:19,861 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:19,861 INFO L175 Difference]: Start difference. First operand has 1150 places, 3021 transitions, 95561 flow. Second operand 75 states and 3952 transitions. [2022-09-20 21:42:19,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1218 places, 4480 transitions, 150013 flow [2022-09-20 21:42:26,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1192 places, 4480 transitions, 147865 flow, removed 25 selfloop flow, removed 26 redundant places. [2022-09-20 21:42:26,860 INFO L231 Difference]: Finished difference. Result has 1222 places, 4413 transitions, 148450 flow [2022-09-20 21:42:26,862 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=94070, PETRI_DIFFERENCE_MINUEND_PLACES=1118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=148450, PETRI_PLACES=1222, PETRI_TRANSITIONS=4413} [2022-09-20 21:42:26,863 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 1145 predicate places. [2022-09-20 21:42:26,863 INFO L495 AbstractCegarLoop]: Abstraction has has 1222 places, 4413 transitions, 148450 flow [2022-09-20 21:42:26,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:26,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:42:26,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:42:26,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-09-20 21:42:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:42:27,068 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:42:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:42:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash 532223841, now seen corresponding path program 24 times [2022-09-20 21:42:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:42:27,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129013292] [2022-09-20 21:42:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:42:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:42:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:42:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:42:27,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:42:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129013292] [2022-09-20 21:42:27,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129013292] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:42:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723385677] [2022-09-20 21:42:27,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:42:27,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:42:27,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:42:27,180 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:42:27,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-09-20 21:42:27,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-09-20 21:42:27,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:42:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:42:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:42:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:42:27,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:42:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:42:27,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723385677] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:42:27,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:42:27,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-09-20 21:42:27,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991294693] [2022-09-20 21:42:27,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:42:27,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-09-20 21:42:27,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:42:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-09-20 21:42:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-09-20 21:42:27,781 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:42:27,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1222 places, 4413 transitions, 148450 flow. Second operand has 31 states, 31 states have (on average 50.806451612903224) internal successors, (1575), 31 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) [2022-09-20 21:42:27,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:42:27,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:42:27,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:42:50,651 INFO L130 PetriNetUnfolder]: 4759/11196 cut-off events. [2022-09-20 21:42:50,652 INFO L131 PetriNetUnfolder]: For 714785/714795 co-relation queries the response was YES. [2022-09-20 21:42:50,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162481 conditions, 11196 events. 4759/11196 cut-off events. For 714785/714795 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 106635 event pairs, 62 based on Foata normal form. 5/11171 useless extension candidates. Maximal degree in co-relation 162198. Up to 1582 conditions per place. [2022-09-20 21:42:50,980 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 1739 selfloop transitions, 5500 changer transitions 14/7292 dead transitions. [2022-09-20 21:42:50,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1351 places, 7292 transitions, 258099 flow [2022-09-20 21:42:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-09-20 21:42:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2022-09-20 21:42:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 7084 transitions. [2022-09-20 21:42:50,984 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6122202056866304 [2022-09-20 21:42:50,984 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 7084 transitions. [2022-09-20 21:42:50,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 7084 transitions. [2022-09-20 21:42:50,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:42:50,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 7084 transitions. [2022-09-20 21:42:50,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 53.26315789473684) internal successors, (7084), 133 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:50,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:50,996 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:42:50,996 INFO L175 Difference]: Start difference. First operand has 1222 places, 4413 transitions, 148450 flow. Second operand 133 states and 7084 transitions. [2022-09-20 21:42:50,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1351 places, 7292 transitions, 258099 flow [2022-09-20 21:43:10,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1341 places, 7292 transitions, 251458 flow, removed 1967 selfloop flow, removed 10 redundant places. [2022-09-20 21:43:10,451 INFO L231 Difference]: Finished difference. Result has 1397 places, 6766 transitions, 245749 flow [2022-09-20 21:43:10,454 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=145489, PETRI_DIFFERENCE_MINUEND_PLACES=1209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=245749, PETRI_PLACES=1397, PETRI_TRANSITIONS=6766} [2022-09-20 21:43:10,454 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 1320 predicate places. [2022-09-20 21:43:10,454 INFO L495 AbstractCegarLoop]: Abstraction has has 1397 places, 6766 transitions, 245749 flow [2022-09-20 21:43:10,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 50.806451612903224) internal successors, (1575), 31 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) [2022-09-20 21:43:10,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:43:10,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:43:10,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-09-20 21:43:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:43:10,671 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:43:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:43:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1136643763, now seen corresponding path program 25 times [2022-09-20 21:43:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:43:10,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110048282] [2022-09-20 21:43:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:43:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:43:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:43:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:43:10,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:43:10,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110048282] [2022-09-20 21:43:10,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110048282] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:43:10,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910507343] [2022-09-20 21:43:10,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:43:10,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:43:10,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:43:10,800 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:43:10,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-09-20 21:43:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:43:10,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:43:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:43:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:43:11,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:43:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:43:11,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910507343] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:43:11,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:43:11,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-09-20 21:43:11,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253482287] [2022-09-20 21:43:11,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:43:11,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:43:11,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:43:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:43:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:43:11,427 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:43:11,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1397 places, 6766 transitions, 245749 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:43:11,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:43:11,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:43:11,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:43:55,258 INFO L130 PetriNetUnfolder]: 5890/13638 cut-off events. [2022-09-20 21:43:55,258 INFO L131 PetriNetUnfolder]: For 847493/847505 co-relation queries the response was YES. [2022-09-20 21:43:55,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205922 conditions, 13638 events. 5890/13638 cut-off events. For 847493/847505 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 133603 event pairs, 147 based on Foata normal form. 9/13594 useless extension candidates. Maximal degree in co-relation 205589. Up to 2411 conditions per place. [2022-09-20 21:43:55,730 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 2756 selfloop transitions, 5903 changer transitions 34/8732 dead transitions. [2022-09-20 21:43:55,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1512 places, 8732 transitions, 331197 flow [2022-09-20 21:43:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-09-20 21:43:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2022-09-20 21:43:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 6316 transitions. [2022-09-20 21:43:55,734 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.610064715541389 [2022-09-20 21:43:55,734 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 6316 transitions. [2022-09-20 21:43:55,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 6316 transitions. [2022-09-20 21:43:55,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:43:55,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 6316 transitions. [2022-09-20 21:43:55,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 53.075630252100844) internal successors, (6316), 119 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:43:55,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 87.0) internal successors, (10440), 120 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:43:55,744 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 87.0) internal successors, (10440), 120 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:43:55,744 INFO L175 Difference]: Start difference. First operand has 1397 places, 6766 transitions, 245749 flow. Second operand 119 states and 6316 transitions. [2022-09-20 21:43:55,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1512 places, 8732 transitions, 331197 flow [2022-09-20 21:44:28,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1495 places, 8732 transitions, 328835 flow, removed 525 selfloop flow, removed 17 redundant places. [2022-09-20 21:44:28,739 INFO L231 Difference]: Finished difference. Result has 1542 places, 8226 transitions, 318298 flow [2022-09-20 21:44:28,744 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=243926, PETRI_DIFFERENCE_MINUEND_PLACES=1377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=318298, PETRI_PLACES=1542, PETRI_TRANSITIONS=8226} [2022-09-20 21:44:28,744 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 1465 predicate places. [2022-09-20 21:44:28,744 INFO L495 AbstractCegarLoop]: Abstraction has has 1542 places, 8226 transitions, 318298 flow [2022-09-20 21:44:28,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:44:28,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:44:28,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:44:28,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-09-20 21:44:28,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:44:28,945 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:44:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:44:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1691970271, now seen corresponding path program 26 times [2022-09-20 21:44:28,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:44:28,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597053161] [2022-09-20 21:44:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:44:28,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:44:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:44:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:44:29,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:44:29,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597053161] [2022-09-20 21:44:29,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597053161] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:44:29,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367199083] [2022-09-20 21:44:29,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:44:29,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:44:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:44:29,057 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:44:29,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-09-20 21:44:29,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:44:29,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:44:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:44:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:44:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:44:29,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:44:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:44:29,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367199083] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:44:29,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:44:29,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-09-20 21:44:29,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255025681] [2022-09-20 21:44:29,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:44:29,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:44:29,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:44:29,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:44:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:44:29,611 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:44:29,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1542 places, 8226 transitions, 318298 flow. Second operand has 33 states, 33 states have (on average 50.696969696969695) internal successors, (1673), 33 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:44:29,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:44:29,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:44:29,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:45:40,143 INFO L130 PetriNetUnfolder]: 7810/17707 cut-off events. [2022-09-20 21:45:40,143 INFO L131 PetriNetUnfolder]: For 1252829/1252841 co-relation queries the response was YES. [2022-09-20 21:45:40,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284334 conditions, 17707 events. 7810/17707 cut-off events. For 1252829/1252841 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 178658 event pairs, 193 based on Foata normal form. 8/17629 useless extension candidates. Maximal degree in co-relation 283958. Up to 2748 conditions per place. [2022-09-20 21:45:41,002 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 2485 selfloop transitions, 8745 changer transitions 120/11389 dead transitions. [2022-09-20 21:45:41,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1682 places, 11389 transitions, 460113 flow [2022-09-20 21:45:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-09-20 21:45:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2022-09-20 21:45:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 7916 transitions. [2022-09-20 21:45:41,007 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6065900383141762 [2022-09-20 21:45:41,007 INFO L72 ComplementDD]: Start complementDD. Operand 150 states and 7916 transitions. [2022-09-20 21:45:41,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 7916 transitions. [2022-09-20 21:45:41,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:45:41,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 150 states and 7916 transitions. [2022-09-20 21:45:41,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 151 states, 150 states have (on average 52.77333333333333) internal successors, (7916), 150 states have internal predecessors, (7916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:45:41,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 151 states, 151 states have (on average 87.0) internal successors, (13137), 151 states have internal predecessors, (13137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:45:41,019 INFO L81 ComplementDD]: Finished complementDD. Result has 151 states, 151 states have (on average 87.0) internal successors, (13137), 151 states have internal predecessors, (13137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:45:41,019 INFO L175 Difference]: Start difference. First operand has 1542 places, 8226 transitions, 318298 flow. Second operand 150 states and 7916 transitions. [2022-09-20 21:45:41,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1682 places, 11389 transitions, 460113 flow [2022-09-20 21:46:47,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1666 places, 11389 transitions, 457069 flow, removed 383 selfloop flow, removed 16 redundant places. [2022-09-20 21:46:47,880 INFO L231 Difference]: Finished difference. Result has 1711 places, 10757 transitions, 444261 flow [2022-09-20 21:46:47,885 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=316006, PETRI_DIFFERENCE_MINUEND_PLACES=1517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=150, PETRI_FLOW=444261, PETRI_PLACES=1711, PETRI_TRANSITIONS=10757} [2022-09-20 21:46:47,886 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 1634 predicate places. [2022-09-20 21:46:47,886 INFO L495 AbstractCegarLoop]: Abstraction has has 1711 places, 10757 transitions, 444261 flow [2022-09-20 21:46:47,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.696969696969695) internal successors, (1673), 33 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:46:47,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:46:47,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:46:47,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-09-20 21:46:48,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-09-20 21:46:48,087 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:46:48,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:46:48,087 INFO L85 PathProgramCache]: Analyzing trace with hash 910635591, now seen corresponding path program 27 times [2022-09-20 21:46:48,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:46:48,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437920981] [2022-09-20 21:46:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:46:48,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:46:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:46:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:46:48,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:46:48,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437920981] [2022-09-20 21:46:48,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437920981] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:46:48,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424044445] [2022-09-20 21:46:48,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:46:48,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:46:48,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:46:48,208 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:46:48,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-09-20 21:46:48,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 21:46:48,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:46:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 21:46:48,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:46:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:46:48,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:46:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:46:48,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424044445] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:46:48,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:46:48,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-09-20 21:46:48,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267819357] [2022-09-20 21:46:48,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:46:48,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:46:48,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:46:48,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:46:48,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:46:48,823 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:46:48,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1711 places, 10757 transitions, 444261 flow. Second operand has 33 states, 33 states have (on average 50.75757575757576) internal successors, (1675), 33 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:46:48,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:46:48,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:46:48,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:49:03,999 INFO L130 PetriNetUnfolder]: 11169/24793 cut-off events. [2022-09-20 21:49:03,999 INFO L131 PetriNetUnfolder]: For 1953932/1953941 co-relation queries the response was YES. [2022-09-20 21:49:07,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424615 conditions, 24793 events. 11169/24793 cut-off events. For 1953932/1953941 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 259268 event pairs, 274 based on Foata normal form. 6/24674 useless extension candidates. Maximal degree in co-relation 424202. Up to 4062 conditions per place. [2022-09-20 21:49:07,454 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 3455 selfloop transitions, 12734 changer transitions 82/16310 dead transitions. [2022-09-20 21:49:07,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1903 places, 16310 transitions, 698399 flow [2022-09-20 21:49:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-09-20 21:49:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2022-09-20 21:49:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 10460 transitions. [2022-09-20 21:49:07,460 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6041702766707099 [2022-09-20 21:49:07,460 INFO L72 ComplementDD]: Start complementDD. Operand 199 states and 10460 transitions. [2022-09-20 21:49:07,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 199 states and 10460 transitions. [2022-09-20 21:49:07,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:49:07,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 199 states and 10460 transitions. [2022-09-20 21:49:07,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 200 states, 199 states have (on average 52.562814070351756) internal successors, (10460), 199 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:49:07,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 200 states, 200 states have (on average 87.0) internal successors, (17400), 200 states have internal predecessors, (17400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:49:07,479 INFO L81 ComplementDD]: Finished complementDD. Result has 200 states, 200 states have (on average 87.0) internal successors, (17400), 200 states have internal predecessors, (17400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:49:07,480 INFO L175 Difference]: Start difference. First operand has 1711 places, 10757 transitions, 444261 flow. Second operand 199 states and 10460 transitions. [2022-09-20 21:49:07,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1903 places, 16310 transitions, 698399 flow [2022-09-20 21:51:16,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1872 places, 16310 transitions, 693316 flow, removed 1466 selfloop flow, removed 31 redundant places. [2022-09-20 21:51:17,590 INFO L231 Difference]: Finished difference. Result has 1928 places, 15506 transitions, 676269 flow [2022-09-20 21:51:17,597 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=441216, PETRI_DIFFERENCE_MINUEND_PLACES=1674, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=199, PETRI_FLOW=676269, PETRI_PLACES=1928, PETRI_TRANSITIONS=15506} [2022-09-20 21:51:17,598 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 1851 predicate places. [2022-09-20 21:51:17,598 INFO L495 AbstractCegarLoop]: Abstraction has has 1928 places, 15506 transitions, 676269 flow [2022-09-20 21:51:17,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.75757575757576) internal successors, (1675), 33 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:51:17,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:51:17,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:51:17,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-09-20 21:51:17,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-09-20 21:51:17,823 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:51:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:51:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash 700999695, now seen corresponding path program 28 times [2022-09-20 21:51:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:51:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304786068] [2022-09-20 21:51:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:51:17,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:51:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:51:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:51:17,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:51:17,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304786068] [2022-09-20 21:51:17,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304786068] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:51:17,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323375027] [2022-09-20 21:51:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:51:17,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:51:17,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:51:17,950 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:51:17,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-09-20 21:51:18,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:51:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:51:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-09-20 21:51:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:51:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:51:18,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:51:18,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323375027] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:51:18,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:51:18,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 21 [2022-09-20 21:51:18,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114957254] [2022-09-20 21:51:18,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:51:18,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-09-20 21:51:18,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:51:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-09-20 21:51:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-09-20 21:51:18,187 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-09-20 21:51:18,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1928 places, 15506 transitions, 676269 flow. Second operand has 15 states, 15 states have (on average 51.06666666666667) internal successors, (766), 15 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:51:18,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:51:18,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-09-20 21:51:18,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-09-20 21:53:16,021 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 [2022-09-20 21:53:16,021 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-09-20 21:53:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-09-20 21:53:16,458 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-09-20 21:53:16,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-09-20 21:53:16,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:53:16,659 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (15states, 49/87 universal loopers) in iteration 61,while PetriNetUnfolder was constructing finite prefix that currently has 272986 conditions, 14241 events (6300/14240 cut-off events. For 1301412/1301424 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 157930 event pairs, 27 based on Foata normal form. 90/15835 useless extension candidates. Maximal degree in co-relation 272523. Up to 7437 conditions per place.). [2022-09-20 21:53:16,662 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-09-20 21:53:16,662 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-09-20 21:53:16,662 INFO L444 BasicCegarLoop]: Path program histogram: [28, 20, 6, 6, 1] [2022-09-20 21:53:16,665 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 21:53:16,665 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 21:53:16,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 09:53:16 BasicIcfg [2022-09-20 21:53:16,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 21:53:16,668 INFO L158 Benchmark]: Toolchain (without parser) took 825507.61ms. Allocated memory was 206.6MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 151.0MB in the beginning and 724.4MB in the end (delta: -573.3MB). Peak memory consumption was 3.6GB. Max. memory is 8.0GB. [2022-09-20 21:53:16,668 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 206.6MB. Free memory is still 167.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 21:53:16,668 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.98ms. Allocated memory was 206.6MB in the beginning and 248.5MB in the end (delta: 41.9MB). Free memory was 150.8MB in the beginning and 223.6MB in the end (delta: -72.8MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-09-20 21:53:16,668 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.34ms. Allocated memory is still 248.5MB. Free memory was 223.6MB in the beginning and 222.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 21:53:16,668 INFO L158 Benchmark]: Boogie Preprocessor took 14.12ms. Allocated memory is still 248.5MB. Free memory was 222.1MB in the beginning and 221.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 21:53:16,668 INFO L158 Benchmark]: RCFGBuilder took 220.37ms. Allocated memory is still 248.5MB. Free memory was 221.0MB in the beginning and 208.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-09-20 21:53:16,669 INFO L158 Benchmark]: TraceAbstraction took 825066.91ms. Allocated memory was 248.5MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 207.9MB in the beginning and 724.4MB in the end (delta: -516.4MB). Peak memory consumption was 3.6GB. Max. memory is 8.0GB. [2022-09-20 21:53:16,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 206.6MB. Free memory is still 167.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 179.98ms. Allocated memory was 206.6MB in the beginning and 248.5MB in the end (delta: 41.9MB). Free memory was 150.8MB in the beginning and 223.6MB in the end (delta: -72.8MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.34ms. Allocated memory is still 248.5MB. Free memory was 223.6MB in the beginning and 222.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.12ms. Allocated memory is still 248.5MB. Free memory was 222.1MB in the beginning and 221.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 220.37ms. Allocated memory is still 248.5MB. Free memory was 221.0MB in the beginning and 208.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 825066.91ms. Allocated memory was 248.5MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 207.9MB in the beginning and 724.4MB in the end (delta: -516.4MB). Peak memory consumption was 3.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (15states, 49/87 universal loopers) in iteration 61,while PetriNetUnfolder was constructing finite prefix that currently has 272986 conditions, 14241 events (6300/14240 cut-off events. For 1301412/1301424 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 157930 event pairs, 27 based on Foata normal form. 90/15835 useless extension candidates. Maximal degree in co-relation 272523. Up to 7437 conditions per place.). - TimeoutResultAtElement [Line: 74]: 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 (15states, 49/87 universal loopers) in iteration 61,while PetriNetUnfolder was constructing finite prefix that currently has 272986 conditions, 14241 events (6300/14240 cut-off events. For 1301412/1301424 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 157930 event pairs, 27 based on Foata normal form. 90/15835 useless extension candidates. Maximal degree in co-relation 272523. Up to 7437 conditions per place.). - TimeoutResultAtElement [Line: 73]: 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 (15states, 49/87 universal loopers) in iteration 61,while PetriNetUnfolder was constructing finite prefix that currently has 272986 conditions, 14241 events (6300/14240 cut-off events. For 1301412/1301424 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 157930 event pairs, 27 based on Foata normal form. 90/15835 useless extension candidates. Maximal degree in co-relation 272523. Up to 7437 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 104 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: 825.0s, OverallIterations: 61, TraceHistogramMax: 1, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 794.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11911 SdHoareTripleChecker+Valid, 15.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11911 mSDsluCounter, 18594 SdHoareTripleChecker+Invalid, 13.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21089 mSDsCounter, 2976 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39879 IncrementalHoareTripleChecker+Invalid, 42855 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2976 mSolverCounterUnsat, 1888 mSDtfsCounter, 39879 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7242 GetRequests, 3672 SyntacticMatches, 105 SemanticMatches, 3465 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156500 ImplicationChecksByTransitivity, 72.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=676269occurred in iteration=60, InterpolantAutomatonStates: 2843, 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: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 6278 NumberOfCodeBlocks, 6278 NumberOfCodeBlocksAsserted, 123 NumberOfCheckSat, 8101 ConstructedInterpolants, 0 QuantifiedInterpolants, 44138 SizeOfPredicates, 281 NumberOfNonLiveVariables, 4968 ConjunctsInSsa, 580 ConjunctsInUnsatCore, 121 InterpolantComputations, 37 PerfectInterpolantSequences, 26/180 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