/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-commit-2.wvr-bad_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:03:05,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:03:05,652 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:03:05,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:03:05,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:03:05,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:03:05,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:03:05,694 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:03:05,695 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:03:05,695 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:03:05,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:03:05,696 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:03:05,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:03:05,697 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:03:05,697 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:03:05,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:03:05,697 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:03:05,698 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:03:05,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:03:05,698 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:03:05,698 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:03:05,700 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:03:05,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:03:05,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:03:05,701 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:03:05,701 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:03:05,701 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:03:05,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:03:05,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:03:05,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:03:05,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:03:05,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:03:05,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:03:05,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:03:05,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:03:05,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:03:05,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:03:05,704 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:03:05,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:03:05,704 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:03:05,704 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:03:05,706 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:03:05,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:03:05,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:03:05,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:03:05,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:03:05,970 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:03:05,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-commit-2.wvr-bad_bound2.c [2023-08-04 09:03:07,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:03:07,302 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:03:07,302 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-commit-2.wvr-bad_bound2.c [2023-08-04 09:03:07,315 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566b3f132/60bc2ae1bc09454383c25f4eaf084881/FLAGb4113a206 [2023-08-04 09:03:07,331 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566b3f132/60bc2ae1bc09454383c25f4eaf084881 [2023-08-04 09:03:07,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:03:07,339 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:03:07,341 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:03:07,341 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:03:07,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:03:07,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52340603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07, skipping insertion in model container [2023-08-04 09:03:07,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,375 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:03:07,606 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-commit-2.wvr-bad_bound2.c[7011,7024] [2023-08-04 09:03:07,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:03:07,621 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:03:07,662 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-commit-2.wvr-bad_bound2.c[7011,7024] [2023-08-04 09:03:07,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:03:07,674 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:03:07,675 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:03:07,681 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:03:07,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07 WrapperNode [2023-08-04 09:03:07,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:03:07,682 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:03:07,682 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:03:07,682 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:03:07,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,746 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 542 [2023-08-04 09:03:07,747 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:03:07,748 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:03:07,748 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:03:07,748 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:03:07,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,760 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,773 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,782 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:03:07,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:03:07,789 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:03:07,789 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:03:07,790 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (1/1) ... [2023-08-04 09:03:07,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:03:07,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:07,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 09:03:07,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:03:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:03:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:03:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:03:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:03:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:03:07,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:03:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:03:07,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:03:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:03:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:03:07,871 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:03:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:03:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:03:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:03:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:03:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:03:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:03:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:03:07,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:03:07,874 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:03:08,026 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:03:08,028 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:03:08,676 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:03:08,887 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:03:08,888 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-04 09:03:08,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:03:08 BoogieIcfgContainer [2023-08-04 09:03:08,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:03:08,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:03:08,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:03:08,898 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:03:08,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:03:07" (1/3) ... [2023-08-04 09:03:08,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4c0d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:03:08, skipping insertion in model container [2023-08-04 09:03:08,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:07" (2/3) ... [2023-08-04 09:03:08,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4c0d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:03:08, skipping insertion in model container [2023-08-04 09:03:08,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:03:08" (3/3) ... [2023-08-04 09:03:08,901 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-commit-2.wvr-bad_bound2.c [2023-08-04 09:03:08,909 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:03:08,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:03:08,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:03:08,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:03:09,039 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:03:09,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:09,433 INFO L124 PetriNetUnfolderBase]: 318/1751 cut-off events. [2023-08-04 09:03:09,434 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:03:09,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1929 conditions, 1751 events. 318/1751 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10618 event pairs, 0 based on Foata normal form. 0/1451 useless extension candidates. Maximal degree in co-relation 1076. Up to 33 conditions per place. [2023-08-04 09:03:09,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:09,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:09,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:09,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:09,496 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:09,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:09,867 INFO L124 PetriNetUnfolderBase]: 318/1751 cut-off events. [2023-08-04 09:03:09,868 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:03:09,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1929 conditions, 1751 events. 318/1751 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10618 event pairs, 0 based on Foata normal form. 0/1451 useless extension candidates. Maximal degree in co-relation 1076. Up to 33 conditions per place. [2023-08-04 09:03:09,924 INFO L119 LiptonReduction]: Number of co-enabled transitions 17600 [2023-08-04 09:03:22,748 INFO L134 LiptonReduction]: Checked pairs total: 25371 [2023-08-04 09:03:22,748 INFO L136 LiptonReduction]: Total number of compositions: 420 [2023-08-04 09:03:22,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:03:22,766 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52b5ffe0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:22,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:03:22,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:22,782 INFO L124 PetriNetUnfolderBase]: 11/72 cut-off events. [2023-08-04 09:03:22,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:22,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:22,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:22,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:22,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash 404812225, now seen corresponding path program 1 times [2023-08-04 09:03:22,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:22,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787615113] [2023-08-04 09:03:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:22,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:03:23,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787615113] [2023-08-04 09:03:23,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787615113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:23,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:23,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:03:23,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034477638] [2023-08-04 09:03:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:23,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:23,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:23,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:03:23,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 837 [2023-08-04 09:03:23,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 70 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:23,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:23,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 837 [2023-08-04 09:03:23,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:24,591 INFO L124 PetriNetUnfolderBase]: 3528/5049 cut-off events. [2023-08-04 09:03:24,591 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2023-08-04 09:03:24,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10330 conditions, 5049 events. 3528/5049 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 22233 event pairs, 1121 based on Foata normal form. 0/3068 useless extension candidates. Maximal degree in co-relation 7488. Up to 4733 conditions per place. [2023-08-04 09:03:24,620 INFO L140 encePairwiseOnDemand]: 833/837 looper letters, 61 selfloop transitions, 2 changer transitions 5/72 dead transitions. [2023-08-04 09:03:24,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 340 flow [2023-08-04 09:03:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1131 transitions. [2023-08-04 09:03:24,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041816009557945 [2023-08-04 09:03:24,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1131 transitions. [2023-08-04 09:03:24,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1131 transitions. [2023-08-04 09:03:24,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:24,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1131 transitions. [2023-08-04 09:03:24,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:24,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:24,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:24,658 INFO L175 Difference]: Start difference. First operand has 55 places, 70 transitions, 208 flow. Second operand 3 states and 1131 transitions. [2023-08-04 09:03:24,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 340 flow [2023-08-04 09:03:24,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 340 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:03:24,667 INFO L231 Difference]: Finished difference. Result has 57 places, 65 transitions, 198 flow [2023-08-04 09:03:24,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=57, PETRI_TRANSITIONS=65} [2023-08-04 09:03:24,671 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 09:03:24,671 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 65 transitions, 198 flow [2023-08-04 09:03:24,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:24,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:24,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:24,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:03:24,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:24,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash -161510787, now seen corresponding path program 1 times [2023-08-04 09:03:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:24,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819234659] [2023-08-04 09:03:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:24,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:03:24,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:24,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819234659] [2023-08-04 09:03:24,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819234659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:24,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101652584] [2023-08-04 09:03:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:24,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:24,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:24,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:24,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:03:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:24,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:24,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:03:24,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:24,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101652584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:24,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:24,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:24,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524684782] [2023-08-04 09:03:24,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:24,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:24,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:24,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:24,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:24,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 837 [2023-08-04 09:03:24,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 65 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:24,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:24,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 837 [2023-08-04 09:03:24,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:26,050 INFO L124 PetriNetUnfolderBase]: 3374/4779 cut-off events. [2023-08-04 09:03:26,051 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2023-08-04 09:03:26,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 4779 events. 3374/4779 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20206 event pairs, 1100 based on Foata normal form. 0/2899 useless extension candidates. Maximal degree in co-relation 9738. Up to 4502 conditions per place. [2023-08-04 09:03:26,074 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 63 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 09:03:26,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 340 flow [2023-08-04 09:03:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2023-08-04 09:03:26,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45081640780565513 [2023-08-04 09:03:26,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2023-08-04 09:03:26,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2023-08-04 09:03:26,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:26,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2023-08-04 09:03:26,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:26,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:26,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:26,087 INFO L175 Difference]: Start difference. First operand has 57 places, 65 transitions, 198 flow. Second operand 3 states and 1132 transitions. [2023-08-04 09:03:26,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 340 flow [2023-08-04 09:03:26,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-04 09:03:26,092 INFO L231 Difference]: Finished difference. Result has 50 places, 65 transitions, 182 flow [2023-08-04 09:03:26,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=50, PETRI_TRANSITIONS=65} [2023-08-04 09:03:26,093 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2023-08-04 09:03:26,093 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 65 transitions, 182 flow [2023-08-04 09:03:26,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:26,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:26,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:26,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:26,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:26,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:26,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:26,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1298191209, now seen corresponding path program 1 times [2023-08-04 09:03:26,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:26,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035048116] [2023-08-04 09:03:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:26,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:03:26,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:26,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035048116] [2023-08-04 09:03:26,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035048116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:26,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944600777] [2023-08-04 09:03:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:26,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:26,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:26,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:26,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:03:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:26,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:26,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:03:26,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:26,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944600777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:26,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:26,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:26,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505675925] [2023-08-04 09:03:26,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:26,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:26,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:26,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:26,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:26,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 837 [2023-08-04 09:03:26,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 65 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:26,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:26,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 837 [2023-08-04 09:03:26,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:27,661 INFO L124 PetriNetUnfolderBase]: 3278/4651 cut-off events. [2023-08-04 09:03:27,662 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 09:03:27,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9516 conditions, 4651 events. 3278/4651 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19301 event pairs, 1091 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 5381. Up to 4340 conditions per place. [2023-08-04 09:03:27,686 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 65 selfloop transitions, 2 changer transitions 1/72 dead transitions. [2023-08-04 09:03:27,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 332 flow [2023-08-04 09:03:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1134 transitions. [2023-08-04 09:03:27,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-08-04 09:03:27,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1134 transitions. [2023-08-04 09:03:27,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1134 transitions. [2023-08-04 09:03:27,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:27,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1134 transitions. [2023-08-04 09:03:27,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:27,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:27,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:27,700 INFO L175 Difference]: Start difference. First operand has 50 places, 65 transitions, 182 flow. Second operand 3 states and 1134 transitions. [2023-08-04 09:03:27,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 332 flow [2023-08-04 09:03:27,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:27,705 INFO L231 Difference]: Finished difference. Result has 51 places, 65 transitions, 186 flow [2023-08-04 09:03:27,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=51, PETRI_TRANSITIONS=65} [2023-08-04 09:03:27,706 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -4 predicate places. [2023-08-04 09:03:27,707 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 65 transitions, 186 flow [2023-08-04 09:03:27,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:27,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:27,707 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] [2023-08-04 09:03:27,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:27,914 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,SelfDestructingSolverStorable2 [2023-08-04 09:03:27,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:27,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:27,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1313116963, now seen corresponding path program 1 times [2023-08-04 09:03:27,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:27,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254302780] [2023-08-04 09:03:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:27,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:03:28,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254302780] [2023-08-04 09:03:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254302780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737251189] [2023-08-04 09:03:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:28,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:28,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:28,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:28,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:03:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:28,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:28,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:28,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:28,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737251189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:28,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:28,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:28,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695787966] [2023-08-04 09:03:28,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:28,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:28,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:28,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:28,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 837 [2023-08-04 09:03:28,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 65 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 362.3333333333333) internal successors, (1087), 3 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:28,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:28,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 837 [2023-08-04 09:03:28,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:29,172 INFO L124 PetriNetUnfolderBase]: 3270/4643 cut-off events. [2023-08-04 09:03:29,172 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-04 09:03:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9523 conditions, 4643 events. 3270/4643 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 18616 event pairs, 1102 based on Foata normal form. 0/2843 useless extension candidates. Maximal degree in co-relation 5385. Up to 4248 conditions per place. [2023-08-04 09:03:29,193 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 67 selfloop transitions, 2 changer transitions 1/74 dead transitions. [2023-08-04 09:03:29,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 344 flow [2023-08-04 09:03:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1136 transitions. [2023-08-04 09:03:29,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524093986459578 [2023-08-04 09:03:29,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1136 transitions. [2023-08-04 09:03:29,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1136 transitions. [2023-08-04 09:03:29,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:29,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1136 transitions. [2023-08-04 09:03:29,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:29,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:29,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:29,213 INFO L175 Difference]: Start difference. First operand has 51 places, 65 transitions, 186 flow. Second operand 3 states and 1136 transitions. [2023-08-04 09:03:29,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 344 flow [2023-08-04 09:03:29,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 74 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:29,216 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 190 flow [2023-08-04 09:03:29,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2023-08-04 09:03:29,217 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-08-04 09:03:29,217 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 190 flow [2023-08-04 09:03:29,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 362.3333333333333) internal successors, (1087), 3 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:29,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:29,218 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] [2023-08-04 09:03:29,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:29,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:29,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:29,429 INFO L85 PathProgramCache]: Analyzing trace with hash -266139811, now seen corresponding path program 1 times [2023-08-04 09:03:29,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:29,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926608677] [2023-08-04 09:03:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:29,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:29,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926608677] [2023-08-04 09:03:29,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926608677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:29,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524882430] [2023-08-04 09:03:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:29,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:29,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:29,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:29,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:03:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:29,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:29,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:03:29,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:29,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524882430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:29,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:29,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:29,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870796207] [2023-08-04 09:03:29,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:29,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:29,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:29,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:29,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 837 [2023-08-04 09:03:29,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 363.3333333333333) internal successors, (1090), 3 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:29,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:29,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 837 [2023-08-04 09:03:29,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:30,485 INFO L124 PetriNetUnfolderBase]: 2438/3507 cut-off events. [2023-08-04 09:03:30,485 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 09:03:30,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7296 conditions, 3507 events. 2438/3507 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13449 event pairs, 972 based on Foata normal form. 0/2155 useless extension candidates. Maximal degree in co-relation 4311. Up to 3056 conditions per place. [2023-08-04 09:03:30,496 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 73 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 09:03:30,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 376 flow [2023-08-04 09:03:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1141 transitions. [2023-08-04 09:03:30,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544006371963361 [2023-08-04 09:03:30,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1141 transitions. [2023-08-04 09:03:30,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1141 transitions. [2023-08-04 09:03:30,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:30,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1141 transitions. [2023-08-04 09:03:30,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.3333333333333) internal successors, (1141), 3 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:30,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:30,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:30,510 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 190 flow. Second operand 3 states and 1141 transitions. [2023-08-04 09:03:30,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 376 flow [2023-08-04 09:03:30,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:30,513 INFO L231 Difference]: Finished difference. Result has 53 places, 66 transitions, 198 flow [2023-08-04 09:03:30,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=53, PETRI_TRANSITIONS=66} [2023-08-04 09:03:30,516 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -2 predicate places. [2023-08-04 09:03:30,516 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 66 transitions, 198 flow [2023-08-04 09:03:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 363.3333333333333) internal successors, (1090), 3 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:30,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:30,517 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] [2023-08-04 09:03:30,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:30,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:30,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:30,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash 57050776, now seen corresponding path program 1 times [2023-08-04 09:03:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:30,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574055624] [2023-08-04 09:03:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:30,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:03:30,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:30,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574055624] [2023-08-04 09:03:30,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574055624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077578310] [2023-08-04 09:03:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:30,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:30,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:30,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:30,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:03:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:30,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:30,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:03:30,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:30,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077578310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:30,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:30,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:30,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405433357] [2023-08-04 09:03:30,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:30,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:30,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:30,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:30,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:30,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 837 [2023-08-04 09:03:30,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:30,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:30,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 837 [2023-08-04 09:03:30,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:31,581 INFO L124 PetriNetUnfolderBase]: 1881/2778 cut-off events. [2023-08-04 09:03:31,582 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-08-04 09:03:31,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5964 conditions, 2778 events. 1881/2778 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10307 event pairs, 709 based on Foata normal form. 0/1815 useless extension candidates. Maximal degree in co-relation 3602. Up to 2088 conditions per place. [2023-08-04 09:03:31,593 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 74 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 09:03:31,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 80 transitions, 386 flow [2023-08-04 09:03:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1141 transitions. [2023-08-04 09:03:31,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544006371963361 [2023-08-04 09:03:31,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1141 transitions. [2023-08-04 09:03:31,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1141 transitions. [2023-08-04 09:03:31,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:31,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1141 transitions. [2023-08-04 09:03:31,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.3333333333333) internal successors, (1141), 3 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:31,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:31,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:31,607 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 198 flow. Second operand 3 states and 1141 transitions. [2023-08-04 09:03:31,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 80 transitions, 386 flow [2023-08-04 09:03:31,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:31,609 INFO L231 Difference]: Finished difference. Result has 55 places, 67 transitions, 208 flow [2023-08-04 09:03:31,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=55, PETRI_TRANSITIONS=67} [2023-08-04 09:03:31,610 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-04 09:03:31,610 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 67 transitions, 208 flow [2023-08-04 09:03:31,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:31,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:31,611 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] [2023-08-04 09:03:31,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:31,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:31,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:31,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:31,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1760821184, now seen corresponding path program 1 times [2023-08-04 09:03:31,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:31,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914117609] [2023-08-04 09:03:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:03:31,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:31,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914117609] [2023-08-04 09:03:31,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914117609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:31,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370383815] [2023-08-04 09:03:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:31,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:31,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:31,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:03:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:32,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:32,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:03:32,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:32,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370383815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:32,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:32,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:32,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244157133] [2023-08-04 09:03:32,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:32,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:32,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:32,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:32,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:32,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 837 [2023-08-04 09:03:32,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 67 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:32,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:32,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 837 [2023-08-04 09:03:32,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:32,601 INFO L124 PetriNetUnfolderBase]: 1716/2545 cut-off events. [2023-08-04 09:03:32,602 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2023-08-04 09:03:32,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5627 conditions, 2545 events. 1716/2545 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9191 event pairs, 770 based on Foata normal form. 0/1731 useless extension candidates. Maximal degree in co-relation 3385. Up to 2214 conditions per place. [2023-08-04 09:03:32,611 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 75 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 09:03:32,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 398 flow [2023-08-04 09:03:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1141 transitions. [2023-08-04 09:03:32,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544006371963361 [2023-08-04 09:03:32,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1141 transitions. [2023-08-04 09:03:32,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1141 transitions. [2023-08-04 09:03:32,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:32,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1141 transitions. [2023-08-04 09:03:32,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.3333333333333) internal successors, (1141), 3 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:32,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:32,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:32,624 INFO L175 Difference]: Start difference. First operand has 55 places, 67 transitions, 208 flow. Second operand 3 states and 1141 transitions. [2023-08-04 09:03:32,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 398 flow [2023-08-04 09:03:32,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:32,629 INFO L231 Difference]: Finished difference. Result has 57 places, 68 transitions, 218 flow [2023-08-04 09:03:32,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=68} [2023-08-04 09:03:32,629 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 09:03:32,630 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 68 transitions, 218 flow [2023-08-04 09:03:32,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:32,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:32,630 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] [2023-08-04 09:03:32,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:32,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:32,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:32,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash -597089102, now seen corresponding path program 1 times [2023-08-04 09:03:32,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:32,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745730389] [2023-08-04 09:03:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:32,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:03:32,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:32,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745730389] [2023-08-04 09:03:32,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745730389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:32,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332487627] [2023-08-04 09:03:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:32,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:32,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:32,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:03:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:33,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:33,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:03:33,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:33,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332487627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:33,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:33,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:03:33,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58285452] [2023-08-04 09:03:33,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:33,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:33,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:33,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:33,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:33,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 837 [2023-08-04 09:03:33,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 367.3333333333333) internal successors, (1102), 3 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:33,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:33,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 837 [2023-08-04 09:03:33,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:33,710 INFO L124 PetriNetUnfolderBase]: 1707/2530 cut-off events. [2023-08-04 09:03:33,710 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-04 09:03:33,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5626 conditions, 2530 events. 1707/2530 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9097 event pairs, 819 based on Foata normal form. 0/1737 useless extension candidates. Maximal degree in co-relation 4883. Up to 2375 conditions per place. [2023-08-04 09:03:33,717 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 67 selfloop transitions, 2 changer transitions 4/77 dead transitions. [2023-08-04 09:03:33,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 382 flow [2023-08-04 09:03:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1136 transitions. [2023-08-04 09:03:33,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524093986459578 [2023-08-04 09:03:33,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1136 transitions. [2023-08-04 09:03:33,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1136 transitions. [2023-08-04 09:03:33,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:33,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1136 transitions. [2023-08-04 09:03:33,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:33,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:33,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 837.0) internal successors, (3348), 4 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) [2023-08-04 09:03:33,732 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 218 flow. Second operand 3 states and 1136 transitions. [2023-08-04 09:03:33,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 382 flow [2023-08-04 09:03:33,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:33,737 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 212 flow [2023-08-04 09:03:33,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2023-08-04 09:03:33,738 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-08-04 09:03:33,738 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 212 flow [2023-08-04 09:03:33,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 367.3333333333333) internal successors, (1102), 3 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:33,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:33,739 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] [2023-08-04 09:03:33,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:33,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:33,946 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:33,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash 572824609, now seen corresponding path program 1 times [2023-08-04 09:03:33,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:33,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314684059] [2023-08-04 09:03:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:33,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:03:34,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:34,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314684059] [2023-08-04 09:03:34,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314684059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:34,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100486357] [2023-08-04 09:03:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:34,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:34,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:34,048 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:34,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:03:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:34,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:03:34,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:03:34,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:03:34,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100486357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:34,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:34,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:03:34,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61275087] [2023-08-04 09:03:34,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:34,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:34,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 837 [2023-08-04 09:03:34,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 363.2) internal successors, (1816), 5 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:34,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:34,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 837 [2023-08-04 09:03:34,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:34,338 INFO L124 PetriNetUnfolderBase]: 9/21 cut-off events. [2023-08-04 09:03:34,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:34,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 21 events. 9/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 2/17 useless extension candidates. Maximal degree in co-relation 45. Up to 9 conditions per place. [2023-08-04 09:03:34,338 INFO L140 encePairwiseOnDemand]: 834/837 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-04 09:03:34,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 17 transitions, 72 flow [2023-08-04 09:03:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:03:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:03:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1434 transitions. [2023-08-04 09:03:34,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283154121863799 [2023-08-04 09:03:34,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1434 transitions. [2023-08-04 09:03:34,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1434 transitions. [2023-08-04 09:03:34,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:34,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1434 transitions. [2023-08-04 09:03:34,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 358.5) internal successors, (1434), 4 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:34,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 837.0) internal successors, (4185), 5 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:34,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 837.0) internal successors, (4185), 5 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:34,365 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 212 flow. Second operand 4 states and 1434 transitions. [2023-08-04 09:03:34,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 17 transitions, 72 flow [2023-08-04 09:03:34,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:34,366 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:03:34,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=837, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 09:03:34,367 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -30 predicate places. [2023-08-04 09:03:34,367 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:03:34,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 363.2) internal successors, (1816), 5 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:34,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:03:34,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:34,578 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,SelfDestructingSolverStorable8 [2023-08-04 09:03:34,578 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:34,580 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:03:34,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:34,901 INFO L124 PetriNetUnfolderBase]: 318/1751 cut-off events. [2023-08-04 09:03:34,901 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:03:34,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1929 conditions, 1751 events. 318/1751 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10618 event pairs, 0 based on Foata normal form. 0/1451 useless extension candidates. Maximal degree in co-relation 1076. Up to 33 conditions per place. [2023-08-04 09:03:34,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:34,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:34,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:34,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:34,928 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:34,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 365 places, 417 transitions, 902 flow [2023-08-04 09:03:35,145 INFO L124 PetriNetUnfolderBase]: 318/1751 cut-off events. [2023-08-04 09:03:35,145 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:03:35,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1929 conditions, 1751 events. 318/1751 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10618 event pairs, 0 based on Foata normal form. 0/1451 useless extension candidates. Maximal degree in co-relation 1076. Up to 33 conditions per place. [2023-08-04 09:03:35,181 INFO L119 LiptonReduction]: Number of co-enabled transitions 17600 [2023-08-04 09:03:46,872 INFO L134 LiptonReduction]: Checked pairs total: 25091 [2023-08-04 09:03:46,872 INFO L136 LiptonReduction]: Total number of compositions: 422 [2023-08-04 09:03:46,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:03:46,877 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52b5ffe0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:46,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:03:46,884 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:46,885 INFO L124 PetriNetUnfolderBase]: 8/39 cut-off events. [2023-08-04 09:03:46,885 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:46,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:46,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:46,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:03:46,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:46,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2010845772, now seen corresponding path program 1 times [2023-08-04 09:03:46,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:46,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386341197] [2023-08-04 09:03:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:46,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:03:46,969 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:03:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:03:47,027 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:03:47,027 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:03:47,027 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:03:47,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:03:47,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:03:47,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:03:47,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:03:47,028 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:03:47,029 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:03:47,029 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:03:47,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:03:47,088 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:03:47,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 425 places, 505 transitions, 1154 flow [2023-08-04 09:03:50,833 INFO L124 PetriNetUnfolderBase]: 5665/20886 cut-off events. [2023-08-04 09:03:50,833 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:03:51,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25271 conditions, 20886 events. 5665/20886 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 217586 event pairs, 81 based on Foata normal form. 0/17742 useless extension candidates. Maximal degree in co-relation 12696. Up to 1024 conditions per place. [2023-08-04 09:03:51,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 425 places, 505 transitions, 1154 flow [2023-08-04 09:03:51,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 425 places, 505 transitions, 1154 flow [2023-08-04 09:03:51,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:51,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 425 places, 505 transitions, 1154 flow [2023-08-04 09:03:51,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 425 places, 505 transitions, 1154 flow [2023-08-04 09:03:51,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 425 places, 505 transitions, 1154 flow [2023-08-04 09:03:54,448 INFO L124 PetriNetUnfolderBase]: 5665/20886 cut-off events. [2023-08-04 09:03:54,449 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:03:54,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25271 conditions, 20886 events. 5665/20886 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 217586 event pairs, 81 based on Foata normal form. 0/17742 useless extension candidates. Maximal degree in co-relation 12696. Up to 1024 conditions per place. [2023-08-04 09:03:55,117 INFO L119 LiptonReduction]: Number of co-enabled transitions 49416 [2023-08-04 09:04:04,667 INFO L134 LiptonReduction]: Checked pairs total: 273145 [2023-08-04 09:04:04,668 INFO L136 LiptonReduction]: Total number of compositions: 422 [2023-08-04 09:04:04,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:04:04,670 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52b5ffe0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:04:04,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:04:04,677 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:04:04,677 INFO L124 PetriNetUnfolderBase]: 20/94 cut-off events. [2023-08-04 09:04:04,677 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:04:04,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:04,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:04,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:04,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -384705388, now seen corresponding path program 1 times [2023-08-04 09:04:04,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:04,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906996798] [2023-08-04 09:04:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:04,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:04:04,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:04,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906996798] [2023-08-04 09:04:04,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906996798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:04,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:04:04,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:04:04,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783429750] [2023-08-04 09:04:04,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:04,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:04,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:04:04,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 407 out of 927 [2023-08-04 09:04:04,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 166 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 411.3333333333333) internal successors, (1234), 3 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:04,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:04,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 407 of 927 [2023-08-04 09:04:04,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand