/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-more-mts.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:28:28,557 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:28:28,630 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:28:28,632 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:28:28,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:28:28,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:28:28,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:28:28,651 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:28:28,652 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:28:28,652 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:28:28,655 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:28:28,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:28:28,656 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:28:28,659 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:28:28,659 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:28:28,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:28:28,660 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:28:28,661 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:28:28,661 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:28:28,661 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:28:28,661 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:28:28,662 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:28:28,662 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:28:28,662 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:28:28,663 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:28:28,664 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:28:28,664 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:28:28,664 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:28:28,664 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:28:28,665 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:28:28,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:28:28,666 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:28:28,666 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:28:28,666 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:28:28,666 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:28:28,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:28:28,667 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:28:28,667 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:28:28,667 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:28:28,667 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:28:28,667 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:28:28,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:28:28,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:28:28,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:28:28,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:28:28,916 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:28:28,916 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:28:28,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-mts.wvr_bound2.c [2023-08-04 09:28:30,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:28:30,310 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:28:30,311 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-mts.wvr_bound2.c [2023-08-04 09:28:30,318 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d27dd305/42e8b1ec48bc4d3c9644925d4bd2c9e5/FLAGb92e01cb3 [2023-08-04 09:28:30,335 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d27dd305/42e8b1ec48bc4d3c9644925d4bd2c9e5 [2023-08-04 09:28:30,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:28:30,338 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:28:30,339 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:28:30,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:28:30,347 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:28:30,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,348 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@105df2c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30, skipping insertion in model container [2023-08-04 09:28:30,349 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,370 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:28:30,509 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-more-mts.wvr_bound2.c[2776,2789] [2023-08-04 09:28:30,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:28:30,523 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:28:30,545 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-more-mts.wvr_bound2.c[2776,2789] [2023-08-04 09:28:30,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:28:30,557 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:28:30,557 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:28:30,562 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:28:30,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30 WrapperNode [2023-08-04 09:28:30,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:28:30,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:28:30,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:28:30,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:28:30,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,601 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 276 [2023-08-04 09:28:30,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:28:30,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:28:30,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:28:30,602 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:28:30,609 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,623 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,637 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,642 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:28:30,643 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:28:30,650 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:28:30,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:28:30,651 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (1/1) ... [2023-08-04 09:28:30,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:28:30,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:30,681 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 09:28:30,682 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 09:28:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:28:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:28:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:28:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:28:30,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:28:30,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:28:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:28:30,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:28:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:28:30,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:28:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:28:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:28:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:28:30,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:28:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:28:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:28:30,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:28:30,709 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 09:28:30,814 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:28:30,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:28:31,179 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:28:31,297 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:28:31,297 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 09:28:31,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:28:31 BoogieIcfgContainer [2023-08-04 09:28:31,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:28:31,305 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:28:31,305 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:28:31,309 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:28:31,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:28:30" (1/3) ... [2023-08-04 09:28:31,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60edf6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:28:31, skipping insertion in model container [2023-08-04 09:28:31,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:30" (2/3) ... [2023-08-04 09:28:31,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60edf6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:28:31, skipping insertion in model container [2023-08-04 09:28:31,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:28:31" (3/3) ... [2023-08-04 09:28:31,314 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-mts.wvr_bound2.c [2023-08-04 09:28:31,322 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:28:31,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:28:31,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:28:31,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:28:31,433 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:28:31,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:31,709 INFO L124 PetriNetUnfolderBase]: 110/752 cut-off events. [2023-08-04 09:28:31,709 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:28:31,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 752 events. 110/752 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4028 event pairs, 0 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 465. Up to 16 conditions per place. [2023-08-04 09:28:31,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:31,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:31,737 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:28:31,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:31,753 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:31,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:31,853 INFO L124 PetriNetUnfolderBase]: 110/752 cut-off events. [2023-08-04 09:28:31,853 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:28:31,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 752 events. 110/752 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4028 event pairs, 0 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 465. Up to 16 conditions per place. [2023-08-04 09:28:31,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 19500 [2023-08-04 09:28:38,409 INFO L134 LiptonReduction]: Checked pairs total: 27793 [2023-08-04 09:28:38,409 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-08-04 09:28:38,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:28:38,427 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;@5d43140b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:28:38,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:28:38,433 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:28:38,433 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2023-08-04 09:28:38,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:28:38,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:38,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:38,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:38,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash -817693452, now seen corresponding path program 1 times [2023-08-04 09:28:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421979784] [2023-08-04 09:28:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:38,713 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 09:28:38,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:38,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421979784] [2023-08-04 09:28:38,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421979784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:38,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:28:38,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:28:38,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132970875] [2023-08-04 09:28:38,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:38,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:28:38,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 500 [2023-08-04 09:28:38,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 55 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 09:28:38,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:38,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 500 [2023-08-04 09:28:38,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:39,533 INFO L124 PetriNetUnfolderBase]: 5360/7274 cut-off events. [2023-08-04 09:28:39,534 INFO L125 PetriNetUnfolderBase]: For 371/371 co-relation queries the response was YES. [2023-08-04 09:28:39,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14644 conditions, 7274 events. 5360/7274 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35008 event pairs, 1959 based on Foata normal form. 0/4349 useless extension candidates. Maximal degree in co-relation 12769. Up to 6975 conditions per place. [2023-08-04 09:28:39,576 INFO L140 encePairwiseOnDemand]: 496/500 looper letters, 48 selfloop transitions, 2 changer transitions 4/60 dead transitions. [2023-08-04 09:28:39,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 264 flow [2023-08-04 09:28:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2023-08-04 09:28:39,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713333333333333 [2023-08-04 09:28:39,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2023-08-04 09:28:39,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2023-08-04 09:28:39,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:39,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2023-08-04 09:28:39,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 09:28:39,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:39,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:39,608 INFO L175 Difference]: Start difference. First operand has 47 places, 55 transitions, 152 flow. Second operand 3 states and 707 transitions. [2023-08-04 09:28:39,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 264 flow [2023-08-04 09:28:39,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:28:39,614 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 146 flow [2023-08-04 09:28:39,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2023-08-04 09:28:39,619 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 09:28:39,619 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 146 flow [2023-08-04 09:28:39,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 09:28:39,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:39,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:39,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:28:39,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:39,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:39,621 INFO L85 PathProgramCache]: Analyzing trace with hash 230924831, now seen corresponding path program 1 times [2023-08-04 09:28:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:39,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385591475] [2023-08-04 09:28:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:39,688 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 09:28:39,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:39,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385591475] [2023-08-04 09:28:39,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385591475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:39,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835646342] [2023-08-04 09:28:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:39,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:39,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:39,697 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 09:28:39,706 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 09:28:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:39,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:39,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:39,814 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 09:28:39,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:39,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835646342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:39,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:39,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:39,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585693672] [2023-08-04 09:28:39,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:39,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:39,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:39,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 500 [2023-08-04 09:28:39,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 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 09:28:39,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:39,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 500 [2023-08-04 09:28:39,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:40,553 INFO L124 PetriNetUnfolderBase]: 5181/6981 cut-off events. [2023-08-04 09:28:40,554 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-08-04 09:28:40,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14059 conditions, 6981 events. 5181/6981 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 33158 event pairs, 1926 based on Foata normal form. 0/4163 useless extension candidates. Maximal degree in co-relation 12189. Up to 6662 conditions per place. [2023-08-04 09:28:40,593 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 53 selfloop transitions, 2 changer transitions 1/62 dead transitions. [2023-08-04 09:28:40,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 280 flow [2023-08-04 09:28:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2023-08-04 09:28:40,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474 [2023-08-04 09:28:40,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2023-08-04 09:28:40,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2023-08-04 09:28:40,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:40,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2023-08-04 09:28:40,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 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 09:28:40,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:40,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:40,607 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 146 flow. Second operand 3 states and 711 transitions. [2023-08-04 09:28:40,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 280 flow [2023-08-04 09:28:40,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 264 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:28:40,613 INFO L231 Difference]: Finished difference. Result has 44 places, 51 transitions, 138 flow [2023-08-04 09:28:40,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=51} [2023-08-04 09:28:40,614 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-08-04 09:28:40,614 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 51 transitions, 138 flow [2023-08-04 09:28:40,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 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 09:28:40,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:40,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:40,625 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 09:28:40,822 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 09:28:40,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:40,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:40,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1315856342, now seen corresponding path program 1 times [2023-08-04 09:28:40,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:40,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093093015] [2023-08-04 09:28:40,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:40,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:40,887 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 09:28:40,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093093015] [2023-08-04 09:28:40,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093093015] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681651945] [2023-08-04 09:28:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:40,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:40,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:40,893 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 09:28:40,901 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 09:28:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:41,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:41,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:41,010 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 09:28:41,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:41,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681651945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:41,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:41,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:41,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653538502] [2023-08-04 09:28:41,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:41,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:41,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:41,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 500 [2023-08-04 09:28:41,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 51 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 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 09:28:41,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:41,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 500 [2023-08-04 09:28:41,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:41,640 INFO L124 PetriNetUnfolderBase]: 5156/6956 cut-off events. [2023-08-04 09:28:41,640 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 09:28:41,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14044 conditions, 6956 events. 5156/6956 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32909 event pairs, 2231 based on Foata normal form. 0/4183 useless extension candidates. Maximal degree in co-relation 7674. Up to 6314 conditions per place. [2023-08-04 09:28:41,685 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 55 selfloop transitions, 2 changer transitions 1/64 dead transitions. [2023-08-04 09:28:41,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 64 transitions, 280 flow [2023-08-04 09:28:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-08-04 09:28:41,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47533333333333333 [2023-08-04 09:28:41,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-08-04 09:28:41,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-08-04 09:28:41,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:41,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-08-04 09:28:41,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 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 09:28:41,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:41,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:41,695 INFO L175 Difference]: Start difference. First operand has 44 places, 51 transitions, 138 flow. Second operand 3 states and 713 transitions. [2023-08-04 09:28:41,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 64 transitions, 280 flow [2023-08-04 09:28:41,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:28:41,698 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 142 flow [2023-08-04 09:28:41,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2023-08-04 09:28:41,699 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-08-04 09:28:41,699 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 142 flow [2023-08-04 09:28:41,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 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 09:28:41,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:41,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:41,711 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 09:28:41,906 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 09:28:41,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:41,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1349757848, now seen corresponding path program 1 times [2023-08-04 09:28:41,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:41,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864964531] [2023-08-04 09:28:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:41,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:41,995 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 09:28:41,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:41,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864964531] [2023-08-04 09:28:41,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864964531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:41,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119929263] [2023-08-04 09:28:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:41,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:41,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:41,997 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 09:28:42,000 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 09:28:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:42,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:42,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:42,094 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 09:28:42,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:42,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119929263] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:42,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:42,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:42,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250739801] [2023-08-04 09:28:42,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:42,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:42,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:42,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:42,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 500 [2023-08-04 09:28:42,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 09:28:42,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:42,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 500 [2023-08-04 09:28:42,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:42,542 INFO L124 PetriNetUnfolderBase]: 3192/4397 cut-off events. [2023-08-04 09:28:42,542 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-08-04 09:28:42,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9102 conditions, 4397 events. 3192/4397 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19317 event pairs, 1270 based on Foata normal form. 0/2740 useless extension candidates. Maximal degree in co-relation 4772. Up to 3293 conditions per place. [2023-08-04 09:28:42,559 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 60 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-04 09:28:42,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 306 flow [2023-08-04 09:28:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 717 transitions. [2023-08-04 09:28:42,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478 [2023-08-04 09:28:42,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 717 transitions. [2023-08-04 09:28:42,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 717 transitions. [2023-08-04 09:28:42,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:42,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 717 transitions. [2023-08-04 09:28:42,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 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 09:28:42,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:42,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:42,568 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 142 flow. Second operand 3 states and 717 transitions. [2023-08-04 09:28:42,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 306 flow [2023-08-04 09:28:42,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:28:42,571 INFO L231 Difference]: Finished difference. Result has 46 places, 52 transitions, 150 flow [2023-08-04 09:28:42,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=46, PETRI_TRANSITIONS=52} [2023-08-04 09:28:42,572 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2023-08-04 09:28:42,572 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 52 transitions, 150 flow [2023-08-04 09:28:42,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 09:28:42,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:42,573 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] [2023-08-04 09:28:42,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:28:42,778 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 09:28:42,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:42,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash -728040628, now seen corresponding path program 1 times [2023-08-04 09:28:42,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:42,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843158498] [2023-08-04 09:28:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:42,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:42,870 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 09:28:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:42,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843158498] [2023-08-04 09:28:42,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843158498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:42,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821526571] [2023-08-04 09:28:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:42,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:42,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:42,872 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 09:28:42,875 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 09:28:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:42,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:42,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:42,963 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 09:28:42,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:42,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821526571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:42,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:42,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:42,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793110813] [2023-08-04 09:28:42,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:42,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:42,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:42,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:42,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:42,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 500 [2023-08-04 09:28:42,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 52 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 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 09:28:42,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:42,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 500 [2023-08-04 09:28:42,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:43,308 INFO L124 PetriNetUnfolderBase]: 2717/3761 cut-off events. [2023-08-04 09:28:43,309 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-08-04 09:28:43,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8013 conditions, 3761 events. 2717/3761 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16030 event pairs, 1268 based on Foata normal form. 0/2504 useless extension candidates. Maximal degree in co-relation 4257. Up to 3121 conditions per place. [2023-08-04 09:28:43,325 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 61 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-04 09:28:43,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 316 flow [2023-08-04 09:28:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 717 transitions. [2023-08-04 09:28:43,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478 [2023-08-04 09:28:43,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 717 transitions. [2023-08-04 09:28:43,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 717 transitions. [2023-08-04 09:28:43,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:43,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 717 transitions. [2023-08-04 09:28:43,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 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 09:28:43,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:43,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:43,334 INFO L175 Difference]: Start difference. First operand has 46 places, 52 transitions, 150 flow. Second operand 3 states and 717 transitions. [2023-08-04 09:28:43,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 316 flow [2023-08-04 09:28:43,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:43,341 INFO L231 Difference]: Finished difference. Result has 48 places, 53 transitions, 160 flow [2023-08-04 09:28:43,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=53} [2023-08-04 09:28:43,341 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-08-04 09:28:43,342 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 53 transitions, 160 flow [2023-08-04 09:28:43,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 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 09:28:43,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:43,342 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] [2023-08-04 09:28:43,349 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 09:28:43,548 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 09:28:43,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:43,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:43,549 INFO L85 PathProgramCache]: Analyzing trace with hash 148191903, now seen corresponding path program 1 times [2023-08-04 09:28:43,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:43,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545222874] [2023-08-04 09:28:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:43,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:43,631 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 09:28:43,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:43,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545222874] [2023-08-04 09:28:43,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545222874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:43,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519211885] [2023-08-04 09:28:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:43,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:43,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:43,645 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 09:28:43,667 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 09:28:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:43,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:43,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:43,752 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 09:28:43,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:43,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519211885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:43,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:43,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:28:43,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092291857] [2023-08-04 09:28:43,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:43,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:43,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:43,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 500 [2023-08-04 09:28:43,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 53 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 09:28:43,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:43,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 500 [2023-08-04 09:28:43,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:44,145 INFO L124 PetriNetUnfolderBase]: 2698/3731 cut-off events. [2023-08-04 09:28:44,145 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-08-04 09:28:44,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8011 conditions, 3731 events. 2698/3731 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15838 event pairs, 1437 based on Foata normal form. 0/2509 useless extension candidates. Maximal degree in co-relation 6442. Up to 3549 conditions per place. [2023-08-04 09:28:44,157 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 55 selfloop transitions, 2 changer transitions 3/66 dead transitions. [2023-08-04 09:28:44,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 306 flow [2023-08-04 09:28:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-08-04 09:28:44,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47533333333333333 [2023-08-04 09:28:44,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-08-04 09:28:44,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-08-04 09:28:44,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:44,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-08-04 09:28:44,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 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 09:28:44,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:44,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 500.0) internal successors, (2000), 4 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 09:28:44,166 INFO L175 Difference]: Start difference. First operand has 48 places, 53 transitions, 160 flow. Second operand 3 states and 713 transitions. [2023-08-04 09:28:44,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 306 flow [2023-08-04 09:28:44,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:44,175 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 158 flow [2023-08-04 09:28:44,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-04 09:28:44,176 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-08-04 09:28:44,176 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 158 flow [2023-08-04 09:28:44,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 09:28:44,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:44,177 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 09:28:44,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 09:28:44,382 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 09:28:44,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:44,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:44,383 INFO L85 PathProgramCache]: Analyzing trace with hash -181021484, now seen corresponding path program 1 times [2023-08-04 09:28:44,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:44,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053366126] [2023-08-04 09:28:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:44,461 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 09:28:44,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:44,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053366126] [2023-08-04 09:28:44,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053366126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:44,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677818006] [2023-08-04 09:28:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:44,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:44,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:44,463 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 09:28:44,492 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 09:28:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:44,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:28:44,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:44,638 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 09:28:44,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:28:44,664 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 09:28:44,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677818006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:28:44,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:28:44,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:28:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215850796] [2023-08-04 09:28:44,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:28:44,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:28:44,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:28:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:44,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 500 [2023-08-04 09:28:44,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 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 09:28:44,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:44,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 500 [2023-08-04 09:28:44,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:44,707 INFO L124 PetriNetUnfolderBase]: 16/34 cut-off events. [2023-08-04 09:28:44,707 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:28:44,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 34 events. 16/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 1 based on Foata normal form. 5/31 useless extension candidates. Maximal degree in co-relation 72. Up to 23 conditions per place. [2023-08-04 09:28:44,707 INFO L140 encePairwiseOnDemand]: 497/500 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-04 09:28:44,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 74 flow [2023-08-04 09:28:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:28:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:28:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 886 transitions. [2023-08-04 09:28:44,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.443 [2023-08-04 09:28:44,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 886 transitions. [2023-08-04 09:28:44,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 886 transitions. [2023-08-04 09:28:44,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:44,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 886 transitions. [2023-08-04 09:28:44,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 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 09:28:44,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 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 09:28:44,717 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 500.0) internal successors, (2500), 5 states have internal predecessors, (2500), 0 states have call successors, (0), 0 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 09:28:44,717 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 158 flow. Second operand 4 states and 886 transitions. [2023-08-04 09:28:44,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 74 flow [2023-08-04 09:28:44,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:44,718 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:28:44,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 09:28:44,719 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -25 predicate places. [2023-08-04 09:28:44,720 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:28:44,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 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 09:28:44,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:28:44,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 09:28:44,928 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 09:28:44,928 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:44,930 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:28:44,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:45,008 INFO L124 PetriNetUnfolderBase]: 110/752 cut-off events. [2023-08-04 09:28:45,008 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:28:45,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 752 events. 110/752 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4028 event pairs, 0 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 465. Up to 16 conditions per place. [2023-08-04 09:28:45,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:45,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:45,018 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:28:45,018 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:45,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:45,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 254 transitions, 550 flow [2023-08-04 09:28:45,090 INFO L124 PetriNetUnfolderBase]: 110/752 cut-off events. [2023-08-04 09:28:45,090 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:28:45,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 752 events. 110/752 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4028 event pairs, 0 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 465. Up to 16 conditions per place. [2023-08-04 09:28:45,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 19500 [2023-08-04 09:28:51,061 INFO L134 LiptonReduction]: Checked pairs total: 28675 [2023-08-04 09:28:51,061 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-08-04 09:28:51,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:28:51,064 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;@5d43140b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:28:51,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:28:51,069 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:28:51,069 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2023-08-04 09:28:51,069 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:28:51,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:51,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:28:51,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:28:51,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash -339179550, now seen corresponding path program 1 times [2023-08-04 09:28:51,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:51,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982265141] [2023-08-04 09:28:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:51,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:51,154 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 09:28:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982265141] [2023-08-04 09:28:51,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982265141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:51,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:28:51,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:28:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455191729] [2023-08-04 09:28:51,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:51,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:28:51,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 501 [2023-08-04 09:28:51,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 55 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 09:28:51,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:51,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 501 [2023-08-04 09:28:51,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:51,783 INFO L124 PetriNetUnfolderBase]: 5567/7553 cut-off events. [2023-08-04 09:28:51,784 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 09:28:51,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15221 conditions, 7553 events. 5567/7553 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 36532 event pairs, 2869 based on Foata normal form. 0/4507 useless extension candidates. Maximal degree in co-relation 12821. Up to 7278 conditions per place. [2023-08-04 09:28:51,798 INFO L140 encePairwiseOnDemand]: 497/501 looper letters, 25 selfloop transitions, 2 changer transitions 22/55 dead transitions. [2023-08-04 09:28:51,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2023-08-04 09:28:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-04 09:28:51,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46506986027944114 [2023-08-04 09:28:51,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-04 09:28:51,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-04 09:28:51,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:51,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-04 09:28:51,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 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 09:28:51,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 501.0) internal successors, (2004), 4 states have internal predecessors, (2004), 0 states have call successors, (0), 0 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 09:28:51,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 501.0) internal successors, (2004), 4 states have internal predecessors, (2004), 0 states have call successors, (0), 0 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 09:28:51,806 INFO L175 Difference]: Start difference. First operand has 47 places, 55 transitions, 152 flow. Second operand 3 states and 699 transitions. [2023-08-04 09:28:51,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2023-08-04 09:28:51,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:28:51,808 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 91 flow [2023-08-04 09:28:51,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=501, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-08-04 09:28:51,808 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 09:28:51,808 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 91 flow [2023-08-04 09:28:51,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 09:28:51,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:51,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:51,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:28:51,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:28:51,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:51,809 INFO L85 PathProgramCache]: Analyzing trace with hash -189697819, now seen corresponding path program 1 times [2023-08-04 09:28:51,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:51,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218811504] [2023-08-04 09:28:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:51,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:28:51,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:28:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:28:51,854 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:28:51,854 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:28:51,854 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:28:51,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:28:51,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:28:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:28:51,855 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:28:51,855 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:28:51,856 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:28:51,856 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:28:51,904 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:28:51,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 356 transitions, 802 flow [2023-08-04 09:28:52,505 INFO L124 PetriNetUnfolderBase]: 915/4391 cut-off events. [2023-08-04 09:28:52,505 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:28:52,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5065 conditions, 4391 events. 915/4391 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 35956 event pairs, 11 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 2621. Up to 192 conditions per place. [2023-08-04 09:28:52,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 356 transitions, 802 flow [2023-08-04 09:28:52,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 315 places, 356 transitions, 802 flow [2023-08-04 09:28:52,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:28:52,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 315 places, 356 transitions, 802 flow [2023-08-04 09:28:52,599 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 315 places, 356 transitions, 802 flow [2023-08-04 09:28:52,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 356 transitions, 802 flow [2023-08-04 09:28:53,276 INFO L124 PetriNetUnfolderBase]: 915/4391 cut-off events. [2023-08-04 09:28:53,276 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:28:53,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5065 conditions, 4391 events. 915/4391 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 35956 event pairs, 11 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 2621. Up to 192 conditions per place. [2023-08-04 09:28:53,432 INFO L119 LiptonReduction]: Number of co-enabled transitions 59100 [2023-08-04 09:29:00,801 INFO L134 LiptonReduction]: Checked pairs total: 111045 [2023-08-04 09:29:00,801 INFO L136 LiptonReduction]: Total number of compositions: 333 [2023-08-04 09:29:00,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:29:00,803 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;@5d43140b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:29:00,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:29:00,806 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:29:00,806 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-08-04 09:29:00,806 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:29:00,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:00,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:00,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:00,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 865196075, now seen corresponding path program 1 times [2023-08-04 09:29:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927226746] [2023-08-04 09:29:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:00,846 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 09:29:00,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927226746] [2023-08-04 09:29:00,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927226746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:29:00,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:29:00,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:29:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357953188] [2023-08-04 09:29:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:29:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:29:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:29:00,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 689 [2023-08-04 09:29:00,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 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 09:29:00,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:00,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 689 [2023-08-04 09:29:00,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand