/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-buffer-mult.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:21:32,683 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:21:32,757 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:21:32,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:21:32,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:21:32,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:21:32,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:21:32,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:21:32,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:21:32,804 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:21:32,805 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:21:32,805 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:21:32,806 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:21:32,807 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:21:32,808 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:21:32,808 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:21:32,808 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:21:32,808 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:21:32,808 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:21:32,809 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:21:32,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:21:32,809 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:21:32,809 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:21:32,810 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:21:32,810 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:21:32,810 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:21:32,810 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:21:32,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:21:32,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:21:32,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:21:32,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:21:32,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:21:32,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:21:32,814 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:21:32,814 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:21:32,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:21:32,814 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:21:32,814 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:21:32,814 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:21:32,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:21:32,815 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:21:32,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:21:33,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:21:33,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:21:33,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:21:33,030 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:21:33,030 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:21:33,031 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-mult.wvr_bound2.c [2023-08-04 09:21:34,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:21:34,376 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:21:34,377 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-mult.wvr_bound2.c [2023-08-04 09:21:34,384 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3748e775/262b8348730f400cac09e6e00fd4a26d/FLAG07a819f8e [2023-08-04 09:21:34,397 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3748e775/262b8348730f400cac09e6e00fd4a26d [2023-08-04 09:21:34,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:21:34,399 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:21:34,400 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:21:34,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:21:34,402 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:21:34,403 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d70abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34, skipping insertion in model container [2023-08-04 09:21:34,404 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,422 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:21:34,532 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-buffer-mult.wvr_bound2.c[4542,4555] [2023-08-04 09:21:34,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:21:34,551 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:21:34,582 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-buffer-mult.wvr_bound2.c[4542,4555] [2023-08-04 09:21:34,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:21:34,591 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:21:34,592 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:21:34,597 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:21:34,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34 WrapperNode [2023-08-04 09:21:34,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:21:34,598 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:21:34,598 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:21:34,598 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:21:34,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,609 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,651 INFO L138 Inliner]: procedures = 27, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 379 [2023-08-04 09:21:34,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:21:34,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:21:34,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:21:34,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:21:34,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,675 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,683 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,701 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,703 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,705 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:21:34,706 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:21:34,706 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:21:34,706 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:21:34,707 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (1/1) ... [2023-08-04 09:21:34,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:21:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:34,738 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 09:21:34,746 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 09:21:34,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:21:34,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:21:34,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:21:34,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:21:34,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:21:34,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:21:34,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:21:34,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:21:34,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:21:34,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:21:34,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:21:34,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:21:34,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:21:34,772 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 09:21:34,857 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:21:34,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:21:35,166 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:21:35,343 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:21:35,343 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-08-04 09:21:35,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:21:35 BoogieIcfgContainer [2023-08-04 09:21:35,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:21:35,349 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:21:35,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:21:35,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:21:35,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:21:34" (1/3) ... [2023-08-04 09:21:35,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cb0b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:21:35, skipping insertion in model container [2023-08-04 09:21:35,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:21:34" (2/3) ... [2023-08-04 09:21:35,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cb0b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:21:35, skipping insertion in model container [2023-08-04 09:21:35,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:21:35" (3/3) ... [2023-08-04 09:21:35,355 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-buffer-mult.wvr_bound2.c [2023-08-04 09:21:35,361 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:21:35,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:21:35,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:21:35,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:21:35,465 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:21:35,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:35,778 INFO L124 PetriNetUnfolderBase]: 277/1559 cut-off events. [2023-08-04 09:21:35,778 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:21:35,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1559 events. 277/1559 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10020 event pairs, 0 based on Foata normal form. 0/1300 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 09:21:35,793 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:35,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:35,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:21:35,828 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:35,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:35,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:36,014 INFO L124 PetriNetUnfolderBase]: 277/1559 cut-off events. [2023-08-04 09:21:36,014 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:21:36,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1559 events. 277/1559 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10020 event pairs, 0 based on Foata normal form. 0/1300 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 09:21:36,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 7790 [2023-08-04 09:21:42,884 INFO L134 LiptonReduction]: Checked pairs total: 23651 [2023-08-04 09:21:42,884 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-04 09:21:42,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:21:42,912 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;@62e52ecb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:21:42,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:21:42,924 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:21:42,925 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-08-04 09:21:42,925 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:21:42,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:42,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:42,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:42,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash -98517590, now seen corresponding path program 1 times [2023-08-04 09:21:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:42,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338594744] [2023-08-04 09:21:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:43,173 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 09:21:43,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:43,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338594744] [2023-08-04 09:21:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338594744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:43,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:21:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:21:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50364688] [2023-08-04 09:21:43,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:43,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:21:43,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 545 [2023-08-04 09:21:43,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 74 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 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 09:21:43,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:43,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 545 [2023-08-04 09:21:43,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:45,187 INFO L124 PetriNetUnfolderBase]: 18264/25419 cut-off events. [2023-08-04 09:21:45,188 INFO L125 PetriNetUnfolderBase]: For 1653/1653 co-relation queries the response was YES. [2023-08-04 09:21:45,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51305 conditions, 25419 events. 18264/25419 cut-off events. For 1653/1653 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 158186 event pairs, 9825 based on Foata normal form. 0/16032 useless extension candidates. Maximal degree in co-relation 43245. Up to 23970 conditions per place. [2023-08-04 09:21:45,312 INFO L140 encePairwiseOnDemand]: 541/545 looper letters, 60 selfloop transitions, 2 changer transitions 3/77 dead transitions. [2023-08-04 09:21:45,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 348 flow [2023-08-04 09:21:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-04 09:21:45,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782874617737003 [2023-08-04 09:21:45,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-04 09:21:45,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-04 09:21:45,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:45,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-04 09:21:45,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 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 09:21:45,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:45,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:45,335 INFO L175 Difference]: Start difference. First operand has 61 places, 74 transitions, 216 flow. Second operand 3 states and 782 transitions. [2023-08-04 09:21:45,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 348 flow [2023-08-04 09:21:45,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:21:45,346 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 214 flow [2023-08-04 09:21:45,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2023-08-04 09:21:45,349 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:21:45,349 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 214 flow [2023-08-04 09:21:45,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 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 09:21:45,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:45,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:45,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:21:45,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:45,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:45,351 INFO L85 PathProgramCache]: Analyzing trace with hash 841294251, now seen corresponding path program 1 times [2023-08-04 09:21:45,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382917748] [2023-08-04 09:21:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:45,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:45,420 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 09:21:45,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:45,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382917748] [2023-08-04 09:21:45,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382917748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:45,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749167911] [2023-08-04 09:21:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:45,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:45,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:45,434 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 09:21:45,478 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 09:21:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:45,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:45,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:45,538 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 09:21:45,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:45,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749167911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:45,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:45,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:45,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429319714] [2023-08-04 09:21:45,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:45,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:45,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:45,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 545 [2023-08-04 09:21:45,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 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 09:21:45,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:45,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 545 [2023-08-04 09:21:45,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:47,350 INFO L124 PetriNetUnfolderBase]: 17757/24677 cut-off events. [2023-08-04 09:21:47,351 INFO L125 PetriNetUnfolderBase]: For 1448/1448 co-relation queries the response was YES. [2023-08-04 09:21:47,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49794 conditions, 24677 events. 17757/24677 cut-off events. For 1448/1448 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 153109 event pairs, 9617 based on Foata normal form. 0/15592 useless extension candidates. Maximal degree in co-relation 41737. Up to 23200 conditions per place. [2023-08-04 09:21:47,468 INFO L140 encePairwiseOnDemand]: 542/545 looper letters, 63 selfloop transitions, 2 changer transitions 1/78 dead transitions. [2023-08-04 09:21:47,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 360 flow [2023-08-04 09:21:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:47,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 784 transitions. [2023-08-04 09:21:47,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4795107033639144 [2023-08-04 09:21:47,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 784 transitions. [2023-08-04 09:21:47,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 784 transitions. [2023-08-04 09:21:47,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:47,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 784 transitions. [2023-08-04 09:21:47,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 09:21:47,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:47,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:47,482 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 214 flow. Second operand 3 states and 784 transitions. [2023-08-04 09:21:47,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 360 flow [2023-08-04 09:21:47,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 346 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:21:47,490 INFO L231 Difference]: Finished difference. Result has 60 places, 71 transitions, 208 flow [2023-08-04 09:21:47,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=60, PETRI_TRANSITIONS=71} [2023-08-04 09:21:47,491 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2023-08-04 09:21:47,492 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 71 transitions, 208 flow [2023-08-04 09:21:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 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 09:21:47,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:47,492 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 09:21:47,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:21:47,700 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 09:21:47,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:47,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash -612144427, now seen corresponding path program 1 times [2023-08-04 09:21:47,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:47,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426303491] [2023-08-04 09:21:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:47,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:47,808 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 09:21:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426303491] [2023-08-04 09:21:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426303491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737215261] [2023-08-04 09:21:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:47,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:47,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:47,835 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 09:21:47,849 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 09:21:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:47,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:47,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:47,943 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 09:21:47,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:47,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737215261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:47,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:47,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184872527] [2023-08-04 09:21:47,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:47,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:47,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:47,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:47,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 545 [2023-08-04 09:21:47,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 71 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 09:21:47,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:47,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 545 [2023-08-04 09:21:47,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:50,036 INFO L124 PetriNetUnfolderBase]: 17173/23853 cut-off events. [2023-08-04 09:21:50,037 INFO L125 PetriNetUnfolderBase]: For 821/821 co-relation queries the response was YES. [2023-08-04 09:21:50,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48182 conditions, 23853 events. 17173/23853 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 147814 event pairs, 8836 based on Foata normal form. 0/15041 useless extension candidates. Maximal degree in co-relation 21118. Up to 22225 conditions per place. [2023-08-04 09:21:50,166 INFO L140 encePairwiseOnDemand]: 542/545 looper letters, 66 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 09:21:50,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 362 flow [2023-08-04 09:21:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 786 transitions. [2023-08-04 09:21:50,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48073394495412847 [2023-08-04 09:21:50,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 786 transitions. [2023-08-04 09:21:50,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 786 transitions. [2023-08-04 09:21:50,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:50,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 786 transitions. [2023-08-04 09:21:50,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 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 09:21:50,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:50,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:50,176 INFO L175 Difference]: Start difference. First operand has 60 places, 71 transitions, 208 flow. Second operand 3 states and 786 transitions. [2023-08-04 09:21:50,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 362 flow [2023-08-04 09:21:50,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:21:50,180 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 212 flow [2023-08-04 09:21:50,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2023-08-04 09:21:50,181 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-08-04 09:21:50,181 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 212 flow [2023-08-04 09:21:50,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 09:21:50,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:50,182 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] [2023-08-04 09:21:50,187 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 09:21:50,387 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 09:21:50,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:50,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1759458458, now seen corresponding path program 1 times [2023-08-04 09:21:50,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:50,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360950860] [2023-08-04 09:21:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:50,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:50,508 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 09:21:50,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:50,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360950860] [2023-08-04 09:21:50,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360950860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:50,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14866389] [2023-08-04 09:21:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:50,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:50,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:50,511 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 09:21:50,555 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 09:21:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:50,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:50,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:50,645 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 09:21:50,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:50,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14866389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:50,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:50,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:50,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934045372] [2023-08-04 09:21:50,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:50,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:50,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:50,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 545 [2023-08-04 09:21:50,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:50,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:50,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 545 [2023-08-04 09:21:50,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:52,654 INFO L124 PetriNetUnfolderBase]: 19533/26261 cut-off events. [2023-08-04 09:21:52,655 INFO L125 PetriNetUnfolderBase]: For 871/871 co-relation queries the response was YES. [2023-08-04 09:21:52,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52999 conditions, 26261 events. 19533/26261 cut-off events. For 871/871 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 146227 event pairs, 11024 based on Foata normal form. 0/16277 useless extension candidates. Maximal degree in co-relation 23008. Up to 23865 conditions per place. [2023-08-04 09:21:52,761 INFO L140 encePairwiseOnDemand]: 542/545 looper letters, 68 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 09:21:52,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 374 flow [2023-08-04 09:21:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 788 transitions. [2023-08-04 09:21:52,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819571865443425 [2023-08-04 09:21:52,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 788 transitions. [2023-08-04 09:21:52,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 788 transitions. [2023-08-04 09:21:52,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:52,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 788 transitions. [2023-08-04 09:21:52,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:52,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:52,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:52,781 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 212 flow. Second operand 3 states and 788 transitions. [2023-08-04 09:21:52,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 374 flow [2023-08-04 09:21:52,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:21:52,797 INFO L231 Difference]: Finished difference. Result has 62 places, 71 transitions, 216 flow [2023-08-04 09:21:52,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2023-08-04 09:21:52,797 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2023-08-04 09:21:52,797 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 216 flow [2023-08-04 09:21:52,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:52,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:52,798 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 09:21:52,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:21:53,002 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 09:21:53,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:53,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash -764634998, now seen corresponding path program 1 times [2023-08-04 09:21:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:53,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92123483] [2023-08-04 09:21:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:53,095 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 09:21:53,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:53,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92123483] [2023-08-04 09:21:53,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92123483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:53,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431950930] [2023-08-04 09:21:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:53,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:53,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:53,102 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 09:21:53,104 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 09:21:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:53,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:53,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:53,217 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 09:21:53,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:53,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431950930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:53,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:53,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:53,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141615560] [2023-08-04 09:21:53,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:53,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:53,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:53,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 545 [2023-08-04 09:21:53,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 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 09:21:53,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:53,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 545 [2023-08-04 09:21:53,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:54,558 INFO L124 PetriNetUnfolderBase]: 11287/15951 cut-off events. [2023-08-04 09:21:54,558 INFO L125 PetriNetUnfolderBase]: For 671/671 co-relation queries the response was YES. [2023-08-04 09:21:54,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32940 conditions, 15951 events. 11287/15951 cut-off events. For 671/671 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 93118 event pairs, 6448 based on Foata normal form. 0/10271 useless extension candidates. Maximal degree in co-relation 13750. Up to 13057 conditions per place. [2023-08-04 09:21:54,627 INFO L140 encePairwiseOnDemand]: 542/545 looper letters, 73 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 09:21:54,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 408 flow [2023-08-04 09:21:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-08-04 09:21:54,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850152905198777 [2023-08-04 09:21:54,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-08-04 09:21:54,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-08-04 09:21:54,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:54,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-08-04 09:21:54,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:54,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:54,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:54,637 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 216 flow. Second operand 3 states and 793 transitions. [2023-08-04 09:21:54,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 408 flow [2023-08-04 09:21:54,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:21:54,641 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 224 flow [2023-08-04 09:21:54,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-08-04 09:21:54,642 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:21:54,642 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 224 flow [2023-08-04 09:21:54,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 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 09:21:54,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:54,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:54,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 09:21:54,847 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 09:21:54,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:54,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1236787508, now seen corresponding path program 1 times [2023-08-04 09:21:54,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:54,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074453261] [2023-08-04 09:21:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:54,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:54,928 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 09:21:54,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:54,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074453261] [2023-08-04 09:21:54,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074453261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:54,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918004835] [2023-08-04 09:21:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:54,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:54,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:54,946 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 09:21:54,985 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 09:21:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:55,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:55,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:55,090 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 09:21:55,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:55,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918004835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:55,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:55,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:55,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511414256] [2023-08-04 09:21:55,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:55,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:55,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:55,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 545 [2023-08-04 09:21:55,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 09:21:55,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:55,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 545 [2023-08-04 09:21:55,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:55,934 INFO L124 PetriNetUnfolderBase]: 8545/12283 cut-off events. [2023-08-04 09:21:55,934 INFO L125 PetriNetUnfolderBase]: For 791/791 co-relation queries the response was YES. [2023-08-04 09:21:55,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26122 conditions, 12283 events. 8545/12283 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 70162 event pairs, 4892 based on Foata normal form. 0/8405 useless extension candidates. Maximal degree in co-relation 10884. Up to 9412 conditions per place. [2023-08-04 09:21:55,986 INFO L140 encePairwiseOnDemand]: 542/545 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 09:21:55,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 418 flow [2023-08-04 09:21:55,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-08-04 09:21:55,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850152905198777 [2023-08-04 09:21:55,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-08-04 09:21:55,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-08-04 09:21:55,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:55,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-08-04 09:21:55,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:55,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:55,992 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:55,992 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 224 flow. Second operand 3 states and 793 transitions. [2023-08-04 09:21:55,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 418 flow [2023-08-04 09:21:56,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:21:56,003 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 234 flow [2023-08-04 09:21:56,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 09:21:56,004 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 09:21:56,004 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 234 flow [2023-08-04 09:21:56,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 09:21:56,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:56,004 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 09:21:56,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:21:56,208 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 09:21:56,209 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:56,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1161026207, now seen corresponding path program 1 times [2023-08-04 09:21:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:56,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338667154] [2023-08-04 09:21:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:56,252 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 09:21:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:56,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338667154] [2023-08-04 09:21:56,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338667154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:56,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969282179] [2023-08-04 09:21:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:56,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:56,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:56,269 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 09:21:56,270 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 09:21:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:56,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:56,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:21:56,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:56,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969282179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:56,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:56,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:56,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346115112] [2023-08-04 09:21:56,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:56,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:56,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:56,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 545 [2023-08-04 09:21:56,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 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 09:21:56,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:56,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 545 [2023-08-04 09:21:56,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:57,543 INFO L124 PetriNetUnfolderBase]: 8074/11597 cut-off events. [2023-08-04 09:21:57,543 INFO L125 PetriNetUnfolderBase]: For 986/986 co-relation queries the response was YES. [2023-08-04 09:21:57,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25093 conditions, 11597 events. 8074/11597 cut-off events. For 986/986 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 65432 event pairs, 5425 based on Foata normal form. 0/8133 useless extension candidates. Maximal degree in co-relation 17013. Up to 10345 conditions per place. [2023-08-04 09:21:57,602 INFO L140 encePairwiseOnDemand]: 542/545 looper letters, 75 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 09:21:57,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 430 flow [2023-08-04 09:21:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-08-04 09:21:57,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850152905198777 [2023-08-04 09:21:57,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-08-04 09:21:57,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-08-04 09:21:57,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:57,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-08-04 09:21:57,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:57,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:57,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:57,611 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 234 flow. Second operand 3 states and 793 transitions. [2023-08-04 09:21:57,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 430 flow [2023-08-04 09:21:57,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:21:57,646 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 244 flow [2023-08-04 09:21:57,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-04 09:21:57,647 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 09:21:57,647 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 244 flow [2023-08-04 09:21:57,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 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 09:21:57,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:57,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:57,653 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 09:21:57,853 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 09:21:57,853 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:57,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1850876395, now seen corresponding path program 1 times [2023-08-04 09:21:57,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:57,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049788355] [2023-08-04 09:21:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:57,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:21:57,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049788355] [2023-08-04 09:21:57,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049788355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:57,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996258612] [2023-08-04 09:21:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:57,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:57,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:57,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:21:57,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:21:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:58,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:58,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:21:58,063 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:58,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996258612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:58,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:58,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:21:58,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475057104] [2023-08-04 09:21:58,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:58,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:58,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:58,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 545 [2023-08-04 09:21:58,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 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 09:21:58,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:58,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 545 [2023-08-04 09:21:58,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:58,974 INFO L124 PetriNetUnfolderBase]: 8059/11570 cut-off events. [2023-08-04 09:21:58,974 INFO L125 PetriNetUnfolderBase]: For 834/834 co-relation queries the response was YES. [2023-08-04 09:21:58,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25086 conditions, 11570 events. 8059/11570 cut-off events. For 834/834 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 65267 event pairs, 5634 based on Foata normal form. 0/8141 useless extension candidates. Maximal degree in co-relation 23419. Up to 10808 conditions per place. [2023-08-04 09:21:59,016 INFO L140 encePairwiseOnDemand]: 542/545 looper letters, 69 selfloop transitions, 2 changer transitions 2/85 dead transitions. [2023-08-04 09:21:59,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 412 flow [2023-08-04 09:21:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 788 transitions. [2023-08-04 09:21:59,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819571865443425 [2023-08-04 09:21:59,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 788 transitions. [2023-08-04 09:21:59,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 788 transitions. [2023-08-04 09:21:59,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:59,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 788 transitions. [2023-08-04 09:21:59,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:59,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:59,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 545.0) internal successors, (2180), 4 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 09:21:59,022 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 244 flow. Second operand 3 states and 788 transitions. [2023-08-04 09:21:59,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 412 flow [2023-08-04 09:21:59,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:21:59,051 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 246 flow [2023-08-04 09:21:59,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2023-08-04 09:21:59,051 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2023-08-04 09:21:59,051 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 246 flow [2023-08-04 09:21:59,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 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 09:21:59,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:59,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:59,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:21:59,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:59,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:59,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash -555455493, now seen corresponding path program 1 times [2023-08-04 09:21:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:59,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639619160] [2023-08-04 09:21:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:59,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:21:59,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639619160] [2023-08-04 09:21:59,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639619160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145114817] [2023-08-04 09:21:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:59,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:59,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:21:59,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:21:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:59,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:21:59,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:21:59,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:21:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:21:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145114817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:21:59,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:21:59,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:21:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931214747] [2023-08-04 09:21:59,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:21:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:21:59,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:21:59,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:59,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 545 [2023-08-04 09:21:59,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:59,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:59,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 545 [2023-08-04 09:21:59,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:59,570 INFO L124 PetriNetUnfolderBase]: 12/28 cut-off events. [2023-08-04 09:21:59,570 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:21:59,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 28 events. 12/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 1 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 59. Up to 17 conditions per place. [2023-08-04 09:21:59,570 INFO L140 encePairwiseOnDemand]: 542/545 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 09:21:59,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 16 transitions, 66 flow [2023-08-04 09:21:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:21:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:21:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 968 transitions. [2023-08-04 09:21:59,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44403669724770645 [2023-08-04 09:21:59,573 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 968 transitions. [2023-08-04 09:21:59,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 968 transitions. [2023-08-04 09:21:59,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:59,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 968 transitions. [2023-08-04 09:21:59,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 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 09:21:59,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 545.0) internal successors, (2725), 5 states have internal predecessors, (2725), 0 states have call successors, (0), 0 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 09:21:59,579 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 545.0) internal successors, (2725), 5 states have internal predecessors, (2725), 0 states have call successors, (0), 0 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 09:21:59,579 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 246 flow. Second operand 4 states and 968 transitions. [2023-08-04 09:21:59,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 16 transitions, 66 flow [2023-08-04 09:21:59,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 16 transitions, 64 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:21:59,580 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:21:59,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=545, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=22, 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=25, PETRI_TRANSITIONS=0} [2023-08-04 09:21:59,580 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -36 predicate places. [2023-08-04 09:21:59,581 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:21:59,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:59,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:21:59,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 09:21:59,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-04 09:21:59,789 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:59,791 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:21:59,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:59,939 INFO L124 PetriNetUnfolderBase]: 277/1559 cut-off events. [2023-08-04 09:21:59,939 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:21:59,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1559 events. 277/1559 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10020 event pairs, 0 based on Foata normal form. 0/1300 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 09:21:59,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:59,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:59,950 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:21:59,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:59,950 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 290 transitions, 648 flow [2023-08-04 09:21:59,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 290 transitions, 648 flow [2023-08-04 09:22:00,114 INFO L124 PetriNetUnfolderBase]: 277/1559 cut-off events. [2023-08-04 09:22:00,114 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:22:00,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1559 events. 277/1559 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10020 event pairs, 0 based on Foata normal form. 0/1300 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 09:22:00,137 INFO L119 LiptonReduction]: Number of co-enabled transitions 7790 [2023-08-04 09:22:07,040 INFO L134 LiptonReduction]: Checked pairs total: 23651 [2023-08-04 09:22:07,041 INFO L136 LiptonReduction]: Total number of compositions: 260 [2023-08-04 09:22:07,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:22:07,042 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;@62e52ecb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:22:07,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:22:07,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:22:07,047 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2023-08-04 09:22:07,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:22:07,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:07,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:07,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:22:07,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2061438398, now seen corresponding path program 1 times [2023-08-04 09:22:07,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:07,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385357784] [2023-08-04 09:22:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:07,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:22:07,100 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:22:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:22:07,167 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:22:07,167 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:22:07,167 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:22:07,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:22:07,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:22:07,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:22:07,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:22:07,168 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:22:07,169 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:22:07,169 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:22:07,169 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:22:07,209 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:22:07,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 344 transitions, 832 flow [2023-08-04 09:22:09,470 INFO L124 PetriNetUnfolderBase]: 5490/20297 cut-off events. [2023-08-04 09:22:09,470 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:22:09,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24682 conditions, 20297 events. 5490/20297 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 214071 event pairs, 97 based on Foata normal form. 0/17328 useless extension candidates. Maximal degree in co-relation 12269. Up to 1024 conditions per place. [2023-08-04 09:22:09,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 344 transitions, 832 flow [2023-08-04 09:22:09,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 344 transitions, 832 flow [2023-08-04 09:22:09,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:22:09,832 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 344 transitions, 832 flow [2023-08-04 09:22:09,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 344 transitions, 832 flow [2023-08-04 09:22:09,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 344 transitions, 832 flow [2023-08-04 09:22:12,018 INFO L124 PetriNetUnfolderBase]: 5490/20297 cut-off events. [2023-08-04 09:22:12,019 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:22:12,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24682 conditions, 20297 events. 5490/20297 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 214071 event pairs, 97 based on Foata normal form. 0/17328 useless extension candidates. Maximal degree in co-relation 12269. Up to 1024 conditions per place. [2023-08-04 09:22:12,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 20348 [2023-08-04 09:22:20,089 INFO L134 LiptonReduction]: Checked pairs total: 89904 [2023-08-04 09:22:20,089 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-04 09:22:20,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:22:20,107 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;@62e52ecb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:22:20,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:22:20,112 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:22:20,112 INFO L124 PetriNetUnfolderBase]: 6/67 cut-off events. [2023-08-04 09:22:20,112 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:22:20,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:20,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:20,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:20,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:20,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1335994044, now seen corresponding path program 1 times [2023-08-04 09:22:20,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:20,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274338566] [2023-08-04 09:22:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:20,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:20,152 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 09:22:20,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:20,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274338566] [2023-08-04 09:22:20,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274338566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:20,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:22:20,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:22:20,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890943775] [2023-08-04 09:22:20,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:20,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:22:20,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 610 [2023-08-04 09:22:20,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 118 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 09:22:20,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:20,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 610 [2023-08-04 09:22:20,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand