/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-prod-cons3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:37:32,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:37:32,735 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:37:32,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:37:32,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:37:32,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:37:32,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:37:32,770 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:37:32,770 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:37:32,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:37:32,775 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:37:32,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:37:32,776 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:37:32,777 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:37:32,777 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:37:32,777 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:37:32,778 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:37:32,778 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:37:32,778 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:37:32,778 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:37:32,779 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:37:32,779 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:37:32,779 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:37:32,780 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:37:32,780 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:37:32,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:37:32,781 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:37:32,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:37:32,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:37:32,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:37:32,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:37:32,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:37:32,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:37:32,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:37:32,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:37:32,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:37:32,784 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:37:32,784 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:37:32,784 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:37:32,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:37:32,784 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:37:32,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:37:32,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:37:33,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:37:33,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:37:33,029 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:37:33,030 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:37:33,031 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons3.wvr_bound2.c [2023-08-04 09:37:34,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:37:34,464 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:37:34,465 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons3.wvr_bound2.c [2023-08-04 09:37:34,494 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0705100/bcbb221463d349d5a9a5146e131791b6/FLAG4e57d5e7e [2023-08-04 09:37:34,511 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0705100/bcbb221463d349d5a9a5146e131791b6 [2023-08-04 09:37:34,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:37:34,518 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:37:34,521 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:37:34,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:37:34,524 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:37:34,525 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,526 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@417a526c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34, skipping insertion in model container [2023-08-04 09:37:34,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,561 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:37:34,672 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-prod-cons3.wvr_bound2.c[4331,4344] [2023-08-04 09:37:34,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:37:34,680 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:37:34,698 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-prod-cons3.wvr_bound2.c[4331,4344] [2023-08-04 09:37:34,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:37:34,705 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:37:34,705 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:37:34,709 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:37:34,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34 WrapperNode [2023-08-04 09:37:34,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:37:34,710 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:37:34,710 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:37:34,710 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:37:34,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,758 INFO L138 Inliner]: procedures = 26, calls = 73, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 338 [2023-08-04 09:37:34,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:37:34,759 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:37:34,759 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:37:34,759 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:37:34,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,782 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,788 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,792 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:37:34,805 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:37:34,805 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:37:34,805 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:37:34,806 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (1/1) ... [2023-08-04 09:37:34,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:37:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:34,866 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 09:37:34,868 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 09:37:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:37:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:37:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:37:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:37:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:37:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:37:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:37:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:37:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:37:34,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:37:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:37:34,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:37:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:37:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:37:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:37:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:37:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:37:34,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:37:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:37:34,895 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 09:37:34,999 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:37:35,001 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:37:35,304 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:37:35,375 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:37:35,375 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-08-04 09:37:35,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:37:35 BoogieIcfgContainer [2023-08-04 09:37:35,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:37:35,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:37:35,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:37:35,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:37:35,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:37:34" (1/3) ... [2023-08-04 09:37:35,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f56ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:37:35, skipping insertion in model container [2023-08-04 09:37:35,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:37:34" (2/3) ... [2023-08-04 09:37:35,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f56ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:37:35, skipping insertion in model container [2023-08-04 09:37:35,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:37:35" (3/3) ... [2023-08-04 09:37:35,383 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-prod-cons3.wvr_bound2.c [2023-08-04 09:37:35,388 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:37:35,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:37:35,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:37:35,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:37:35,448 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:37:35,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:35,704 INFO L124 PetriNetUnfolderBase]: 263/1537 cut-off events. [2023-08-04 09:37:35,704 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:37:35,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 1537 events. 263/1537 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9882 event pairs, 0 based on Foata normal form. 0/1292 useless extension candidates. Maximal degree in co-relation 878. Up to 33 conditions per place. [2023-08-04 09:37:35,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:35,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:35,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:37:35,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:35,752 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:35,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:35,905 INFO L124 PetriNetUnfolderBase]: 263/1537 cut-off events. [2023-08-04 09:37:35,906 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:37:35,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 1537 events. 263/1537 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9882 event pairs, 0 based on Foata normal form. 0/1292 useless extension candidates. Maximal degree in co-relation 878. Up to 33 conditions per place. [2023-08-04 09:37:35,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 8878 [2023-08-04 09:37:43,485 INFO L134 LiptonReduction]: Checked pairs total: 25617 [2023-08-04 09:37:43,486 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-08-04 09:37:43,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:37:43,503 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;@3d020728, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:37:43,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:37:43,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:37:43,511 INFO L124 PetriNetUnfolderBase]: 5/71 cut-off events. [2023-08-04 09:37:43,511 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:37:43,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:43,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:43,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:43,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1143672222, now seen corresponding path program 1 times [2023-08-04 09:37:43,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:43,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197189558] [2023-08-04 09:37:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:43,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:43,765 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 09:37:43,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:43,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197189558] [2023-08-04 09:37:43,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197189558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:43,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:37:43,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:37:43,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595387614] [2023-08-04 09:37:43,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:43,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:43,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:37:43,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 562 [2023-08-04 09:37:43,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 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 09:37:43,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:43,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 562 [2023-08-04 09:37:43,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:45,638 INFO L124 PetriNetUnfolderBase]: 18909/27070 cut-off events. [2023-08-04 09:37:45,639 INFO L125 PetriNetUnfolderBase]: For 1961/1961 co-relation queries the response was YES. [2023-08-04 09:37:45,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54015 conditions, 27070 events. 18909/27070 cut-off events. For 1961/1961 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 167795 event pairs, 11256 based on Foata normal form. 0/19704 useless extension candidates. Maximal degree in co-relation 45887. Up to 24785 conditions per place. [2023-08-04 09:37:45,821 INFO L140 encePairwiseOnDemand]: 558/562 looper letters, 61 selfloop transitions, 2 changer transitions 4/76 dead transitions. [2023-08-04 09:37:45,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 348 flow [2023-08-04 09:37:45,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 804 transitions. [2023-08-04 09:37:45,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47686832740213525 [2023-08-04 09:37:45,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 804 transitions. [2023-08-04 09:37:45,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 804 transitions. [2023-08-04 09:37:45,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:45,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 804 transitions. [2023-08-04 09:37:45,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 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 09:37:45,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:45,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:45,850 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 214 flow. Second operand 3 states and 804 transitions. [2023-08-04 09:37:45,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 348 flow [2023-08-04 09:37:45,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:37:45,861 INFO L231 Difference]: Finished difference. Result has 63 places, 69 transitions, 208 flow [2023-08-04 09:37:45,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=63, PETRI_TRANSITIONS=69} [2023-08-04 09:37:45,865 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:37:45,866 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 69 transitions, 208 flow [2023-08-04 09:37:45,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 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 09:37:45,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:45,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:45,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:37:45,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:45,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -447194013, now seen corresponding path program 1 times [2023-08-04 09:37:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:45,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405573117] [2023-08-04 09:37:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:45,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:46,026 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 09:37:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405573117] [2023-08-04 09:37:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405573117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584836801] [2023-08-04 09:37:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:46,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:46,031 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 09:37:46,047 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 09:37:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:46,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:46,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:46,153 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 09:37:46,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:46,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584836801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:46,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:46,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:37:46,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750011289] [2023-08-04 09:37:46,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:46,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:46,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:46,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 562 [2023-08-04 09:37:46,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 69 transitions, 208 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 09:37:46,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:46,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 562 [2023-08-04 09:37:46,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:47,691 INFO L124 PetriNetUnfolderBase]: 18235/26409 cut-off events. [2023-08-04 09:37:47,691 INFO L125 PetriNetUnfolderBase]: For 2040/2040 co-relation queries the response was YES. [2023-08-04 09:37:47,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52502 conditions, 26409 events. 18235/26409 cut-off events. For 2040/2040 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 167519 event pairs, 9350 based on Foata normal form. 0/19284 useless extension candidates. Maximal degree in co-relation 44377. Up to 24022 conditions per place. [2023-08-04 09:37:47,823 INFO L140 encePairwiseOnDemand]: 559/562 looper letters, 66 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 09:37:47,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 360 flow [2023-08-04 09:37:47,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 807 transitions. [2023-08-04 09:37:47,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786476868327402 [2023-08-04 09:37:47,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 807 transitions. [2023-08-04 09:37:47,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 807 transitions. [2023-08-04 09:37:47,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:47,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 807 transitions. [2023-08-04 09:37:47,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 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 09:37:47,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:47,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:47,830 INFO L175 Difference]: Start difference. First operand has 63 places, 69 transitions, 208 flow. Second operand 3 states and 807 transitions. [2023-08-04 09:37:47,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 360 flow [2023-08-04 09:37:47,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 341 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:37:47,970 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 197 flow [2023-08-04 09:37:47,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2023-08-04 09:37:47,971 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2023-08-04 09:37:47,971 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 197 flow [2023-08-04 09:37:47,971 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 09:37:47,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:47,972 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 09:37:47,989 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 09:37:48,172 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 09:37:48,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:48,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 46292023, now seen corresponding path program 1 times [2023-08-04 09:37:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:48,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703718822] [2023-08-04 09:37:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:48,260 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 09:37:48,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:48,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703718822] [2023-08-04 09:37:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703718822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398878122] [2023-08-04 09:37:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:48,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:48,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:48,281 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 09:37:48,343 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 09:37:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:48,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:48,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:48,431 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 09:37:48,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:48,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398878122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:48,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:48,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:37:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064221369] [2023-08-04 09:37:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:48,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:48,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 562 [2023-08-04 09:37:48,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 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 09:37:48,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:48,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 562 [2023-08-04 09:37:48,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:49,798 INFO L124 PetriNetUnfolderBase]: 17331/24885 cut-off events. [2023-08-04 09:37:49,798 INFO L125 PetriNetUnfolderBase]: For 641/641 co-relation queries the response was YES. [2023-08-04 09:37:49,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50426 conditions, 24885 events. 17331/24885 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 152752 event pairs, 9581 based on Foata normal form. 0/17972 useless extension candidates. Maximal degree in co-relation 22378. Up to 23131 conditions per place. [2023-08-04 09:37:49,919 INFO L140 encePairwiseOnDemand]: 559/562 looper letters, 69 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 09:37:49,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 361 flow [2023-08-04 09:37:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 810 transitions. [2023-08-04 09:37:49,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4804270462633452 [2023-08-04 09:37:49,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 810 transitions. [2023-08-04 09:37:49,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 810 transitions. [2023-08-04 09:37:49,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:49,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 810 transitions. [2023-08-04 09:37:49,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 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 09:37:49,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:49,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:49,926 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 197 flow. Second operand 3 states and 810 transitions. [2023-08-04 09:37:49,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 361 flow [2023-08-04 09:37:49,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:37:49,928 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 201 flow [2023-08-04 09:37:49,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2023-08-04 09:37:49,929 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2023-08-04 09:37:49,929 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 201 flow [2023-08-04 09:37:49,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 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 09:37:49,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:49,929 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 09:37:49,935 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 09:37:50,133 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 09:37:50,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:50,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash 887214063, now seen corresponding path program 1 times [2023-08-04 09:37:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:50,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570909426] [2023-08-04 09:37:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:50,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:50,176 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 09:37:50,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:50,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570909426] [2023-08-04 09:37:50,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570909426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:50,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245011276] [2023-08-04 09:37:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:50,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:50,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:50,184 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 09:37:50,349 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 09:37:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:50,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:50,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:50,442 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 09:37:50,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:50,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245011276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:50,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:50,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:37:50,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025393465] [2023-08-04 09:37:50,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:50,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:50,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:50,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 562 [2023-08-04 09:37:50,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 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 09:37:50,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:50,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 562 [2023-08-04 09:37:50,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:52,249 INFO L124 PetriNetUnfolderBase]: 17283/24877 cut-off events. [2023-08-04 09:37:52,249 INFO L125 PetriNetUnfolderBase]: For 807/807 co-relation queries the response was YES. [2023-08-04 09:37:52,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50575 conditions, 24877 events. 17283/24877 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 148507 event pairs, 10941 based on Foata normal form. 0/18124 useless extension candidates. Maximal degree in co-relation 22454. Up to 22201 conditions per place. [2023-08-04 09:37:52,364 INFO L140 encePairwiseOnDemand]: 559/562 looper letters, 70 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 09:37:52,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 369 flow [2023-08-04 09:37:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 811 transitions. [2023-08-04 09:37:52,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48102016607354686 [2023-08-04 09:37:52,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 811 transitions. [2023-08-04 09:37:52,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 811 transitions. [2023-08-04 09:37:52,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:52,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 811 transitions. [2023-08-04 09:37:52,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 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 09:37:52,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:52,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:52,374 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 201 flow. Second operand 3 states and 811 transitions. [2023-08-04 09:37:52,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 369 flow [2023-08-04 09:37:52,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 81 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:37:52,377 INFO L231 Difference]: Finished difference. Result has 60 places, 69 transitions, 205 flow [2023-08-04 09:37:52,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=60, PETRI_TRANSITIONS=69} [2023-08-04 09:37:52,378 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2023-08-04 09:37:52,378 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 69 transitions, 205 flow [2023-08-04 09:37:52,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 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 09:37:52,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:52,379 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 09:37:52,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:37:52,584 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 09:37:52,584 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:52,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash 419476645, now seen corresponding path program 1 times [2023-08-04 09:37:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:52,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102589138] [2023-08-04 09:37:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:52,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:52,664 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 09:37:52,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102589138] [2023-08-04 09:37:52,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102589138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078530404] [2023-08-04 09:37:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:52,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:52,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:52,670 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 09:37:52,672 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 09:37:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:52,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:52,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:52,792 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 09:37:52,792 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:52,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078530404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:52,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:52,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:37:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505636010] [2023-08-04 09:37:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:52,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:52,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:52,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 562 [2023-08-04 09:37:52,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 69 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 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 09:37:52,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:52,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 562 [2023-08-04 09:37:52,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:54,046 INFO L124 PetriNetUnfolderBase]: 11547/16789 cut-off events. [2023-08-04 09:37:54,046 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2023-08-04 09:37:54,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34860 conditions, 16789 events. 11547/16789 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 94611 event pairs, 7689 based on Foata normal form. 0/12338 useless extension candidates. Maximal degree in co-relation 14808. Up to 13929 conditions per place. [2023-08-04 09:37:54,126 INFO L140 encePairwiseOnDemand]: 559/562 looper letters, 75 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-04 09:37:54,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 402 flow [2023-08-04 09:37:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 816 transitions. [2023-08-04 09:37:54,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48398576512455516 [2023-08-04 09:37:54,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 816 transitions. [2023-08-04 09:37:54,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 816 transitions. [2023-08-04 09:37:54,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:54,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 816 transitions. [2023-08-04 09:37:54,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 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 09:37:54,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:54,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:54,137 INFO L175 Difference]: Start difference. First operand has 60 places, 69 transitions, 205 flow. Second operand 3 states and 816 transitions. [2023-08-04 09:37:54,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 402 flow [2023-08-04 09:37:54,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:37:54,141 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 213 flow [2023-08-04 09:37:54,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2023-08-04 09:37:54,142 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-08-04 09:37:54,142 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 213 flow [2023-08-04 09:37:54,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 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 09:37:54,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:54,143 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] [2023-08-04 09:37:54,163 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 09:37:54,348 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 09:37:54,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:54,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1712261186, now seen corresponding path program 1 times [2023-08-04 09:37:54,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:54,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223982968] [2023-08-04 09:37:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:54,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:54,432 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 09:37:54,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:54,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223982968] [2023-08-04 09:37:54,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223982968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:54,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606623252] [2023-08-04 09:37:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:54,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:54,434 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 09:37:54,436 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 09:37:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:54,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:54,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:54,553 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 09:37:54,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606623252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:37:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156426591] [2023-08-04 09:37:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:54,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 562 [2023-08-04 09:37:54,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 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 09:37:54,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:54,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 562 [2023-08-04 09:37:54,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:55,426 INFO L124 PetriNetUnfolderBase]: 8769/13031 cut-off events. [2023-08-04 09:37:55,426 INFO L125 PetriNetUnfolderBase]: For 887/887 co-relation queries the response was YES. [2023-08-04 09:37:55,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 13031 events. 8769/13031 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 72303 event pairs, 5854 based on Foata normal form. 0/10164 useless extension candidates. Maximal degree in co-relation 11838. Up to 10064 conditions per place. [2023-08-04 09:37:55,493 INFO L140 encePairwiseOnDemand]: 559/562 looper letters, 76 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 09:37:55,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 412 flow [2023-08-04 09:37:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 816 transitions. [2023-08-04 09:37:55,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48398576512455516 [2023-08-04 09:37:55,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 816 transitions. [2023-08-04 09:37:55,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 816 transitions. [2023-08-04 09:37:55,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:55,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 816 transitions. [2023-08-04 09:37:55,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 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 09:37:55,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:55,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:55,504 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 213 flow. Second operand 3 states and 816 transitions. [2023-08-04 09:37:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 412 flow [2023-08-04 09:37:55,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:37:55,525 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 223 flow [2023-08-04 09:37:55,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2023-08-04 09:37:55,525 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:37:55,525 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 223 flow [2023-08-04 09:37:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 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 09:37:55,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:55,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:55,531 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 09:37:55,731 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 09:37:55,731 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:55,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash 489659860, now seen corresponding path program 1 times [2023-08-04 09:37:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:55,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954589560] [2023-08-04 09:37:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:55,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:55,790 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 09:37:55,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:55,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954589560] [2023-08-04 09:37:55,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954589560] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:55,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744647867] [2023-08-04 09:37:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:55,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:55,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:55,793 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 09:37:55,820 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 09:37:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:55,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:55,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:55,899 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 09:37:55,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:55,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744647867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:55,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:55,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:37:55,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488142542] [2023-08-04 09:37:55,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:55,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:55,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:55,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:55,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:55,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 562 [2023-08-04 09:37:55,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 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 09:37:55,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:55,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 562 [2023-08-04 09:37:55,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:56,627 INFO L124 PetriNetUnfolderBase]: 8302/12322 cut-off events. [2023-08-04 09:37:56,628 INFO L125 PetriNetUnfolderBase]: For 1119/1119 co-relation queries the response was YES. [2023-08-04 09:37:56,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26870 conditions, 12322 events. 8302/12322 cut-off events. For 1119/1119 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 67792 event pairs, 6467 based on Foata normal form. 0/9842 useless extension candidates. Maximal degree in co-relation 18448. Up to 11034 conditions per place. [2023-08-04 09:37:56,678 INFO L140 encePairwiseOnDemand]: 559/562 looper letters, 77 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 09:37:56,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 424 flow [2023-08-04 09:37:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 816 transitions. [2023-08-04 09:37:56,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48398576512455516 [2023-08-04 09:37:56,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 816 transitions. [2023-08-04 09:37:56,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 816 transitions. [2023-08-04 09:37:56,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:56,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 816 transitions. [2023-08-04 09:37:56,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 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 09:37:56,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:56,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:56,684 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 223 flow. Second operand 3 states and 816 transitions. [2023-08-04 09:37:56,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 424 flow [2023-08-04 09:37:56,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:37:56,731 INFO L231 Difference]: Finished difference. Result has 65 places, 72 transitions, 233 flow [2023-08-04 09:37:56,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=233, PETRI_PLACES=65, PETRI_TRANSITIONS=72} [2023-08-04 09:37:56,732 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 09:37:56,732 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 72 transitions, 233 flow [2023-08-04 09:37:56,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 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 09:37:56,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:56,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:56,737 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 09:37:56,936 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 09:37:56,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:56,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:56,937 INFO L85 PathProgramCache]: Analyzing trace with hash 958661533, now seen corresponding path program 1 times [2023-08-04 09:37:56,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:56,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763084473] [2023-08-04 09:37:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:56,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:56,988 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 09:37:56,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763084473] [2023-08-04 09:37:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763084473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076783106] [2023-08-04 09:37:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:56,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:56,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:56,990 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 09:37:56,992 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 09:37:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:57,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:57,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:57,095 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 09:37:57,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:57,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076783106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:57,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:57,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:37:57,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778568296] [2023-08-04 09:37:57,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:57,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:57,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:57,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:57,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 562 [2023-08-04 09:37:57,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 72 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 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 09:37:57,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:57,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 562 [2023-08-04 09:37:57,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:57,974 INFO L124 PetriNetUnfolderBase]: 8288/12295 cut-off events. [2023-08-04 09:37:57,974 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2023-08-04 09:37:58,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26866 conditions, 12295 events. 8288/12295 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 67608 event pairs, 6706 based on Foata normal form. 0/9850 useless extension candidates. Maximal degree in co-relation 25144. Up to 11511 conditions per place. [2023-08-04 09:37:58,053 INFO L140 encePairwiseOnDemand]: 559/562 looper letters, 71 selfloop transitions, 2 changer transitions 2/84 dead transitions. [2023-08-04 09:37:58,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 407 flow [2023-08-04 09:37:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 811 transitions. [2023-08-04 09:37:58,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48102016607354686 [2023-08-04 09:37:58,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 811 transitions. [2023-08-04 09:37:58,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 811 transitions. [2023-08-04 09:37:58,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:58,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 811 transitions. [2023-08-04 09:37:58,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 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 09:37:58,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:58,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 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 09:37:58,062 INFO L175 Difference]: Start difference. First operand has 65 places, 72 transitions, 233 flow. Second operand 3 states and 811 transitions. [2023-08-04 09:37:58,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 407 flow [2023-08-04 09:37:58,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:37:58,118 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 235 flow [2023-08-04 09:37:58,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2023-08-04 09:37:58,118 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 09:37:58,118 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 235 flow [2023-08-04 09:37:58,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 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 09:37:58,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:58,119 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] [2023-08-04 09:37:58,124 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 09:37:58,321 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 09:37:58,321 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:58,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:58,322 INFO L85 PathProgramCache]: Analyzing trace with hash 249219392, now seen corresponding path program 1 times [2023-08-04 09:37:58,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:58,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439730158] [2023-08-04 09:37:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:58,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:58,399 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 09:37:58,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:58,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439730158] [2023-08-04 09:37:58,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439730158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:58,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870622700] [2023-08-04 09:37:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:58,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:58,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:58,400 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 09:37:58,403 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 09:37:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:58,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:37:58,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:58,541 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 09:37:58,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:37:58,559 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 09:37:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870622700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:37:58,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:37:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:37:58,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481518844] [2023-08-04 09:37:58,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:37:58,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:37:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:58,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:37:58,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:58,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 562 [2023-08-04 09:37:58,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 0 states have call successors, (0), 0 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 09:37:58,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:58,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 562 [2023-08-04 09:37:58,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:58,600 INFO L124 PetriNetUnfolderBase]: 12/28 cut-off events. [2023-08-04 09:37:58,601 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:37:58,601 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 39 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 09:37:58,601 INFO L140 encePairwiseOnDemand]: 559/562 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 09:37:58,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 16 transitions, 66 flow [2023-08-04 09:37:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:37:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:37:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 996 transitions. [2023-08-04 09:37:58,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430604982206406 [2023-08-04 09:37:58,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 996 transitions. [2023-08-04 09:37:58,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 996 transitions. [2023-08-04 09:37:58,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:58,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 996 transitions. [2023-08-04 09:37:58,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 09:37:58,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 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 09:37:58,607 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 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 09:37:58,607 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 235 flow. Second operand 4 states and 996 transitions. [2023-08-04 09:37:58,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 16 transitions, 66 flow [2023-08-04 09:37:58,608 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 09:37:58,608 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:37:58,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, 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 09:37:58,608 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -36 predicate places. [2023-08-04 09:37:58,608 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:37:58,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 0 states have call successors, (0), 0 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 09:37:58,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:37:58,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:37:58,816 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 09:37:58,816 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:58,819 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:37:58,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:58,977 INFO L124 PetriNetUnfolderBase]: 263/1537 cut-off events. [2023-08-04 09:37:58,977 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:37:58,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 1537 events. 263/1537 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9882 event pairs, 0 based on Foata normal form. 0/1292 useless extension candidates. Maximal degree in co-relation 878. Up to 33 conditions per place. [2023-08-04 09:37:58,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:58,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:58,988 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:37:58,988 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:58,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:58,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 295 transitions, 658 flow [2023-08-04 09:37:59,108 INFO L124 PetriNetUnfolderBase]: 263/1537 cut-off events. [2023-08-04 09:37:59,108 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:37:59,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 1537 events. 263/1537 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9882 event pairs, 0 based on Foata normal form. 0/1292 useless extension candidates. Maximal degree in co-relation 878. Up to 33 conditions per place. [2023-08-04 09:37:59,128 INFO L119 LiptonReduction]: Number of co-enabled transitions 8878 [2023-08-04 09:38:06,873 INFO L134 LiptonReduction]: Checked pairs total: 23594 [2023-08-04 09:38:06,874 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-04 09:38:06,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:38:06,876 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;@3d020728, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:38:06,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:38:06,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:38:06,881 INFO L124 PetriNetUnfolderBase]: 3/36 cut-off events. [2023-08-04 09:38:06,881 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:38:06,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:38:06,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:38:06,881 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 09:38:06,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:38:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash -558549551, now seen corresponding path program 1 times [2023-08-04 09:38:06,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:38:06,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220229800] [2023-08-04 09:38:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:06,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:38:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:38:06,901 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:38:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:38:06,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:38:06,942 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:38:06,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:38:06,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:38:06,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:38:06,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:38:06,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:38:06,943 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:38:06,944 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:38:06,944 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:38:06,944 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:38:06,978 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:38:06,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 352 transitions, 848 flow [2023-08-04 09:38:09,473 INFO L124 PetriNetUnfolderBase]: 5385/20085 cut-off events. [2023-08-04 09:38:09,474 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:38:09,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24470 conditions, 20085 events. 5385/20085 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 212488 event pairs, 162 based on Foata normal form. 0/17221 useless extension candidates. Maximal degree in co-relation 12117. Up to 1024 conditions per place. [2023-08-04 09:38:09,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 352 transitions, 848 flow [2023-08-04 09:38:09,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 352 transitions, 848 flow [2023-08-04 09:38:09,848 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:38:09,848 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 352 transitions, 848 flow [2023-08-04 09:38:09,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 352 transitions, 848 flow [2023-08-04 09:38:09,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 352 transitions, 848 flow [2023-08-04 09:38:11,764 INFO L124 PetriNetUnfolderBase]: 5385/20085 cut-off events. [2023-08-04 09:38:11,764 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:38:11,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24470 conditions, 20085 events. 5385/20085 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 212488 event pairs, 162 based on Foata normal form. 0/17221 useless extension candidates. Maximal degree in co-relation 12117. Up to 1024 conditions per place. [2023-08-04 09:38:12,153 INFO L119 LiptonReduction]: Number of co-enabled transitions 23220 [2023-08-04 09:38:19,661 INFO L134 LiptonReduction]: Checked pairs total: 91910 [2023-08-04 09:38:19,662 INFO L136 LiptonReduction]: Total number of compositions: 291 [2023-08-04 09:38:19,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:38:19,681 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;@3d020728, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:38:19,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:38:19,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:38:19,685 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-04 09:38:19,685 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:38:19,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:38:19,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:38:19,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:38:19,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:38:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1812289755, now seen corresponding path program 1 times [2023-08-04 09:38:19,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:38:19,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181116693] [2023-08-04 09:38:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:19,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:38:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:19,723 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 09:38:19,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:38:19,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181116693] [2023-08-04 09:38:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181116693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:38:19,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:38:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:38:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746027787] [2023-08-04 09:38:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:38:19,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:38:19,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:38:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:38:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:38:19,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 643 [2023-08-04 09:38:19,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 114 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 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 09:38:19,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:38:19,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 643 [2023-08-04 09:38:19,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand