/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-queue-add-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:39:19,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:39:19,859 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:39:19,862 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:39:19,862 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:39:19,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:39:19,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:39:19,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:39:19,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:39:19,902 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:39:19,903 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:39:19,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:39:19,903 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:39:19,905 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:39:19,905 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:39:19,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:39:19,905 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:39:19,905 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:39:19,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:39:19,906 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:39:19,906 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:39:19,906 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:39:19,907 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:39:19,907 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:39:19,908 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:39:19,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:39:19,908 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:39:19,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:39:19,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:39:19,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:39:19,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:39:19,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:39:19,910 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:39:19,910 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:39:19,911 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:39:19,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:39:19,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:39:19,911 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:39:19,911 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:39:19,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:39:19,911 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:39:19,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:39:20,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:39:20,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:39:20,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:39:20,180 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:39:20,182 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:39:20,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-3.wvr_bound2.c [2023-08-04 09:39:21,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:39:21,442 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:39:21,443 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-3.wvr_bound2.c [2023-08-04 09:39:21,451 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06c2ea216/59f8d16fea87489c85fdc87c9d045373/FLAG58527c962 [2023-08-04 09:39:21,466 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06c2ea216/59f8d16fea87489c85fdc87c9d045373 [2023-08-04 09:39:21,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:39:21,473 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:39:21,476 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:39:21,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:39:21,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:39:21,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24bbb230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21, skipping insertion in model container [2023-08-04 09:39:21,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,510 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:39:21,640 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-queue-add-3.wvr_bound2.c[3655,3668] [2023-08-04 09:39:21,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:39:21,655 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:39:21,676 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-queue-add-3.wvr_bound2.c[3655,3668] [2023-08-04 09:39:21,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:39:21,689 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:39:21,689 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:39:21,694 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:39:21,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21 WrapperNode [2023-08-04 09:39:21,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:39:21,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:39:21,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:39:21,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:39:21,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,758 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 300 [2023-08-04 09:39:21,758 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:39:21,759 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:39:21,759 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:39:21,759 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:39:21,766 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,795 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,797 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,798 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,801 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:39:21,802 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:39:21,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:39:21,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:39:21,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (1/1) ... [2023-08-04 09:39:21,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:39:21,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:21,839 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 09:39:21,858 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 09:39:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:39:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:39:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:39:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:39:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:39:21,880 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:39:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:39:21,880 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:39:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:39:21,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:39:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:39:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:39:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:39:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:39:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:39:21,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:39:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:39:21,885 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 09:39:22,016 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:39:22,018 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:39:22,380 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:39:22,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:39:22,516 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-04 09:39:22,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:39:22 BoogieIcfgContainer [2023-08-04 09:39:22,519 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:39:22,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:39:22,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:39:22,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:39:22,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:39:21" (1/3) ... [2023-08-04 09:39:22,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3527b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:39:22, skipping insertion in model container [2023-08-04 09:39:22,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:21" (2/3) ... [2023-08-04 09:39:22,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3527b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:39:22, skipping insertion in model container [2023-08-04 09:39:22,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:39:22" (3/3) ... [2023-08-04 09:39:22,528 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-queue-add-3.wvr_bound2.c [2023-08-04 09:39:22,535 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:39:22,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:39:22,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:39:22,543 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:39:22,650 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:39:22,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:22,873 INFO L124 PetriNetUnfolderBase]: 111/718 cut-off events. [2023-08-04 09:39:22,874 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:39:22,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 718 events. 111/718 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3275 event pairs, 0 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 431. Up to 16 conditions per place. [2023-08-04 09:39:22,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:22,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:22,898 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:22,910 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:22,913 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:22,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:22,996 INFO L124 PetriNetUnfolderBase]: 111/718 cut-off events. [2023-08-04 09:39:22,997 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:39:23,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 718 events. 111/718 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3275 event pairs, 0 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 431. Up to 16 conditions per place. [2023-08-04 09:39:23,009 INFO L119 LiptonReduction]: Number of co-enabled transitions 5638 [2023-08-04 09:39:30,227 INFO L134 LiptonReduction]: Checked pairs total: 11178 [2023-08-04 09:39:30,227 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-04 09:39:30,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:39:30,245 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;@22bd353c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:30,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:39:30,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:30,251 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 09:39:30,251 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:30,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:30,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:30,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:30,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1816517015, now seen corresponding path program 1 times [2023-08-04 09:39:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:30,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595615531] [2023-08-04 09:39:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:30,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:30,549 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 09:39:30,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:30,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595615531] [2023-08-04 09:39:30,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595615531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:30,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:39:30,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:39:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157192185] [2023-08-04 09:39:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:30,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:30,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:39:30,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 482 [2023-08-04 09:39:30,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 55 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 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 09:39:30,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:30,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 482 [2023-08-04 09:39:30,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:31,126 INFO L124 PetriNetUnfolderBase]: 2929/4223 cut-off events. [2023-08-04 09:39:31,126 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-08-04 09:39:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8525 conditions, 4223 events. 2929/4223 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21038 event pairs, 1480 based on Foata normal form. 0/2825 useless extension candidates. Maximal degree in co-relation 6868. Up to 4033 conditions per place. [2023-08-04 09:39:31,147 INFO L140 encePairwiseOnDemand]: 476/482 looper letters, 43 selfloop transitions, 2 changer transitions 4/55 dead transitions. [2023-08-04 09:39:31,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 244 flow [2023-08-04 09:39:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2023-08-04 09:39:31,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661134163208852 [2023-08-04 09:39:31,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2023-08-04 09:39:31,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2023-08-04 09:39:31,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:31,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2023-08-04 09:39:31,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 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 09:39:31,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:31,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:31,177 INFO L175 Difference]: Start difference. First operand has 46 places, 55 transitions, 152 flow. Second operand 3 states and 674 transitions. [2023-08-04 09:39:31,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 244 flow [2023-08-04 09:39:31,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:39:31,183 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 142 flow [2023-08-04 09:39:31,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2023-08-04 09:39:31,188 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 09:39:31,188 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 142 flow [2023-08-04 09:39:31,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 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 09:39:31,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:31,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:31,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:39:31,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:31,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:31,190 INFO L85 PathProgramCache]: Analyzing trace with hash -55810379, now seen corresponding path program 1 times [2023-08-04 09:39:31,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:31,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278614409] [2023-08-04 09:39:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:31,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:31,305 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 09:39:31,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:31,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278614409] [2023-08-04 09:39:31,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278614409] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:31,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371136546] [2023-08-04 09:39:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:31,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:31,311 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 09:39:31,320 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 09:39:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:31,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:31,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:31,437 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 09:39:31,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:31,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371136546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:31,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:31,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:31,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442760198] [2023-08-04 09:39:31,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:31,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:31,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:31,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:31,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:31,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 482 [2023-08-04 09:39:31,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 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 09:39:31,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:31,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 482 [2023-08-04 09:39:31,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:31,867 INFO L124 PetriNetUnfolderBase]: 2821/4048 cut-off events. [2023-08-04 09:39:31,867 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-08-04 09:39:31,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8174 conditions, 4048 events. 2821/4048 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19706 event pairs, 1702 based on Foata normal form. 0/2716 useless extension candidates. Maximal degree in co-relation 6518. Up to 3847 conditions per place. [2023-08-04 09:39:31,893 INFO L140 encePairwiseOnDemand]: 479/482 looper letters, 46 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2023-08-04 09:39:31,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 252 flow [2023-08-04 09:39:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2023-08-04 09:39:31,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661134163208852 [2023-08-04 09:39:31,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2023-08-04 09:39:31,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2023-08-04 09:39:31,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:31,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2023-08-04 09:39:31,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 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 09:39:31,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:31,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:31,908 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 142 flow. Second operand 3 states and 674 transitions. [2023-08-04 09:39:31,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 252 flow [2023-08-04 09:39:31,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:39:31,914 INFO L231 Difference]: Finished difference. Result has 43 places, 49 transitions, 134 flow [2023-08-04 09:39:31,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=49} [2023-08-04 09:39:31,915 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-04 09:39:31,915 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 49 transitions, 134 flow [2023-08-04 09:39:31,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 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 09:39:31,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:31,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:31,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:32,131 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 09:39:32,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:32,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -659474404, now seen corresponding path program 1 times [2023-08-04 09:39:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:32,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415905594] [2023-08-04 09:39:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:32,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:32,241 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 09:39:32,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415905594] [2023-08-04 09:39:32,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415905594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528835156] [2023-08-04 09:39:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:32,246 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 09:39:32,247 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 09:39:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:32,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:32,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:32,341 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 09:39:32,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:32,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528835156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:32,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:32,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:32,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513432452] [2023-08-04 09:39:32,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:32,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:32,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:32,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 482 [2023-08-04 09:39:32,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 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 09:39:32,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:32,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 482 [2023-08-04 09:39:32,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:32,751 INFO L124 PetriNetUnfolderBase]: 2809/4044 cut-off events. [2023-08-04 09:39:32,751 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-04 09:39:32,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8173 conditions, 4044 events. 2809/4044 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19600 event pairs, 1265 based on Foata normal form. 0/2741 useless extension candidates. Maximal degree in co-relation 3083. Up to 3661 conditions per place. [2023-08-04 09:39:32,771 INFO L140 encePairwiseOnDemand]: 479/482 looper letters, 49 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-04 09:39:32,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 256 flow [2023-08-04 09:39:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-08-04 09:39:32,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681881051175657 [2023-08-04 09:39:32,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-08-04 09:39:32,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-08-04 09:39:32,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:32,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-08-04 09:39:32,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 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 09:39:32,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:32,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:32,779 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 134 flow. Second operand 3 states and 677 transitions. [2023-08-04 09:39:32,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 256 flow [2023-08-04 09:39:32,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:32,782 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 138 flow [2023-08-04 09:39:32,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2023-08-04 09:39:32,783 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2023-08-04 09:39:32,783 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 138 flow [2023-08-04 09:39:32,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 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 09:39:32,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:32,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:32,795 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 09:39:32,989 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 09:39:32,990 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:32,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 277025044, now seen corresponding path program 1 times [2023-08-04 09:39:32,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:32,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377436315] [2023-08-04 09:39:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:33,074 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 09:39:33,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:33,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377436315] [2023-08-04 09:39:33,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377436315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:33,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76679284] [2023-08-04 09:39:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:33,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:33,077 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 09:39:33,079 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 09:39:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:33,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:33,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:33,167 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 09:39:33,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:33,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76679284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:33,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:33,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587208810] [2023-08-04 09:39:33,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:33,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:33,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:33,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 482 [2023-08-04 09:39:33,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 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 09:39:33,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:33,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 482 [2023-08-04 09:39:33,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:33,428 INFO L124 PetriNetUnfolderBase]: 1753/2588 cut-off events. [2023-08-04 09:39:33,429 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 09:39:33,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5382 conditions, 2588 events. 1753/2588 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11769 event pairs, 812 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 2196. Up to 1953 conditions per place. [2023-08-04 09:39:33,441 INFO L140 encePairwiseOnDemand]: 479/482 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 09:39:33,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 282 flow [2023-08-04 09:39:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:33,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-08-04 09:39:33,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470954356846473 [2023-08-04 09:39:33,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-08-04 09:39:33,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-08-04 09:39:33,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:33,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-08-04 09:39:33,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 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 09:39:33,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:33,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:33,449 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 138 flow. Second operand 3 states and 681 transitions. [2023-08-04 09:39:33,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 282 flow [2023-08-04 09:39:33,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:33,451 INFO L231 Difference]: Finished difference. Result has 45 places, 50 transitions, 146 flow [2023-08-04 09:39:33,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=50} [2023-08-04 09:39:33,451 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-04 09:39:33,451 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 50 transitions, 146 flow [2023-08-04 09:39:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 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 09:39:33,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:33,452 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] [2023-08-04 09:39:33,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:33,657 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 09:39:33,658 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:33,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1183634750, now seen corresponding path program 1 times [2023-08-04 09:39:33,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:33,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597775680] [2023-08-04 09:39:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:33,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:33,715 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 09:39:33,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:33,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597775680] [2023-08-04 09:39:33,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597775680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:33,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320076716] [2023-08-04 09:39:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:33,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:33,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:33,718 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 09:39:33,720 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 09:39:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:33,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:33,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:33,837 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 09:39:33,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:33,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320076716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:33,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423852801] [2023-08-04 09:39:33,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:33,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:33,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:33,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:33,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:33,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 482 [2023-08-04 09:39:33,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 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 09:39:33,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:33,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 482 [2023-08-04 09:39:33,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:34,076 INFO L124 PetriNetUnfolderBase]: 1470/2189 cut-off events. [2023-08-04 09:39:34,076 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2023-08-04 09:39:34,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4720 conditions, 2189 events. 1470/2189 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9435 event pairs, 784 based on Foata normal form. 0/1636 useless extension candidates. Maximal degree in co-relation 1871. Up to 1767 conditions per place. [2023-08-04 09:39:34,086 INFO L140 encePairwiseOnDemand]: 479/482 looper letters, 55 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 09:39:34,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 292 flow [2023-08-04 09:39:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-08-04 09:39:34,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470954356846473 [2023-08-04 09:39:34,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-08-04 09:39:34,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-08-04 09:39:34,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:34,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-08-04 09:39:34,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 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 09:39:34,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:34,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:34,093 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 146 flow. Second operand 3 states and 681 transitions. [2023-08-04 09:39:34,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 292 flow [2023-08-04 09:39:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:34,096 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 156 flow [2023-08-04 09:39:34,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2023-08-04 09:39:34,097 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 09:39:34,097 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 156 flow [2023-08-04 09:39:34,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 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 09:39:34,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:34,097 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] [2023-08-04 09:39:34,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:34,303 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 09:39:34,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:34,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1596453168, now seen corresponding path program 1 times [2023-08-04 09:39:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:34,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492822163] [2023-08-04 09:39:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:34,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:34,376 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 09:39:34,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:34,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492822163] [2023-08-04 09:39:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492822163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:34,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441613783] [2023-08-04 09:39:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:34,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:34,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:34,378 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 09:39:34,394 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 09:39:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:34,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:34,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:34,491 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 09:39:34,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:34,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441613783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:34,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:34,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:39:34,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861937045] [2023-08-04 09:39:34,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:34,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:34,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:34,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:34,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:34,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 482 [2023-08-04 09:39:34,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 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 09:39:34,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:34,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 482 [2023-08-04 09:39:34,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:34,721 INFO L124 PetriNetUnfolderBase]: 1457/2167 cut-off events. [2023-08-04 09:39:34,721 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-08-04 09:39:34,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4726 conditions, 2167 events. 1457/2167 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9350 event pairs, 901 based on Foata normal form. 0/1641 useless extension candidates. Maximal degree in co-relation 3635. Up to 2035 conditions per place. [2023-08-04 09:39:34,730 INFO L140 encePairwiseOnDemand]: 479/482 looper letters, 49 selfloop transitions, 2 changer transitions 3/60 dead transitions. [2023-08-04 09:39:34,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 282 flow [2023-08-04 09:39:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-08-04 09:39:34,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681881051175657 [2023-08-04 09:39:34,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-08-04 09:39:34,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-08-04 09:39:34,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:34,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-08-04 09:39:34,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 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 09:39:34,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:34,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 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 09:39:34,738 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 156 flow. Second operand 3 states and 677 transitions. [2023-08-04 09:39:34,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 282 flow [2023-08-04 09:39:34,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:34,741 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 154 flow [2023-08-04 09:39:34,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-04 09:39:34,742 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 09:39:34,742 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 154 flow [2023-08-04 09:39:34,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 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 09:39:34,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:34,743 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] [2023-08-04 09:39:34,751 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 09:39:34,948 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 09:39:34,949 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:34,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1715107485, now seen corresponding path program 1 times [2023-08-04 09:39:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:34,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080182264] [2023-08-04 09:39:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:34,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:35,024 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 09:39:35,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080182264] [2023-08-04 09:39:35,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080182264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779258113] [2023-08-04 09:39:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:35,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:35,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:35,028 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 09:39:35,031 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 09:39:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:35,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:39:35,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:39:35,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779258113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:35,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 09:39:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148340785] [2023-08-04 09:39:35,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:35,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:39:35,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:39:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:39:35,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 482 [2023-08-04 09:39:35,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 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 09:39:35,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:35,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 482 [2023-08-04 09:39:35,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:35,568 INFO L124 PetriNetUnfolderBase]: 1437/2174 cut-off events. [2023-08-04 09:39:35,569 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-08-04 09:39:35,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4736 conditions, 2174 events. 1437/2174 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 9518 event pairs, 905 based on Foata normal form. 125/1782 useless extension candidates. Maximal degree in co-relation 4591. Up to 1979 conditions per place. [2023-08-04 09:39:35,581 INFO L140 encePairwiseOnDemand]: 475/482 looper letters, 42 selfloop transitions, 2 changer transitions 45/95 dead transitions. [2023-08-04 09:39:35,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 95 transitions, 480 flow [2023-08-04 09:39:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:39:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:39:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1105 transitions. [2023-08-04 09:39:35,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45850622406639 [2023-08-04 09:39:35,584 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1105 transitions. [2023-08-04 09:39:35,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1105 transitions. [2023-08-04 09:39:35,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:35,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1105 transitions. [2023-08-04 09:39:35,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 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 09:39:35,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 482.0) internal successors, (2892), 6 states have internal predecessors, (2892), 0 states have call successors, (0), 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 09:39:35,591 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 482.0) internal successors, (2892), 6 states have internal predecessors, (2892), 0 states have call successors, (0), 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 09:39:35,591 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 154 flow. Second operand 5 states and 1105 transitions. [2023-08-04 09:39:35,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 95 transitions, 480 flow [2023-08-04 09:39:35,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:35,595 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 176 flow [2023-08-04 09:39:35,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-04 09:39:35,595 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-04 09:39:35,596 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 176 flow [2023-08-04 09:39:35,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 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 09:39:35,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:35,596 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] [2023-08-04 09:39:35,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:35,801 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 09:39:35,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:35,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1926983045, now seen corresponding path program 1 times [2023-08-04 09:39:35,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:35,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123019971] [2023-08-04 09:39:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:35,871 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 09:39:35,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123019971] [2023-08-04 09:39:35,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123019971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975144005] [2023-08-04 09:39:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:35,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:35,873 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 09:39:35,875 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 09:39:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:35,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:35,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:36,000 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 09:39:36,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:36,024 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 09:39:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975144005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:36,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366547998] [2023-08-04 09:39:36,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:36,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:36,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:36,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 482 [2023-08-04 09:39:36,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 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 09:39:36,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:36,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 482 [2023-08-04 09:39:36,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:36,059 INFO L124 PetriNetUnfolderBase]: 10/24 cut-off events. [2023-08-04 09:39:36,060 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 09:39:36,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 24 events. 10/24 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 1 based on Foata normal form. 3/21 useless extension candidates. Maximal degree in co-relation 76. Up to 13 conditions per place. [2023-08-04 09:39:36,060 INFO L140 encePairwiseOnDemand]: 479/482 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 09:39:36,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 15 transitions, 90 flow [2023-08-04 09:39:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 842 transitions. [2023-08-04 09:39:36,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367219917012448 [2023-08-04 09:39:36,062 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 842 transitions. [2023-08-04 09:39:36,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 842 transitions. [2023-08-04 09:39:36,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:36,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 842 transitions. [2023-08-04 09:39:36,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 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 09:39:36,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 09:39:36,069 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 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 09:39:36,069 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 176 flow. Second operand 4 states and 842 transitions. [2023-08-04 09:39:36,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 15 transitions, 90 flow [2023-08-04 09:39:36,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 66 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-04 09:39:36,070 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:39:36,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 09:39:36,072 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -24 predicate places. [2023-08-04 09:39:36,073 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:39:36,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 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 09:39:36,077 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:39:36,086 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 09:39:36,283 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 09:39:36,284 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:36,285 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:39:36,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:36,348 INFO L124 PetriNetUnfolderBase]: 111/718 cut-off events. [2023-08-04 09:39:36,348 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:39:36,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 718 events. 111/718 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3275 event pairs, 0 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 431. Up to 16 conditions per place. [2023-08-04 09:39:36,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:36,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:36,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:36,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:36,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:36,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 249 transitions, 540 flow [2023-08-04 09:39:36,409 INFO L124 PetriNetUnfolderBase]: 111/718 cut-off events. [2023-08-04 09:39:36,410 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:39:36,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 718 events. 111/718 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3275 event pairs, 0 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 431. Up to 16 conditions per place. [2023-08-04 09:39:36,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 5638 [2023-08-04 09:39:42,549 INFO L134 LiptonReduction]: Checked pairs total: 11264 [2023-08-04 09:39:42,550 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-04 09:39:42,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:39:42,552 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;@22bd353c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:42,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:39:42,555 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:42,555 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-08-04 09:39:42,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:42,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:42,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:42,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:39:42,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:42,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1175231490, now seen corresponding path program 1 times [2023-08-04 09:39:42,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:42,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616416437] [2023-08-04 09:39:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:42,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:39:42,629 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:39:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:39:42,678 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:39:42,680 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:39:42,680 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:39:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:39:42,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:39:42,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:39:42,681 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:39:42,682 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:39:42,682 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:39:42,682 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:39:42,719 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:39:42,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 293 transitions, 676 flow [2023-08-04 09:39:43,118 INFO L124 PetriNetUnfolderBase]: 919/4212 cut-off events. [2023-08-04 09:39:43,118 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:39:43,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4886 conditions, 4212 events. 919/4212 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 33168 event pairs, 22 based on Foata normal form. 0/3537 useless extension candidates. Maximal degree in co-relation 2523. Up to 192 conditions per place. [2023-08-04 09:39:43,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 293 transitions, 676 flow [2023-08-04 09:39:43,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 293 transitions, 676 flow [2023-08-04 09:39:43,153 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:43,153 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 293 transitions, 676 flow [2023-08-04 09:39:43,153 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 293 transitions, 676 flow [2023-08-04 09:39:43,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 293 transitions, 676 flow [2023-08-04 09:39:43,521 INFO L124 PetriNetUnfolderBase]: 919/4212 cut-off events. [2023-08-04 09:39:43,522 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:39:43,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4886 conditions, 4212 events. 919/4212 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 33168 event pairs, 22 based on Foata normal form. 0/3537 useless extension candidates. Maximal degree in co-relation 2523. Up to 192 conditions per place. [2023-08-04 09:39:43,614 INFO L119 LiptonReduction]: Number of co-enabled transitions 14672 [2023-08-04 09:39:50,142 INFO L134 LiptonReduction]: Checked pairs total: 42005 [2023-08-04 09:39:50,142 INFO L136 LiptonReduction]: Total number of compositions: 256 [2023-08-04 09:39:50,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:39:50,143 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;@22bd353c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:50,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:39:50,146 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:50,147 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-04 09:39:50,147 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:39:50,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:50,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:50,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:50,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1792893297, now seen corresponding path program 1 times [2023-08-04 09:39:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766770392] [2023-08-04 09:39:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:50,175 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 09:39:50,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:50,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766770392] [2023-08-04 09:39:50,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766770392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:50,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:39:50,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:39:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565408213] [2023-08-04 09:39:50,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:50,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:50,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:39:50,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:39:50,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 85 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:50,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:50,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:39:50,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:08,433 INFO L124 PetriNetUnfolderBase]: 863312/1046415 cut-off events. [2023-08-04 09:41:08,433 INFO L125 PetriNetUnfolderBase]: For 114258/114258 co-relation queries the response was YES. [2023-08-04 09:41:10,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2126358 conditions, 1046415 events. 863312/1046415 cut-off events. For 114258/114258 co-relation queries the response was YES. Maximal size of possible extension queue 19831. Compared 6031044 event pairs, 506278 based on Foata normal form. 0/723526 useless extension candidates. Maximal degree in co-relation 686974. Up to 1020094 conditions per place. [2023-08-04 09:41:14,279 INFO L140 encePairwiseOnDemand]: 541/549 looper letters, 67 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2023-08-04 09:41:14,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 396 flow [2023-08-04 09:41:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:41:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:41:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-08-04 09:41:14,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644808743169399 [2023-08-04 09:41:14,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-08-04 09:41:14,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-08-04 09:41:14,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:14,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-08-04 09:41:14,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 09:41:14,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:41:14,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:41:14,292 INFO L175 Difference]: Start difference. First operand has 68 places, 85 transitions, 260 flow. Second operand 3 states and 765 transitions. [2023-08-04 09:41:14,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 396 flow [2023-08-04 09:41:14,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:41:14,358 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 244 flow [2023-08-04 09:41:14,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2023-08-04 09:41:14,358 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 09:41:14,359 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 244 flow [2023-08-04 09:41:14,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:14,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:14,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:14,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:41:14,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:14,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:14,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1465555022, now seen corresponding path program 1 times [2023-08-04 09:41:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:14,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766858676] [2023-08-04 09:41:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:14,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:14,397 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 09:41:14,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:14,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766858676] [2023-08-04 09:41:14,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766858676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:14,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905249873] [2023-08-04 09:41:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:14,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:14,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:14,400 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 09:41:14,402 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 09:41:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:14,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:41:14,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:14,504 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 09:41:14,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:41:14,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905249873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:14,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:41:14,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:41:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271736658] [2023-08-04 09:41:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:14,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:14,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:14,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:41:14,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 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 09:41:14,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:14,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:41:14,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:42:32,244 INFO L124 PetriNetUnfolderBase]: 854062/1036254 cut-off events. [2023-08-04 09:42:32,244 INFO L125 PetriNetUnfolderBase]: For 110634/110634 co-relation queries the response was YES. [2023-08-04 09:42:34,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103948 conditions, 1036254 events. 854062/1036254 cut-off events. For 110634/110634 co-relation queries the response was YES. Maximal size of possible extension queue 20024. Compared 6012141 event pairs, 462054 based on Foata normal form. 0/716447 useless extension candidates. Maximal degree in co-relation 2103908. Up to 1008875 conditions per place. [2023-08-04 09:42:38,298 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 09:42:38,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 416 flow [2023-08-04 09:42:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:42:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:42:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2023-08-04 09:42:38,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650880388585307 [2023-08-04 09:42:38,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2023-08-04 09:42:38,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2023-08-04 09:42:38,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:42:38,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2023-08-04 09:42:38,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:38,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:42:38,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:42:38,306 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 244 flow. Second operand 3 states and 766 transitions. [2023-08-04 09:42:38,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 416 flow [2023-08-04 09:42:38,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 402 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:42:38,689 INFO L231 Difference]: Finished difference. Result has 66 places, 79 transitions, 242 flow [2023-08-04 09:42:38,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=79} [2023-08-04 09:42:38,690 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-04 09:42:38,690 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 79 transitions, 242 flow [2023-08-04 09:42:38,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 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 09:42:38,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:42:38,691 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 09:42:38,698 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 09:42:38,896 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,SelfDestructingSolverStorable10 [2023-08-04 09:42:38,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:42:38,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:42:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash 82960993, now seen corresponding path program 1 times [2023-08-04 09:42:38,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:42:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810846817] [2023-08-04 09:42:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:42:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:42:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:42:38,942 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 09:42:38,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:42:38,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810846817] [2023-08-04 09:42:38,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810846817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:42:38,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688108832] [2023-08-04 09:42:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:42:38,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:42:38,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:42:38,944 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:42:38,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:42:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:42:39,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:42:39,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:42:39,055 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 09:42:39,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:42:39,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688108832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:42:39,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:42:39,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:42:39,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984565769] [2023-08-04 09:42:39,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:42:39,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:42:39,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:42:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:42:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:42:39,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:42:39,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 79 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 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 09:42:39,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:42:39,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:42:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:43:54,504 INFO L124 PetriNetUnfolderBase]: 854586/1044176 cut-off events. [2023-08-04 09:43:54,505 INFO L125 PetriNetUnfolderBase]: For 57385/57385 co-relation queries the response was YES. [2023-08-04 09:43:56,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2111748 conditions, 1044176 events. 854586/1044176 cut-off events. For 57385/57385 co-relation queries the response was YES. Maximal size of possible extension queue 21236. Compared 6242299 event pairs, 474994 based on Foata normal form. 0/723916 useless extension candidates. Maximal degree in co-relation 721377. Up to 1000105 conditions per place. [2023-08-04 09:44:00,618 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 82 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-08-04 09:44:00,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 444 flow [2023-08-04 09:44:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:44:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:44:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-04 09:44:00,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693381906496661 [2023-08-04 09:44:00,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-04 09:44:00,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-04 09:44:00,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:44:00,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-04 09:44:00,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 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 09:44:00,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:44:00,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:44:00,632 INFO L175 Difference]: Start difference. First operand has 66 places, 79 transitions, 242 flow. Second operand 3 states and 773 transitions. [2023-08-04 09:44:00,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 444 flow [2023-08-04 09:44:00,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:44:00,668 INFO L231 Difference]: Finished difference. Result has 68 places, 80 transitions, 252 flow [2023-08-04 09:44:00,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=68, PETRI_TRANSITIONS=80} [2023-08-04 09:44:00,669 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-04 09:44:00,669 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 80 transitions, 252 flow [2023-08-04 09:44:00,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 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 09:44:00,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:44:00,669 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] [2023-08-04 09:44:00,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:44:00,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:44:00,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:44:00,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:44:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2141515628, now seen corresponding path program 1 times [2023-08-04 09:44:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:44:00,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840186559] [2023-08-04 09:44:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:44:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:44:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:44:00,915 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 09:44:00,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:44:00,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840186559] [2023-08-04 09:44:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840186559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:44:00,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004947044] [2023-08-04 09:44:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:44:00,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:44:00,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:44:00,917 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:44:00,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:44:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:44:01,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:44:01,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:44:01,031 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 09:44:01,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:44:01,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004947044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:44:01,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:44:01,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:44:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692964573] [2023-08-04 09:44:01,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:44:01,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:44:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:44:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:44:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:44:01,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:44:01,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 80 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 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 09:44:01,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:44:01,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:44:01,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:05,565 INFO L124 PetriNetUnfolderBase]: 713818/878328 cut-off events. [2023-08-04 09:45:05,565 INFO L125 PetriNetUnfolderBase]: For 41229/41229 co-relation queries the response was YES. [2023-08-04 09:45:07,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794159 conditions, 878328 events. 713818/878328 cut-off events. For 41229/41229 co-relation queries the response was YES. Maximal size of possible extension queue 16920. Compared 5269455 event pairs, 364892 based on Foata normal form. 0/620958 useless extension candidates. Maximal degree in co-relation 665835. Up to 693825 conditions per place. [2023-08-04 09:45:10,929 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 92 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-04 09:45:10,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 106 transitions, 507 flow [2023-08-04 09:45:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:45:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:45:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-04 09:45:10,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474802671523983 [2023-08-04 09:45:10,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-04 09:45:10,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-04 09:45:10,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:10,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-04 09:45:10,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:10,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:45:10,936 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:45:10,936 INFO L175 Difference]: Start difference. First operand has 68 places, 80 transitions, 252 flow. Second operand 3 states and 782 transitions. [2023-08-04 09:45:10,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 106 transitions, 507 flow [2023-08-04 09:45:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 106 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:45:10,980 INFO L231 Difference]: Finished difference. Result has 70 places, 81 transitions, 262 flow [2023-08-04 09:45:10,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=70, PETRI_TRANSITIONS=81} [2023-08-04 09:45:10,980 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 09:45:10,981 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 81 transitions, 262 flow [2023-08-04 09:45:10,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 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 09:45:10,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:10,981 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] [2023-08-04 09:45:10,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:45:11,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:45:11,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:11,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:11,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1583315412, now seen corresponding path program 1 times [2023-08-04 09:45:11,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:11,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258732883] [2023-08-04 09:45:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:11,414 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 09:45:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:11,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258732883] [2023-08-04 09:45:11,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258732883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:45:11,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697265620] [2023-08-04 09:45:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:11,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:11,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:11,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:45:11,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:45:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:11,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:45:11,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:45:11,548 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 09:45:11,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:45:11,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697265620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:11,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:45:11,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:45:11,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850352923] [2023-08-04 09:45:11,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:11,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:11,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:45:11,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:45:11,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 81 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 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 09:45:11,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:11,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:45:11,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:46:13,122 INFO L124 PetriNetUnfolderBase]: 642658/795332 cut-off events. [2023-08-04 09:46:13,122 INFO L125 PetriNetUnfolderBase]: For 92987/92987 co-relation queries the response was YES. [2023-08-04 09:46:15,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1669110 conditions, 795332 events. 642658/795332 cut-off events. For 92987/92987 co-relation queries the response was YES. Maximal size of possible extension queue 13310. Compared 4764860 event pairs, 332282 based on Foata normal form. 0/580250 useless extension candidates. Maximal degree in co-relation 649367. Up to 612419 conditions per place. [2023-08-04 09:46:18,013 INFO L140 encePairwiseOnDemand]: 546/549 looper letters, 93 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-04 09:46:18,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 519 flow [2023-08-04 09:46:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:46:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:46:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-04 09:46:18,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474802671523983 [2023-08-04 09:46:18,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-04 09:46:18,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-04 09:46:18,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:46:18,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-04 09:46:18,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:18,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:46:18,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 549.0) internal successors, (2196), 4 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:46:18,021 INFO L175 Difference]: Start difference. First operand has 70 places, 81 transitions, 262 flow. Second operand 3 states and 782 transitions. [2023-08-04 09:46:18,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 519 flow [2023-08-04 09:46:23,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:46:23,084 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 272 flow [2023-08-04 09:46:23,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=549, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-08-04 09:46:23,085 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 09:46:23,085 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 272 flow [2023-08-04 09:46:23,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 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 09:46:23,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:46:23,085 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 09:46:23,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 09:46:23,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:46:23,291 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:46:23,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:46:23,292 INFO L85 PathProgramCache]: Analyzing trace with hash -297960933, now seen corresponding path program 1 times [2023-08-04 09:46:23,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:46:23,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824585027] [2023-08-04 09:46:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:46:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:23,340 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 09:46:23,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:46:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824585027] [2023-08-04 09:46:23,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824585027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:46:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146661531] [2023-08-04 09:46:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:23,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:46:23,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:46:23,342 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:46:23,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:46:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:23,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:46:23,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:46:23,469 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 09:46:23,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:46:23,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146661531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:46:23,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:46:23,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:46:23,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509379617] [2023-08-04 09:46:23,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:46:23,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:46:23,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:46:23,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:46:23,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:46:23,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 549 [2023-08-04 09:46:23,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:23,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:46:23,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 549 [2023-08-04 09:46:23,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand