/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:03:13,544 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:03:13,580 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:03:13,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:03:13,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:03:13,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:03:13,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:03:13,601 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:03:13,601 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:03:13,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:03:13,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:03:13,602 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:03:13,602 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:03:13,602 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:03:13,603 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:03:13,603 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:03:13,603 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:03:13,603 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:03:13,603 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:03:13,604 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:03:13,604 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:03:13,604 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:03:13,605 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:03:13,605 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:03:13,605 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:03:13,605 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:03:13,605 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:03:13,606 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:03:13,606 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:03:13,606 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:03:13,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:03:13,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:03:13,607 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:03:13,607 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:03:13,607 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:03:13,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:03:13,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:03:13,607 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:03:13,608 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:03:13,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:03:13,608 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:03:13,608 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:03:13,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:03:13,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:03:13,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:03:13,775 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:03:13,777 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:03:13,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-04 09:03:14,765 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:03:14,895 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:03:14,895 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-04 09:03:14,900 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04dcaa98c/278746b6963d460b8fcf77405e2f5153/FLAGf9c0454e0 [2023-08-04 09:03:14,908 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04dcaa98c/278746b6963d460b8fcf77405e2f5153 [2023-08-04 09:03:14,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:03:14,911 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:03:14,912 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:03:14,912 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:03:14,914 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:03:14,915 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:03:14" (1/1) ... [2023-08-04 09:03:14,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7b933a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:14, skipping insertion in model container [2023-08-04 09:03:14,916 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:03:14" (1/1) ... [2023-08-04 09:03:14,938 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:03:15,052 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c[2590,2603] [2023-08-04 09:03:15,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:03:15,064 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:03:15,080 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c[2590,2603] [2023-08-04 09:03:15,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:03:15,089 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:03:15,089 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:03:15,098 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:03:15,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15 WrapperNode [2023-08-04 09:03:15,099 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:03:15,100 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:03:15,100 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:03:15,100 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:03:15,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,109 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,126 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 178 [2023-08-04 09:03:15,126 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:03:15,126 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:03:15,127 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:03:15,127 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:03:15,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,135 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,135 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:03:15,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:03:15,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:03:15,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:03:15,162 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (1/1) ... [2023-08-04 09:03:15,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:03:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:15,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 09:03:15,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:03:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:03:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:03:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:03:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:03:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:03:15,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:03:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:03:15,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:03:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:03:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:03:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:03:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:03:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:03:15,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:03:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:03:15,237 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:03:15,336 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:03:15,337 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:03:15,565 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:03:15,653 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:03:15,653 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 09:03:15,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:03:15 BoogieIcfgContainer [2023-08-04 09:03:15,655 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:03:15,658 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:03:15,658 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:03:15,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:03:15,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:03:14" (1/3) ... [2023-08-04 09:03:15,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1a0744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:03:15, skipping insertion in model container [2023-08-04 09:03:15,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:03:15" (2/3) ... [2023-08-04 09:03:15,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1a0744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:03:15, skipping insertion in model container [2023-08-04 09:03:15,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:03:15" (3/3) ... [2023-08-04 09:03:15,663 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-04 09:03:15,668 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:03:15,676 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:03:15,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:03:15,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:03:15,748 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:03:15,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:15,866 INFO L124 PetriNetUnfolderBase]: 36/282 cut-off events. [2023-08-04 09:03:15,866 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:03:15,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 36/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 905 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-04 09:03:15,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:15,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:15,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:15,888 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:15,890 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:15,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:15,918 INFO L124 PetriNetUnfolderBase]: 36/282 cut-off events. [2023-08-04 09:03:15,918 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:03:15,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 36/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 905 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-04 09:03:15,922 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-04 09:03:19,047 INFO L134 LiptonReduction]: Checked pairs total: 4239 [2023-08-04 09:03:19,047 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-04 09:03:19,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:03:19,069 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;@62c6ab22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:19,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:03:19,072 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:19,072 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 09:03:19,072 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:19,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:19,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:03:19,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:19,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1979957239, now seen corresponding path program 1 times [2023-08-04 09:03:19,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:19,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711244356] [2023-08-04 09:03:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:19,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:03:19,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:19,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711244356] [2023-08-04 09:03:19,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711244356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:19,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:19,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:03:19,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402960091] [2023-08-04 09:03:19,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:19,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:19,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:03:19,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 268 [2023-08-04 09:03:19,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:19,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 268 [2023-08-04 09:03:19,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:19,413 INFO L124 PetriNetUnfolderBase]: 401/647 cut-off events. [2023-08-04 09:03:19,413 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 09:03:19,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 647 events. 401/647 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2793 event pairs, 142 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 1109. Up to 605 conditions per place. [2023-08-04 09:03:19,418 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 28 selfloop transitions, 2 changer transitions 3/37 dead transitions. [2023-08-04 09:03:19,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 158 flow [2023-08-04 09:03:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-04 09:03:19,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48134328358208955 [2023-08-04 09:03:19,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-04 09:03:19,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-04 09:03:19,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:19,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-04 09:03:19,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,444 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 90 flow. Second operand 3 states and 387 transitions. [2023-08-04 09:03:19,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 158 flow [2023-08-04 09:03:19,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:03:19,448 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 88 flow [2023-08-04 09:03:19,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-04 09:03:19,452 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-04 09:03:19,453 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 88 flow [2023-08-04 09:03:19,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:19,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:03:19,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:19,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash -43531243, now seen corresponding path program 1 times [2023-08-04 09:03:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:19,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259885287] [2023-08-04 09:03:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:03:19,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:19,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259885287] [2023-08-04 09:03:19,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259885287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:19,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357580708] [2023-08-04 09:03:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:19,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:19,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:19,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:19,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:03:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:19,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:19,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:03:19,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:19,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357580708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:19,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:19,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:19,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882415985] [2023-08-04 09:03:19,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:19,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:19,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:19,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 268 [2023-08-04 09:03:19,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:19,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 268 [2023-08-04 09:03:19,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:19,776 INFO L124 PetriNetUnfolderBase]: 397/629 cut-off events. [2023-08-04 09:03:19,776 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 09:03:19,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 629 events. 397/629 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2590 event pairs, 142 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 1087. Up to 558 conditions per place. [2023-08-04 09:03:19,780 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 31 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2023-08-04 09:03:19,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 38 transitions, 170 flow [2023-08-04 09:03:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-04 09:03:19,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48383084577114427 [2023-08-04 09:03:19,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-04 09:03:19,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-04 09:03:19,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:19,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-04 09:03:19,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,787 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 88 flow. Second operand 3 states and 389 transitions. [2023-08-04 09:03:19,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 38 transitions, 170 flow [2023-08-04 09:03:19,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 38 transitions, 160 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:03:19,789 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 86 flow [2023-08-04 09:03:19,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2023-08-04 09:03:19,790 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-04 09:03:19,790 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 86 flow [2023-08-04 09:03:19,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:19,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:19,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:19,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:20,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:20,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:20,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash 981539913, now seen corresponding path program 1 times [2023-08-04 09:03:20,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:20,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680149711] [2023-08-04 09:03:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:20,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:03:20,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680149711] [2023-08-04 09:03:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680149711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161596819] [2023-08-04 09:03:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:20,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:20,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:20,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:03:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:20,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:20,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:03:20,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:20,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161596819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:20,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:20,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:20,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642480750] [2023-08-04 09:03:20,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:20,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:20,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:20,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:20,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:20,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 268 [2023-08-04 09:03:20,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:20,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 268 [2023-08-04 09:03:20,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:20,252 INFO L124 PetriNetUnfolderBase]: 259/427 cut-off events. [2023-08-04 09:03:20,252 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-04 09:03:20,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 427 events. 259/427 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1578 event pairs, 94 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 374. Up to 283 conditions per place. [2023-08-04 09:03:20,254 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 35 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-04 09:03:20,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 184 flow [2023-08-04 09:03:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-04 09:03:20,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48756218905472637 [2023-08-04 09:03:20,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-04 09:03:20,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-04 09:03:20,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:20,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-04 09:03:20,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,262 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 86 flow. Second operand 3 states and 392 transitions. [2023-08-04 09:03:20,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 184 flow [2023-08-04 09:03:20,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:20,264 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 94 flow [2023-08-04 09:03:20,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2023-08-04 09:03:20,266 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-04 09:03:20,266 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 94 flow [2023-08-04 09:03:20,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:20,266 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 09:03:20,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:20,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:03:20,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:20,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1720214068, now seen corresponding path program 1 times [2023-08-04 09:03:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:20,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260825694] [2023-08-04 09:03:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:03:20,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:20,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260825694] [2023-08-04 09:03:20,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260825694] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:20,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100872707] [2023-08-04 09:03:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:20,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:20,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:20,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:03:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:20,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:20,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:20,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100872707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:20,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:03:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304468318] [2023-08-04 09:03:20,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:20,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:20,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 268 [2023-08-04 09:03:20,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:20,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 268 [2023-08-04 09:03:20,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:20,744 INFO L124 PetriNetUnfolderBase]: 248/410 cut-off events. [2023-08-04 09:03:20,744 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-04 09:03:20,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 410 events. 248/410 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1470 event pairs, 131 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 393. Up to 356 conditions per place. [2023-08-04 09:03:20,747 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 31 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2023-08-04 09:03:20,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 178 flow [2023-08-04 09:03:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-04 09:03:20,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48383084577114427 [2023-08-04 09:03:20,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-04 09:03:20,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-04 09:03:20,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:20,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-04 09:03:20,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,754 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 94 flow. Second operand 3 states and 389 transitions. [2023-08-04 09:03:20,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 178 flow [2023-08-04 09:03:20,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:20,756 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 96 flow [2023-08-04 09:03:20,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-04 09:03:20,757 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-04 09:03:20,757 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 96 flow [2023-08-04 09:03:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:20,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:20,758 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 09:03:20,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:20,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:20,964 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:20,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash -379937168, now seen corresponding path program 1 times [2023-08-04 09:03:20,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:20,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717030001] [2023-08-04 09:03:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:20,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:21,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:21,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717030001] [2023-08-04 09:03:21,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717030001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:21,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889351092] [2023-08-04 09:03:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:21,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:21,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:21,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:21,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:03:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:21,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:03:21,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:21,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889351092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:21,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:21,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:03:21,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530591298] [2023-08-04 09:03:21,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:21,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:21,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:21,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 268 [2023-08-04 09:03:21,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:21,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:21,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 268 [2023-08-04 09:03:21,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:21,173 INFO L124 PetriNetUnfolderBase]: 11/26 cut-off events. [2023-08-04 09:03:21,174 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:03:21,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 26 events. 11/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 38 event pairs, 1 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 55. Up to 17 conditions per place. [2023-08-04 09:03:21,174 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-04 09:03:21,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 14 transitions, 58 flow [2023-08-04 09:03:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:03:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:03:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-04 09:03:21,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496268656716418 [2023-08-04 09:03:21,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-04 09:03:21,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-04 09:03:21,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:21,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-04 09:03:21,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:21,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:21,178 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:21,178 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 96 flow. Second operand 4 states and 482 transitions. [2023-08-04 09:03:21,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 14 transitions, 58 flow [2023-08-04 09:03:21,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:21,179 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 09:03:21,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 09:03:21,179 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -14 predicate places. [2023-08-04 09:03:21,179 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 09:03:21,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:21,181 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:03:21,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:21,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:21,387 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 09:03:21,388 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:03:21,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:21,402 INFO L124 PetriNetUnfolderBase]: 36/282 cut-off events. [2023-08-04 09:03:21,402 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:03:21,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 36/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 905 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-04 09:03:21,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:21,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:21,403 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:21,403 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:21,403 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:21,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 09:03:21,424 INFO L124 PetriNetUnfolderBase]: 36/282 cut-off events. [2023-08-04 09:03:21,424 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:03:21,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 36/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 905 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-04 09:03:21,426 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-04 09:03:24,389 INFO L134 LiptonReduction]: Checked pairs total: 3933 [2023-08-04 09:03:24,389 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-04 09:03:24,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:03:24,391 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;@62c6ab22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:24,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:03:24,394 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:24,394 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2023-08-04 09:03:24,394 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:24,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:24,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:03:24,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:03:24,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1842196037, now seen corresponding path program 1 times [2023-08-04 09:03:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017632071] [2023-08-04 09:03:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:03:24,426 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:03:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:03:24,453 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:03:24,454 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:03:24,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:03:24,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:03:24,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 09:03:24,457 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:03:24,458 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:03:24,458 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:03:24,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:03:24,482 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:03:24,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 09:03:24,541 INFO L124 PetriNetUnfolderBase]: 137/862 cut-off events. [2023-08-04 09:03:24,542 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:03:24,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 862 events. 137/862 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4356 event pairs, 1 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 520. Up to 32 conditions per place. [2023-08-04 09:03:24,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 09:03:24,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 169 transitions, 386 flow [2023-08-04 09:03:24,548 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:24,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 09:03:24,549 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 09:03:24,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 09:03:24,605 INFO L124 PetriNetUnfolderBase]: 137/862 cut-off events. [2023-08-04 09:03:24,606 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:03:24,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 862 events. 137/862 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4356 event pairs, 1 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 520. Up to 32 conditions per place. [2023-08-04 09:03:24,618 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-04 09:03:27,837 INFO L134 LiptonReduction]: Checked pairs total: 12775 [2023-08-04 09:03:27,837 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-04 09:03:27,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:03:27,849 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;@62c6ab22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:27,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:03:27,851 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:27,851 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 09:03:27,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:27,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:27,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:03:27,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:27,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1622182984, now seen corresponding path program 1 times [2023-08-04 09:03:27,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:27,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796392006] [2023-08-04 09:03:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:27,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:03:27,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:27,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796392006] [2023-08-04 09:03:27,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796392006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:27,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:27,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:03:27,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938803673] [2023-08-04 09:03:27,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:27,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:27,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:03:27,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 310 [2023-08-04 09:03:27,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:27,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:27,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 310 [2023-08-04 09:03:27,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:29,681 INFO L124 PetriNetUnfolderBase]: 20561/26499 cut-off events. [2023-08-04 09:03:29,682 INFO L125 PetriNetUnfolderBase]: For 2083/2083 co-relation queries the response was YES. [2023-08-04 09:03:29,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53600 conditions, 26499 events. 20561/26499 cut-off events. For 2083/2083 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 131181 event pairs, 9671 based on Foata normal form. 0/16789 useless extension candidates. Maximal degree in co-relation 20216. Up to 25630 conditions per place. [2023-08-04 09:03:29,794 INFO L140 encePairwiseOnDemand]: 306/310 looper letters, 42 selfloop transitions, 2 changer transitions 2/54 dead transitions. [2023-08-04 09:03:29,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2023-08-04 09:03:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 09:03:29,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4881720430107527 [2023-08-04 09:03:29,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 09:03:29,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 09:03:29,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:29,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 09:03:29,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:29,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:29,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:29,799 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 148 flow. Second operand 3 states and 454 transitions. [2023-08-04 09:03:29,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2023-08-04 09:03:29,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:03:29,803 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 146 flow [2023-08-04 09:03:29,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=48, PETRI_TRANSITIONS=48} [2023-08-04 09:03:29,804 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 09:03:29,805 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 146 flow [2023-08-04 09:03:29,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:29,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:29,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:29,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:03:29,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:29,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:29,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1258607042, now seen corresponding path program 1 times [2023-08-04 09:03:29,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:29,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561937270] [2023-08-04 09:03:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:29,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:03:29,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:29,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561937270] [2023-08-04 09:03:29,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561937270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:29,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285327144] [2023-08-04 09:03:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:29,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:29,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:29,844 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:29,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:03:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:29,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:29,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:03:29,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:29,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285327144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:29,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:29,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:29,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980506915] [2023-08-04 09:03:29,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:29,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:29,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:29,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:29,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 310 [2023-08-04 09:03:29,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:29,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:29,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 310 [2023-08-04 09:03:29,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:31,554 INFO L124 PetriNetUnfolderBase]: 20611/26555 cut-off events. [2023-08-04 09:03:31,555 INFO L125 PetriNetUnfolderBase]: For 1945/1945 co-relation queries the response was YES. [2023-08-04 09:03:31,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53588 conditions, 26555 events. 20611/26555 cut-off events. For 1945/1945 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 132306 event pairs, 9644 based on Foata normal form. 0/16793 useless extension candidates. Maximal degree in co-relation 53548. Up to 25348 conditions per place. [2023-08-04 09:03:31,673 INFO L140 encePairwiseOnDemand]: 307/310 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 09:03:31,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 270 flow [2023-08-04 09:03:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-04 09:03:31,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935483870967742 [2023-08-04 09:03:31,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-04 09:03:31,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-04 09:03:31,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:31,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-04 09:03:31,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:31,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:31,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:31,677 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 146 flow. Second operand 3 states and 459 transitions. [2023-08-04 09:03:31,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 270 flow [2023-08-04 09:03:31,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:03:31,684 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 150 flow [2023-08-04 09:03:31,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2023-08-04 09:03:31,685 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-08-04 09:03:31,685 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 150 flow [2023-08-04 09:03:31,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:31,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:31,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:31,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:31,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:31,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:31,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2115077648, now seen corresponding path program 1 times [2023-08-04 09:03:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:31,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63237717] [2023-08-04 09:03:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:03:31,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:31,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63237717] [2023-08-04 09:03:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63237717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911989717] [2023-08-04 09:03:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:31,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:31,927 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:31,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:03:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:31,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:31,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:03:31,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:31,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911989717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:31,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:31,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:31,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764222036] [2023-08-04 09:03:31,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:31,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:31,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:31,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:32,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 310 [2023-08-04 09:03:32,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:32,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:32,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 310 [2023-08-04 09:03:32,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:33,214 INFO L124 PetriNetUnfolderBase]: 16691/21872 cut-off events. [2023-08-04 09:03:33,214 INFO L125 PetriNetUnfolderBase]: For 1304/1304 co-relation queries the response was YES. [2023-08-04 09:03:33,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 21872 events. 16691/21872 cut-off events. For 1304/1304 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 111053 event pairs, 6754 based on Foata normal form. 0/14543 useless extension candidates. Maximal degree in co-relation 12865. Up to 15187 conditions per place. [2023-08-04 09:03:33,301 INFO L140 encePairwiseOnDemand]: 307/310 looper letters, 57 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-04 09:03:33,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 314 flow [2023-08-04 09:03:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 09:03:33,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010752688172043 [2023-08-04 09:03:33,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 09:03:33,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 09:03:33,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:33,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 09:03:33,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:33,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:33,305 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:33,305 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 150 flow. Second operand 3 states and 466 transitions. [2023-08-04 09:03:33,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 314 flow [2023-08-04 09:03:33,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:33,307 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 160 flow [2023-08-04 09:03:33,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=160, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-08-04 09:03:33,307 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 09:03:33,308 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 160 flow [2023-08-04 09:03:33,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:33,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:33,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:33,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:33,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:33,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:33,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash 370736083, now seen corresponding path program 1 times [2023-08-04 09:03:33,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:33,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174767471] [2023-08-04 09:03:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:03:33,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:33,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174767471] [2023-08-04 09:03:33,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174767471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:33,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867514511] [2023-08-04 09:03:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:33,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:33,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:33,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:33,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:03:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:33,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:33,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:33,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:33,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867514511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:33,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:33,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:03:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44179299] [2023-08-04 09:03:33,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:33,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:33,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:33,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:33,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:33,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 310 [2023-08-04 09:03:33,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:33,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:33,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 310 [2023-08-04 09:03:33,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:35,080 INFO L124 PetriNetUnfolderBase]: 16210/21375 cut-off events. [2023-08-04 09:03:35,080 INFO L125 PetriNetUnfolderBase]: For 3547/3547 co-relation queries the response was YES. [2023-08-04 09:03:35,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45455 conditions, 21375 events. 16210/21375 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 107804 event pairs, 7857 based on Foata normal form. 0/14819 useless extension candidates. Maximal degree in co-relation 13533. Up to 16941 conditions per place. [2023-08-04 09:03:35,141 INFO L140 encePairwiseOnDemand]: 307/310 looper letters, 58 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-04 09:03:35,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 326 flow [2023-08-04 09:03:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 09:03:35,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010752688172043 [2023-08-04 09:03:35,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 09:03:35,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 09:03:35,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:35,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 09:03:35,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:35,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:35,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:35,145 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 160 flow. Second operand 3 states and 466 transitions. [2023-08-04 09:03:35,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 326 flow [2023-08-04 09:03:35,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 68 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:35,177 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 170 flow [2023-08-04 09:03:35,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=170, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-04 09:03:35,177 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-04 09:03:35,177 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 170 flow [2023-08-04 09:03:35,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:35,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:35,178 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] [2023-08-04 09:03:35,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 09:03:35,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:35,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:35,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:35,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1842807022, now seen corresponding path program 1 times [2023-08-04 09:03:35,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:35,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961790571] [2023-08-04 09:03:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:35,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:35,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961790571] [2023-08-04 09:03:35,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961790571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689397230] [2023-08-04 09:03:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:35,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:35,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:35,419 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:35,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:03:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:35,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:03:35,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:35,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:03:35,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689397230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:35,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:35,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:03:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173668506] [2023-08-04 09:03:35,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:35,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:35,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 310 [2023-08-04 09:03:35,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 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 09:03:35,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:35,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 310 [2023-08-04 09:03:35,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:36,721 INFO L124 PetriNetUnfolderBase]: 14752/19404 cut-off events. [2023-08-04 09:03:36,722 INFO L125 PetriNetUnfolderBase]: For 2793/2793 co-relation queries the response was YES. [2023-08-04 09:03:36,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41594 conditions, 19404 events. 14752/19404 cut-off events. For 2793/2793 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 95808 event pairs, 4723 based on Foata normal form. 4/13530 useless extension candidates. Maximal degree in co-relation 30283. Up to 18612 conditions per place. [2023-08-04 09:03:36,793 INFO L140 encePairwiseOnDemand]: 306/310 looper letters, 50 selfloop transitions, 3 changer transitions 1/62 dead transitions. [2023-08-04 09:03:36,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 300 flow [2023-08-04 09:03:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:03:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:03:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-08-04 09:03:36,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774193548387097 [2023-08-04 09:03:36,795 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-08-04 09:03:36,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-08-04 09:03:36,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:36,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-08-04 09:03:36,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:36,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:36,803 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:36,803 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 170 flow. Second operand 4 states and 592 transitions. [2023-08-04 09:03:36,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 300 flow [2023-08-04 09:03:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:36,859 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 182 flow [2023-08-04 09:03:36,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-04 09:03:36,860 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-04 09:03:36,860 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 182 flow [2023-08-04 09:03:36,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 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 09:03:36,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:36,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:36,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:37,066 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 09:03:37,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:37,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash 27930232, now seen corresponding path program 1 times [2023-08-04 09:03:37,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:37,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797826771] [2023-08-04 09:03:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:37,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:03:37,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:37,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797826771] [2023-08-04 09:03:37,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797826771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199774134] [2023-08-04 09:03:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:37,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:37,108 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 09:03:37,110 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 09:03:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:37,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:03:37,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:03:37,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:03:37,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199774134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:37,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:37,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:03:37,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151996879] [2023-08-04 09:03:37,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:37,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:37,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:37,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:37,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:37,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 310 [2023-08-04 09:03:37,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:37,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:37,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 310 [2023-08-04 09:03:37,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:38,368 INFO L124 PetriNetUnfolderBase]: 14164/18597 cut-off events. [2023-08-04 09:03:38,369 INFO L125 PetriNetUnfolderBase]: For 1841/1841 co-relation queries the response was YES. [2023-08-04 09:03:38,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39751 conditions, 18597 events. 14164/18597 cut-off events. For 1841/1841 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 93442 event pairs, 4159 based on Foata normal form. 64/13014 useless extension candidates. Maximal degree in co-relation 28552. Up to 14457 conditions per place. [2023-08-04 09:03:38,434 INFO L140 encePairwiseOnDemand]: 306/310 looper letters, 62 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 09:03:38,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 360 flow [2023-08-04 09:03:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:03:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:03:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-04 09:03:38,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4870967741935484 [2023-08-04 09:03:38,436 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-04 09:03:38,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-04 09:03:38,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:38,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-04 09:03:38,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:38,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:38,439 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:38,439 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 182 flow. Second operand 4 states and 604 transitions. [2023-08-04 09:03:38,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 360 flow [2023-08-04 09:03:38,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 351 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:03:38,476 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 187 flow [2023-08-04 09:03:38,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-08-04 09:03:38,477 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-04 09:03:38,477 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 187 flow [2023-08-04 09:03:38,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:38,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:38,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:38,482 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 09:03:38,681 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 09:03:38,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:38,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2018844735, now seen corresponding path program 1 times [2023-08-04 09:03:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:38,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007703525] [2023-08-04 09:03:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:38,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:03:38,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007703525] [2023-08-04 09:03:38,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007703525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251169230] [2023-08-04 09:03:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:38,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:38,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:38,731 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 09:03:38,755 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 09:03:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:38,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:03:38,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:03:38,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:03:38,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251169230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:38,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:38,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:03:38,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663514143] [2023-08-04 09:03:38,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:38,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:38,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:38,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:38,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:38,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 310 [2023-08-04 09:03:38,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:38,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:38,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 310 [2023-08-04 09:03:38,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:39,676 INFO L124 PetriNetUnfolderBase]: 9736/12905 cut-off events. [2023-08-04 09:03:39,676 INFO L125 PetriNetUnfolderBase]: For 3592/3592 co-relation queries the response was YES. [2023-08-04 09:03:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28107 conditions, 12905 events. 9736/12905 cut-off events. For 3592/3592 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 60785 event pairs, 2097 based on Foata normal form. 256/9250 useless extension candidates. Maximal degree in co-relation 25906. Up to 4752 conditions per place. [2023-08-04 09:03:39,727 INFO L140 encePairwiseOnDemand]: 306/310 looper letters, 69 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-04 09:03:39,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 402 flow [2023-08-04 09:03:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:03:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:03:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-04 09:03:39,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49274193548387096 [2023-08-04 09:03:39,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-04 09:03:39,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-04 09:03:39,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:39,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-04 09:03:39,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:39,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:39,733 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:39,733 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 187 flow. Second operand 4 states and 611 transitions. [2023-08-04 09:03:39,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 402 flow [2023-08-04 09:03:39,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 392 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:03:39,751 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 198 flow [2023-08-04 09:03:39,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-08-04 09:03:39,753 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-08-04 09:03:39,753 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 198 flow [2023-08-04 09:03:39,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:39,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:39,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:39,758 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 09:03:39,954 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 09:03:39,955 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:39,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash -449889716, now seen corresponding path program 1 times [2023-08-04 09:03:39,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:39,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999938875] [2023-08-04 09:03:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:39,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:03:39,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999938875] [2023-08-04 09:03:39,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999938875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420424723] [2023-08-04 09:03:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:39,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:39,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:39,995 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 09:03:39,997 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 09:03:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:40,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:03:40,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:03:40,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:03:40,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420424723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:40,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:40,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:03:40,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325888024] [2023-08-04 09:03:40,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:40,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:40,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:40,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 310 [2023-08-04 09:03:40,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:40,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:40,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 310 [2023-08-04 09:03:40,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:41,044 INFO L124 PetriNetUnfolderBase]: 9716/12870 cut-off events. [2023-08-04 09:03:41,045 INFO L125 PetriNetUnfolderBase]: For 5569/5569 co-relation queries the response was YES. [2023-08-04 09:03:41,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29327 conditions, 12870 events. 9716/12870 cut-off events. For 5569/5569 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 60482 event pairs, 5425 based on Foata normal form. 17/8984 useless extension candidates. Maximal degree in co-relation 27113. Up to 11417 conditions per place. [2023-08-04 09:03:41,126 INFO L140 encePairwiseOnDemand]: 306/310 looper letters, 69 selfloop transitions, 3 changer transitions 2/82 dead transitions. [2023-08-04 09:03:41,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 414 flow [2023-08-04 09:03:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:03:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:03:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-04 09:03:41,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49274193548387096 [2023-08-04 09:03:41,128 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-04 09:03:41,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-04 09:03:41,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:41,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-04 09:03:41,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:41,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:41,131 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:41,131 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 198 flow. Second operand 4 states and 611 transitions. [2023-08-04 09:03:41,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 414 flow [2023-08-04 09:03:41,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 82 transitions, 410 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:41,163 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 202 flow [2023-08-04 09:03:41,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2023-08-04 09:03:41,163 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2023-08-04 09:03:41,163 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 202 flow [2023-08-04 09:03:41,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:41,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:41,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:41,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:41,372 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 09:03:41,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:41,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:41,373 INFO L85 PathProgramCache]: Analyzing trace with hash -868584044, now seen corresponding path program 1 times [2023-08-04 09:03:41,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:41,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712147598] [2023-08-04 09:03:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:41,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 09:03:41,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:41,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712147598] [2023-08-04 09:03:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712147598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:41,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:41,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 09:03:41,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390702574] [2023-08-04 09:03:41,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:41,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:41,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:41,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:03:41,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 310 [2023-08-04 09:03:41,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:41,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:41,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 310 [2023-08-04 09:03:41,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:42,736 INFO L124 PetriNetUnfolderBase]: 12781/16588 cut-off events. [2023-08-04 09:03:42,737 INFO L125 PetriNetUnfolderBase]: For 9165/9165 co-relation queries the response was YES. [2023-08-04 09:03:42,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38350 conditions, 16588 events. 12781/16588 cut-off events. For 9165/9165 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 82764 event pairs, 2086 based on Foata normal form. 1/11588 useless extension candidates. Maximal degree in co-relation 37976. Up to 13221 conditions per place. [2023-08-04 09:03:42,824 INFO L140 encePairwiseOnDemand]: 304/310 looper letters, 75 selfloop transitions, 5 changer transitions 1/89 dead transitions. [2023-08-04 09:03:42,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 530 flow [2023-08-04 09:03:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-04 09:03:42,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150537634408602 [2023-08-04 09:03:42,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-04 09:03:42,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-04 09:03:42,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:42,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-04 09:03:42,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:42,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:42,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:42,829 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 202 flow. Second operand 3 states and 479 transitions. [2023-08-04 09:03:42,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 530 flow [2023-08-04 09:03:42,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 514 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:03:42,858 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 227 flow [2023-08-04 09:03:42,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-04 09:03:42,858 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2023-08-04 09:03:42,858 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 227 flow [2023-08-04 09:03:42,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:42,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:42,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 09:03:42,859 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:42,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1308403658, now seen corresponding path program 1 times [2023-08-04 09:03:42,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240686756] [2023-08-04 09:03:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:03:43,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:43,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240686756] [2023-08-04 09:03:43,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240686756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:43,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:43,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:03:43,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944358344] [2023-08-04 09:03:43,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:43,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:43,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:43,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:43,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:43,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 310 [2023-08-04 09:03:43,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:43,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:43,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 310 [2023-08-04 09:03:43,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:44,854 INFO L124 PetriNetUnfolderBase]: 22735/30648 cut-off events. [2023-08-04 09:03:44,855 INFO L125 PetriNetUnfolderBase]: For 15502/15502 co-relation queries the response was YES. [2023-08-04 09:03:44,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77253 conditions, 30648 events. 22735/30648 cut-off events. For 15502/15502 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 173563 event pairs, 9944 based on Foata normal form. 0/22788 useless extension candidates. Maximal degree in co-relation 76499. Up to 16723 conditions per place. [2023-08-04 09:03:45,050 INFO L140 encePairwiseOnDemand]: 305/310 looper letters, 114 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2023-08-04 09:03:45,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 125 transitions, 773 flow [2023-08-04 09:03:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:03:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:03:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-04 09:03:45,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4870967741935484 [2023-08-04 09:03:45,052 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-04 09:03:45,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-04 09:03:45,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:45,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-04 09:03:45,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:45,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:45,055 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:45,055 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 227 flow. Second operand 5 states and 755 transitions. [2023-08-04 09:03:45,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 125 transitions, 773 flow [2023-08-04 09:03:45,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 125 transitions, 762 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:45,211 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 253 flow [2023-08-04 09:03:45,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-08-04 09:03:45,211 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-08-04 09:03:45,212 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 253 flow [2023-08-04 09:03:45,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:45,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:45,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:45,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 09:03:45,212 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:45,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1812633902, now seen corresponding path program 1 times [2023-08-04 09:03:45,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:45,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397132450] [2023-08-04 09:03:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:45,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:03:45,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:45,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397132450] [2023-08-04 09:03:45,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397132450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:45,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:45,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:03:45,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737092201] [2023-08-04 09:03:45,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:45,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:45,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:45,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:45,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:45,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 310 [2023-08-04 09:03:45,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:45,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:45,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 310 [2023-08-04 09:03:45,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:46,802 INFO L124 PetriNetUnfolderBase]: 17893/24821 cut-off events. [2023-08-04 09:03:46,802 INFO L125 PetriNetUnfolderBase]: For 12852/13400 co-relation queries the response was YES. [2023-08-04 09:03:46,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62139 conditions, 24821 events. 17893/24821 cut-off events. For 12852/13400 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 142952 event pairs, 11194 based on Foata normal form. 548/20704 useless extension candidates. Maximal degree in co-relation 61439. Up to 16436 conditions per place. [2023-08-04 09:03:46,925 INFO L140 encePairwiseOnDemand]: 305/310 looper letters, 117 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2023-08-04 09:03:46,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 129 transitions, 817 flow [2023-08-04 09:03:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:03:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:03:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-08-04 09:03:46,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890322580645161 [2023-08-04 09:03:46,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-08-04 09:03:46,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-08-04 09:03:46,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:46,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-08-04 09:03:46,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:46,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:46,931 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:46,931 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 253 flow. Second operand 5 states and 758 transitions. [2023-08-04 09:03:46,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 129 transitions, 817 flow [2023-08-04 09:03:47,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 129 transitions, 813 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:47,078 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 266 flow [2023-08-04 09:03:47,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2023-08-04 09:03:47,079 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-08-04 09:03:47,079 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 266 flow [2023-08-04 09:03:47,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:47,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:47,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:47,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 09:03:47,080 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:47,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -30553236, now seen corresponding path program 1 times [2023-08-04 09:03:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:47,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844705004] [2023-08-04 09:03:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:47,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:03:47,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:47,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844705004] [2023-08-04 09:03:47,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844705004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:47,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:03:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393165133] [2023-08-04 09:03:47,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:47,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 310 [2023-08-04 09:03:47,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:47,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:47,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 310 [2023-08-04 09:03:47,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:48,439 INFO L124 PetriNetUnfolderBase]: 15000/20876 cut-off events. [2023-08-04 09:03:48,439 INFO L125 PetriNetUnfolderBase]: For 12669/13403 co-relation queries the response was YES. [2023-08-04 09:03:48,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53945 conditions, 20876 events. 15000/20876 cut-off events. For 12669/13403 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 118657 event pairs, 8884 based on Foata normal form. 734/19286 useless extension candidates. Maximal degree in co-relation 53301. Up to 16442 conditions per place. [2023-08-04 09:03:48,547 INFO L140 encePairwiseOnDemand]: 305/310 looper letters, 108 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-04 09:03:48,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 781 flow [2023-08-04 09:03:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:03:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:03:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-08-04 09:03:48,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48516129032258065 [2023-08-04 09:03:48,549 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-08-04 09:03:48,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-08-04 09:03:48,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:48,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-08-04 09:03:48,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:48,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:48,552 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:48,552 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 266 flow. Second operand 5 states and 752 transitions. [2023-08-04 09:03:48,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 781 flow [2023-08-04 09:03:48,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 121 transitions, 776 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:48,649 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 278 flow [2023-08-04 09:03:48,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2023-08-04 09:03:48,649 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2023-08-04 09:03:48,649 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 278 flow [2023-08-04 09:03:48,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:48,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:48,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:48,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 09:03:48,650 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:48,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash -3540276, now seen corresponding path program 1 times [2023-08-04 09:03:48,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:48,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731831760] [2023-08-04 09:03:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:48,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:03:48,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731831760] [2023-08-04 09:03:48,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731831760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:48,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:48,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 09:03:48,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047910974] [2023-08-04 09:03:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:48,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:48,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 310 [2023-08-04 09:03:48,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:48,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:48,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 310 [2023-08-04 09:03:48,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:49,948 INFO L124 PetriNetUnfolderBase]: 13428/18485 cut-off events. [2023-08-04 09:03:49,948 INFO L125 PetriNetUnfolderBase]: For 12564/12989 co-relation queries the response was YES. [2023-08-04 09:03:50,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49217 conditions, 18485 events. 13428/18485 cut-off events. For 12564/12989 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 100316 event pairs, 8318 based on Foata normal form. 425/18172 useless extension candidates. Maximal degree in co-relation 48701. Up to 16452 conditions per place. [2023-08-04 09:03:50,082 INFO L140 encePairwiseOnDemand]: 305/310 looper letters, 47 selfloop transitions, 2 changer transitions 56/112 dead transitions. [2023-08-04 09:03:50,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 722 flow [2023-08-04 09:03:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:03:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:03:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 744 transitions. [2023-08-04 09:03:50,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-08-04 09:03:50,084 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 744 transitions. [2023-08-04 09:03:50,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 744 transitions. [2023-08-04 09:03:50,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:50,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 744 transitions. [2023-08-04 09:03:50,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:50,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:50,087 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:50,087 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 278 flow. Second operand 5 states and 744 transitions. [2023-08-04 09:03:50,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 722 flow [2023-08-04 09:03:50,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 112 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:50,168 INFO L231 Difference]: Finished difference. Result has 81 places, 56 transitions, 250 flow [2023-08-04 09:03:50,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=81, PETRI_TRANSITIONS=56} [2023-08-04 09:03:50,169 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 35 predicate places. [2023-08-04 09:03:50,169 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 56 transitions, 250 flow [2023-08-04 09:03:50,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:50,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:50,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:50,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 09:03:50,169 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:50,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash 763576261, now seen corresponding path program 1 times [2023-08-04 09:03:50,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:50,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238389561] [2023-08-04 09:03:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:50,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:03:50,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:50,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238389561] [2023-08-04 09:03:50,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238389561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:50,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217899319] [2023-08-04 09:03:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:50,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:50,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:50,269 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 09:03:50,270 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 09:03:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:50,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:03:50,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:03:50,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:03:50,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217899319] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:50,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:03:50,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-04 09:03:50,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146949711] [2023-08-04 09:03:50,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:50,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:50,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:03:50,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 310 [2023-08-04 09:03:50,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 56 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:50,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:50,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 310 [2023-08-04 09:03:50,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:51,773 INFO L124 PetriNetUnfolderBase]: 13428/17842 cut-off events. [2023-08-04 09:03:51,773 INFO L125 PetriNetUnfolderBase]: For 14137/14137 co-relation queries the response was YES. [2023-08-04 09:03:51,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49792 conditions, 17842 events. 13428/17842 cut-off events. For 14137/14137 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 89255 event pairs, 4611 based on Foata normal form. 771/18613 useless extension candidates. Maximal degree in co-relation 49761. Up to 9559 conditions per place. [2023-08-04 09:03:51,860 INFO L140 encePairwiseOnDemand]: 304/310 looper letters, 76 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2023-08-04 09:03:51,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 568 flow [2023-08-04 09:03:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:03:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:03:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 710 transitions. [2023-08-04 09:03:51,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2023-08-04 09:03:51,862 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 710 transitions. [2023-08-04 09:03:51,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 710 transitions. [2023-08-04 09:03:51,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:51,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 710 transitions. [2023-08-04 09:03:51,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:51,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:51,865 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:51,865 INFO L175 Difference]: Start difference. First operand has 81 places, 56 transitions, 250 flow. Second operand 5 states and 710 transitions. [2023-08-04 09:03:51,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 568 flow [2023-08-04 09:03:51,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 540 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-08-04 09:03:51,937 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 257 flow [2023-08-04 09:03:51,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-08-04 09:03:51,938 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2023-08-04 09:03:51,938 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 257 flow [2023-08-04 09:03:51,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:51,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:51,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:51,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:52,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:52,142 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:52,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash 194011605, now seen corresponding path program 1 times [2023-08-04 09:03:52,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:52,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35393256] [2023-08-04 09:03:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:52,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:03:52,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:52,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35393256] [2023-08-04 09:03:52,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35393256] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:52,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316823981] [2023-08-04 09:03:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:52,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:52,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:52,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:52,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:03:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:52,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:03:52,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:03:52,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:03:52,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316823981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:52,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:52,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-08-04 09:03:52,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474509948] [2023-08-04 09:03:52,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:52,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 09:03:52,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:52,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 09:03:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:03:52,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 310 [2023-08-04 09:03:52,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 257 flow. Second operand has 10 states, 10 states have (on average 132.5) internal successors, (1325), 10 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:52,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:52,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 310 [2023-08-04 09:03:52,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:53,622 INFO L124 PetriNetUnfolderBase]: 13574/18039 cut-off events. [2023-08-04 09:03:53,623 INFO L125 PetriNetUnfolderBase]: For 18030/19820 co-relation queries the response was YES. [2023-08-04 09:03:53,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49742 conditions, 18039 events. 13574/18039 cut-off events. For 18030/19820 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 89794 event pairs, 5588 based on Foata normal form. 1790/16528 useless extension candidates. Maximal degree in co-relation 49709. Up to 9185 conditions per place. [2023-08-04 09:03:53,737 INFO L140 encePairwiseOnDemand]: 304/310 looper letters, 114 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2023-08-04 09:03:53,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 128 transitions, 835 flow [2023-08-04 09:03:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 09:03:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 09:03:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 870 transitions. [2023-08-04 09:03:53,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2023-08-04 09:03:53,739 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 870 transitions. [2023-08-04 09:03:53,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 870 transitions. [2023-08-04 09:03:53,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:53,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 870 transitions. [2023-08-04 09:03:53,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:53,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:53,742 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:53,742 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 257 flow. Second operand 6 states and 870 transitions. [2023-08-04 09:03:53,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 128 transitions, 835 flow [2023-08-04 09:03:53,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 128 transitions, 823 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:03:53,789 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 283 flow [2023-08-04 09:03:53,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2023-08-04 09:03:53,789 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-08-04 09:03:53,789 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 283 flow [2023-08-04 09:03:53,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.5) internal successors, (1325), 10 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:53,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:53,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:53,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-04 09:03:53,991 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:53,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2133842737, now seen corresponding path program 1 times [2023-08-04 09:03:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:53,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109760786] [2023-08-04 09:03:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:53,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:03:54,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:54,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109760786] [2023-08-04 09:03:54,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109760786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:54,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631307785] [2023-08-04 09:03:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:54,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:54,079 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:54,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:03:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:54,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:03:54,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:03:54,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:03:54,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631307785] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:54,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:03:54,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-04 09:03:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676514444] [2023-08-04 09:03:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:54,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:54,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:03:54,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 310 [2023-08-04 09:03:54,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:54,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:54,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 310 [2023-08-04 09:03:54,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:55,521 INFO L124 PetriNetUnfolderBase]: 12603/16853 cut-off events. [2023-08-04 09:03:55,521 INFO L125 PetriNetUnfolderBase]: For 24010/27066 co-relation queries the response was YES. [2023-08-04 09:03:55,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50928 conditions, 16853 events. 12603/16853 cut-off events. For 24010/27066 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 84172 event pairs, 4989 based on Foata normal form. 3056/17999 useless extension candidates. Maximal degree in co-relation 50892. Up to 9811 conditions per place. [2023-08-04 09:03:55,591 INFO L140 encePairwiseOnDemand]: 304/310 looper letters, 79 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2023-08-04 09:03:55,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 615 flow [2023-08-04 09:03:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:03:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:03:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 707 transitions. [2023-08-04 09:03:55,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561290322580645 [2023-08-04 09:03:55,594 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 707 transitions. [2023-08-04 09:03:55,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 707 transitions. [2023-08-04 09:03:55,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:55,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 707 transitions. [2023-08-04 09:03:55,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:55,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:55,597 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:55,597 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 283 flow. Second operand 5 states and 707 transitions. [2023-08-04 09:03:55,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 615 flow [2023-08-04 09:03:55,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 612 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:55,625 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 307 flow [2023-08-04 09:03:55,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2023-08-04 09:03:55,626 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2023-08-04 09:03:55,626 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 307 flow [2023-08-04 09:03:55,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:55,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:55,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:55,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:55,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:55,831 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:55,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash 819052315, now seen corresponding path program 1 times [2023-08-04 09:03:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006245656] [2023-08-04 09:03:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:03:55,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:55,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006245656] [2023-08-04 09:03:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006245656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:55,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579748533] [2023-08-04 09:03:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:55,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:55,918 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:55,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:03:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:56,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:03:56,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:03:56,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:03:56,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579748533] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:56,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:03:56,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2023-08-04 09:03:56,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312410069] [2023-08-04 09:03:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:56,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:03:56,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 310 [2023-08-04 09:03:56,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 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 09:03:56,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:56,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 310 [2023-08-04 09:03:56,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:57,240 INFO L124 PetriNetUnfolderBase]: 11689/15803 cut-off events. [2023-08-04 09:03:57,240 INFO L125 PetriNetUnfolderBase]: For 30234/34558 co-relation queries the response was YES. [2023-08-04 09:03:57,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52713 conditions, 15803 events. 11689/15803 cut-off events. For 30234/34558 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 79061 event pairs, 5169 based on Foata normal form. 4324/19576 useless extension candidates. Maximal degree in co-relation 52674. Up to 9815 conditions per place. [2023-08-04 09:03:57,340 INFO L140 encePairwiseOnDemand]: 304/310 looper letters, 78 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-08-04 09:03:57,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 644 flow [2023-08-04 09:03:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:03:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:03:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2023-08-04 09:03:57,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45483870967741935 [2023-08-04 09:03:57,342 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2023-08-04 09:03:57,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2023-08-04 09:03:57,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:57,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2023-08-04 09:03:57,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 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 09:03:57,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:57,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:57,345 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 307 flow. Second operand 5 states and 705 transitions. [2023-08-04 09:03:57,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 644 flow [2023-08-04 09:03:57,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 634 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:03:57,379 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 327 flow [2023-08-04 09:03:57,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2023-08-04 09:03:57,379 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2023-08-04 09:03:57,379 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 327 flow [2023-08-04 09:03:57,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 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 09:03:57,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:57,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:57,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 09:03:57,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:57,584 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:57,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash 995154883, now seen corresponding path program 1 times [2023-08-04 09:03:57,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:57,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8770336] [2023-08-04 09:03:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:57,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:03:58,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8770336] [2023-08-04 09:03:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8770336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659974827] [2023-08-04 09:03:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:58,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:58,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:58,462 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:03:58,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:03:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:58,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-04 09:03:58,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:58,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 09:03:58,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:03:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:03:58,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 09:03:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:03:58,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 09:03:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:03:58,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:59,102 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_609 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset) c_~counter~0)) (forall ((v_ArrVal_609 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-08-04 09:03:59,228 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= |c_thread1Thread1of2ForFork1_~tmp~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset) |c_thread1Thread1of2ForFork1_~tmp~0#1|))) is different from false [2023-08-04 09:03:59,245 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~counter~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of2ForFork1_~i~0#1| 4)))))) (and (forall ((v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= .cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset) .cse0)))) is different from false [2023-08-04 09:03:59,255 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~counter~0))) (and (forall ((v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset) .cse0)) (forall ((v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= .cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-08-04 09:03:59,301 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_607 (Array Int Int)) (v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_607) c_~A~0.base) c_~A~0.offset) c_~counter~0) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_607 (Array Int Int)) (v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) c_~A~0.base) c_~A~0.offset) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_607) c_~A~0.base) c_~A~0.offset) c_~counter~0)))) is different from false [2023-08-04 09:03:59,313 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_607 (Array Int Int)) (v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= (+ c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_607) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (forall ((v_ArrVal_607 (Array Int Int)) (v_ArrVal_609 (Array Int Int)) (v_ArrVal_608 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_608) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_609) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_607) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-08-04 09:03:59,322 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:03:59,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-08-04 09:03:59,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 128 [2023-08-04 09:03:59,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-04 09:03:59,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-08-04 09:03:59,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-08-04 09:03:59,360 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:03:59,361 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-08-04 09:03:59,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 09:03:59,364 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 09:03:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 11 not checked. [2023-08-04 09:03:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659974827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:59,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 29 [2023-08-04 09:03:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027570461] [2023-08-04 09:03:59,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:59,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-04 09:03:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:59,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-04 09:03:59,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=516, Unknown=10, NotChecked=306, Total=930 [2023-08-04 09:03:59,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 310 [2023-08-04 09:03:59,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 327 flow. Second operand has 31 states, 31 states have (on average 102.64516129032258) internal successors, (3182), 31 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:59,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:59,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 310 [2023-08-04 09:03:59,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:07,251 INFO L124 PetriNetUnfolderBase]: 48755/65855 cut-off events. [2023-08-04 09:04:07,251 INFO L125 PetriNetUnfolderBase]: For 123570/135414 co-relation queries the response was YES. [2023-08-04 09:04:07,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233899 conditions, 65855 events. 48755/65855 cut-off events. For 123570/135414 co-relation queries the response was YES. Maximal size of possible extension queue 1519. Compared 395980 event pairs, 6284 based on Foata normal form. 11846/77687 useless extension candidates. Maximal degree in co-relation 233857. Up to 20715 conditions per place. [2023-08-04 09:04:07,683 INFO L140 encePairwiseOnDemand]: 298/310 looper letters, 584 selfloop transitions, 73 changer transitions 2/665 dead transitions. [2023-08-04 09:04:07,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 665 transitions, 4780 flow [2023-08-04 09:04:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-04 09:04:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-04 09:04:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2962 transitions. [2023-08-04 09:04:07,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981182795698925 [2023-08-04 09:04:07,688 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2962 transitions. [2023-08-04 09:04:07,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2962 transitions. [2023-08-04 09:04:07,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:07,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2962 transitions. [2023-08-04 09:04:07,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 123.41666666666667) internal successors, (2962), 24 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:07,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 310.0) internal successors, (7750), 25 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:07,698 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 310.0) internal successors, (7750), 25 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:07,698 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 327 flow. Second operand 24 states and 2962 transitions. [2023-08-04 09:04:07,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 665 transitions, 4780 flow [2023-08-04 09:04:07,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 665 transitions, 4735 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:04:07,925 INFO L231 Difference]: Finished difference. Result has 112 places, 148 transitions, 1173 flow [2023-08-04 09:04:07,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1173, PETRI_PLACES=112, PETRI_TRANSITIONS=148} [2023-08-04 09:04:07,925 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 66 predicate places. [2023-08-04 09:04:07,925 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 148 transitions, 1173 flow [2023-08-04 09:04:07,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 102.64516129032258) internal successors, (3182), 31 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:07,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:07,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 09:04:07,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-04 09:04:08,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 09:04:08,127 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:08,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash 280464017, now seen corresponding path program 2 times [2023-08-04 09:04:08,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:08,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205171403] [2023-08-04 09:04:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:04:08,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:04:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:04:08,301 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:04:08,301 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:04:08,301 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:04:08,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-04 09:04:08,301 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:08,302 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2023-08-04 09:04:08,303 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 09:04:08,303 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 09:04:08,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:04:08 BasicIcfg [2023-08-04 09:04:08,407 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 09:04:08,408 INFO L158 Benchmark]: Toolchain (without parser) took 53496.51ms. Allocated memory was 528.5MB in the beginning and 6.0GB in the end (delta: 5.4GB). Free memory was 483.6MB in the beginning and 4.9GB in the end (delta: -4.4GB). Peak memory consumption was 1.4GB. Max. memory is 16.0GB. [2023-08-04 09:04:08,408 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 364.9MB. Free memory is still 314.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 09:04:08,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.93ms. Allocated memory is still 528.5MB. Free memory was 483.6MB in the beginning and 471.9MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 09:04:08,409 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.42ms. Allocated memory is still 528.5MB. Free memory was 471.8MB in the beginning and 469.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:04:08,409 INFO L158 Benchmark]: Boogie Preprocessor took 34.43ms. Allocated memory is still 528.5MB. Free memory was 469.7MB in the beginning and 468.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:04:08,409 INFO L158 Benchmark]: RCFGBuilder took 494.14ms. Allocated memory is still 528.5MB. Free memory was 467.7MB in the beginning and 440.5MB in the end (delta: 27.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-04 09:04:08,409 INFO L158 Benchmark]: TraceAbstraction took 52750.01ms. Allocated memory was 528.5MB in the beginning and 6.0GB in the end (delta: 5.4GB). Free memory was 439.6MB in the beginning and 4.9GB in the end (delta: -4.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-04 09:04:08,412 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 364.9MB. Free memory is still 314.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 186.93ms. Allocated memory is still 528.5MB. Free memory was 483.6MB in the beginning and 471.9MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.42ms. Allocated memory is still 528.5MB. Free memory was 471.8MB in the beginning and 469.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.43ms. Allocated memory is still 528.5MB. Free memory was 469.7MB in the beginning and 468.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 494.14ms. Allocated memory is still 528.5MB. Free memory was 467.7MB in the beginning and 440.5MB in the end (delta: 27.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 52750.01ms. Allocated memory was 528.5MB in the beginning and 6.0GB in the end (delta: 5.4GB). Free memory was 439.6MB in the beginning and 4.9GB in the end (delta: -4.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 129 PlacesBefore, 32 PlacesAfterwards, 141 TransitionsBefore, 34 TransitionsAfterwards, 2662 CoEnabledTransitionPairs, 7 FixpointIterations, 48 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 14 ConcurrentYvCompositions, 10 ChoiceCompositions, 127 TotalNumberOfCompositions, 4239 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3476, independent: 3412, independent conditional: 0, independent unconditional: 3412, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1424, independent: 1406, independent conditional: 0, independent unconditional: 1406, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3476, independent: 2006, independent conditional: 0, independent unconditional: 2006, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 1424, unknown conditional: 0, unknown unconditional: 1424] , Statistics on independence cache: Total cache size (in pairs): 121, Positive cache size: 116, Positive conditional cache size: 0, Positive unconditional cache size: 116, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 129 PlacesBefore, 32 PlacesAfterwards, 141 TransitionsBefore, 34 TransitionsAfterwards, 2662 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 14 ConcurrentYvCompositions, 10 ChoiceCompositions, 123 TotalNumberOfCompositions, 3933 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3310, independent: 3256, independent conditional: 0, independent unconditional: 3256, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1429, independent: 1411, independent conditional: 0, independent unconditional: 1411, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3310, independent: 1845, independent conditional: 0, independent unconditional: 1845, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 1429, unknown conditional: 0, unknown unconditional: 1429] , Statistics on independence cache: Total cache size (in pairs): 122, Positive cache size: 116, Positive conditional cache size: 0, Positive unconditional cache size: 116, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.3s, 153 PlacesBefore, 46 PlacesAfterwards, 169 TransitionsBefore, 50 TransitionsAfterwards, 6732 CoEnabledTransitionPairs, 7 FixpointIterations, 49 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 18 ConcurrentYvCompositions, 12 ChoiceCompositions, 141 TotalNumberOfCompositions, 12775 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9881, independent: 9772, independent conditional: 0, independent unconditional: 9772, dependent: 109, dependent conditional: 0, dependent unconditional: 109, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3533, independent: 3504, independent conditional: 0, independent unconditional: 3504, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9881, independent: 6268, independent conditional: 0, independent unconditional: 6268, dependent: 80, dependent conditional: 0, dependent unconditional: 80, unknown: 3533, unknown conditional: 0, unknown unconditional: 3533] , Statistics on independence cache: Total cache size (in pairs): 310, Positive cache size: 300, Positive conditional cache size: 0, Positive unconditional cache size: 300, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1[2], t2[2]; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-6:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-6:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] 0 int asdf=0; VAL [A={-6:0}, N=1, asdf=0, counter=0, t1={5:0}, t2={3:0}] [L81] COND TRUE 0 asdf<2 [L81] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [A={-6:0}, N=1, asdf=0, counter=0, pthread_create(&t1[asdf], 0, thread1, 0)=-4, t1={5:0}, t2={3:0}] [L81] 0 asdf++ VAL [A={-6:0}, N=1, asdf=1, counter=0, t1={5:0}, t2={3:0}] [L81] COND TRUE 0 asdf<2 [L81] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [A={-6:0}, N=1, asdf=1, counter=0, pthread_create(&t1[asdf], 0, thread1, 0)=-3, t1={5:0}, t2={3:0}] [L81] 0 asdf++ VAL [A={-6:0}, N=1, asdf=2, counter=0, t1={5:0}, t2={3:0}] [L49] 2 int i=0; VAL [A={-6:0}, N=1, counter=0, i=0] [L49] COND TRUE 2 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 2 !(!cond) [L110] RET 2 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 2 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 2 !(!cond) [L111] RET 2 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 2 return a + b; [L51] RET, EXPR 2 plus(counter, A[i]) [L51] 2 int tmp = plus(counter, A[i]); [L81] COND FALSE 0 !(asdf<2) [L82] 0 int asdf=0; VAL [A={-6:0}, N=1, asdf=0, asdf=2, counter=0, t1={5:0}, t2={3:0}] [L82] COND TRUE 0 asdf<2 [L82] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [A={-6:0}, N=1, asdf=0, asdf=2, counter=0, pthread_create(&t2[asdf], 0, thread2, 0)=-2, t1={5:0}, t2={3:0}] [L82] 0 asdf++ VAL [A={-6:0}, N=1, asdf=1, asdf=2, counter=0, t1={5:0}, t2={3:0}] [L82] COND TRUE 0 asdf<2 [L62] 3 int i=0; VAL [A={-6:0}, N=1, counter=0, i=0] [L62] COND TRUE 3 i= b - 2147483648) [L38] COND FALSE 3 !(!cond) [L104] RET 3 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 3 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 3 !(!cond) [L105] RET 3 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 3 return a - b; [L64] RET, EXPR 3 minus(counter, A[i]) [L64] 3 int tmp = minus(counter, A[i]); [L82] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [A={-6:0}, N=1, asdf=1, asdf=2, counter=0, pthread_create(&t2[asdf], 0, thread2, 0)=-1, t1={5:0}, t2={3:0}] [L82] 0 asdf++ VAL [A={-6:0}, N=1, asdf=2, asdf=2, counter=0, t1={5:0}, t2={3:0}] [L62] 4 int i=0; VAL [A={-6:0}, N=1, counter=0, i=0, tmp=5] [L62] COND TRUE 4 i= b - 2147483648) [L38] COND FALSE 4 !(!cond) [L104] RET 4 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 4 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 4 !(!cond) [L105] RET 4 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 4 return a - b; [L64] RET, EXPR 4 minus(counter, A[i]) [L64] 4 int tmp = minus(counter, A[i]); [L82] COND FALSE 0 !(asdf<2) [L83] 0 int asdf=0; VAL [A={-6:0}, N=1, asdf=0, asdf=2, asdf=2, counter=0, t1={5:0}, t2={3:0}] [L83] COND TRUE 0 asdf<2 [L83] 0 t1[asdf] VAL [A={-6:0}, N=1, asdf=0, asdf=2, asdf=2, counter=0, t1={5:0}, t1[asdf]=-4, t2={3:0}] [L49] 1 int i=0; VAL [A={-6:0}, N=1, counter=0, i=0, tmp=-5] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L54] 1 counter = tmp [L49] 1 i++ VAL [A={-6:0}, N=1, counter=-5, i=1, tmp=-5] [L49] COND FALSE 1 !(i