/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-threaded-sum-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:45:14,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:45:14,757 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:45:14,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:45:14,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:45:14,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:45:14,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:45:14,780 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:45:14,781 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:45:14,781 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:45:14,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:45:14,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:45:14,783 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:45:14,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:45:14,783 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:45:14,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:45:14,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:45:14,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:45:14,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:45:14,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:45:14,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:45:14,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:45:14,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:45:14,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:45:14,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:45:14,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:45:14,787 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:45:14,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:45:14,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:45:14,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:45:14,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:45:14,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:45:14,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:45:14,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:45:14,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:45:14,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:45:14,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:45:14,790 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:45:14,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:45:14,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:45:14,791 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:45:14,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:45:15,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:45:15,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:45:15,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:45:15,070 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:45:15,070 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:45:15,071 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-threaded-sum-3.wvr_bound2.c [2023-08-04 09:45:16,194 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:45:16,398 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:45:16,399 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-threaded-sum-3.wvr_bound2.c [2023-08-04 09:45:16,407 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72965137a/71e80a9ac0d843b497b3e750d7dc4e55/FLAG0f97e96e4 [2023-08-04 09:45:16,428 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72965137a/71e80a9ac0d843b497b3e750d7dc4e55 [2023-08-04 09:45:16,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:45:16,436 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:45:16,438 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:45:16,438 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:45:16,441 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:45:16,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe9656c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16, skipping insertion in model container [2023-08-04 09:45:16,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,470 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:45:16,600 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-threaded-sum-3.wvr_bound2.c[3200,3213] [2023-08-04 09:45:16,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:45:16,609 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:45:16,633 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-threaded-sum-3.wvr_bound2.c[3200,3213] [2023-08-04 09:45:16,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:45:16,641 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:45:16,641 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:45:16,647 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:45:16,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16 WrapperNode [2023-08-04 09:45:16,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:45:16,648 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:45:16,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:45:16,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:45:16,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,663 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,682 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 130 [2023-08-04 09:45:16,682 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:45:16,683 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:45:16,683 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:45:16,683 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:45:16,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,700 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,704 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,706 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,707 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:45:16,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:45:16,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:45:16,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:45:16,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (1/1) ... [2023-08-04 09:45:16,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:45:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:16,747 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 09:45:16,758 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 09:45:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:45:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:45:16,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:45:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:45:16,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:45:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:45:16,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:45:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:45:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:45:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:45:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:45:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:45:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:45:16,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:45:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:45:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:45:16,781 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 09:45:16,860 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:45:16,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:45:17,092 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:45:17,148 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:45:17,149 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 09:45:17,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:45:17 BoogieIcfgContainer [2023-08-04 09:45:17,151 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:45:17,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:45:17,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:45:17,156 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:45:17,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:45:16" (1/3) ... [2023-08-04 09:45:17,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62aaa396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:45:17, skipping insertion in model container [2023-08-04 09:45:17,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:45:16" (2/3) ... [2023-08-04 09:45:17,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62aaa396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:45:17, skipping insertion in model container [2023-08-04 09:45:17,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:45:17" (3/3) ... [2023-08-04 09:45:17,159 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-threaded-sum-3.wvr_bound2.c [2023-08-04 09:45:17,166 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:45:17,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:45:17,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:45:17,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:45:17,264 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:45:17,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:17,489 INFO L124 PetriNetUnfolderBase]: 97/622 cut-off events. [2023-08-04 09:45:17,489 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:45:17,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 622 events. 97/622 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3127 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-04 09:45:17,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:17,512 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:17,514 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:45:17,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:17,525 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:17,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:17,611 INFO L124 PetriNetUnfolderBase]: 97/622 cut-off events. [2023-08-04 09:45:17,612 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:45:17,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 622 events. 97/622 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3127 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-04 09:45:17,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 4238 [2023-08-04 09:45:20,974 INFO L134 LiptonReduction]: Checked pairs total: 9874 [2023-08-04 09:45:20,974 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-04 09:45:20,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:45:20,993 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;@46bd601a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:45:20,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:45:20,997 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:45:20,998 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-08-04 09:45:20,998 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:45:20,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:20,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:20,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:21,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash -418489710, now seen corresponding path program 1 times [2023-08-04 09:45:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:21,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448300932] [2023-08-04 09:45:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:21,192 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 09:45:21,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:21,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448300932] [2023-08-04 09:45:21,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448300932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:21,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:45:21,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:45:21,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288781617] [2023-08-04 09:45:21,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:21,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:21,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:45:21,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 284 [2023-08-04 09:45:21,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:21,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:21,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 284 [2023-08-04 09:45:21,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:21,556 INFO L124 PetriNetUnfolderBase]: 1813/2897 cut-off events. [2023-08-04 09:45:21,556 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-08-04 09:45:21,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5851 conditions, 2897 events. 1813/2897 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17318 event pairs, 877 based on Foata normal form. 0/1795 useless extension candidates. Maximal degree in co-relation 4555. Up to 2697 conditions per place. [2023-08-04 09:45:21,578 INFO L140 encePairwiseOnDemand]: 280/284 looper letters, 39 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 09:45:21,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 228 flow [2023-08-04 09:45:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:45:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:45:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-04 09:45:21,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49765258215962443 [2023-08-04 09:45:21,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-04 09:45:21,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-04 09:45:21,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:21,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-04 09:45:21,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 09:45:21,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:21,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:21,606 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 142 flow. Second operand 3 states and 424 transitions. [2023-08-04 09:45:21,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 228 flow [2023-08-04 09:45:21,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:45:21,612 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 148 flow [2023-08-04 09:45:21,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2023-08-04 09:45:21,616 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-04 09:45:21,616 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 148 flow [2023-08-04 09:45:21,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:21,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:21,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:21,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:45:21,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:21,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1014880768, now seen corresponding path program 1 times [2023-08-04 09:45:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:21,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173465307] [2023-08-04 09:45:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:21,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:21,736 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 09:45:21,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:21,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173465307] [2023-08-04 09:45:21,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173465307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:45:21,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340327106] [2023-08-04 09:45:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:21,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:21,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:21,743 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 09:45:21,745 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 09:45:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:21,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:45:21,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:45:21,841 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 09:45:21,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:45:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340327106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:21,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:45:21,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:45:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733807332] [2023-08-04 09:45:21,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:21,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:21,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:21,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:21,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:45:21,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 284 [2023-08-04 09:45:21,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:21,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:21,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 284 [2023-08-04 09:45:21,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:22,162 INFO L124 PetriNetUnfolderBase]: 1742/2772 cut-off events. [2023-08-04 09:45:22,163 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2023-08-04 09:45:22,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5613 conditions, 2772 events. 1742/2772 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16396 event pairs, 871 based on Foata normal form. 0/1721 useless extension candidates. Maximal degree in co-relation 4314. Up to 2567 conditions per place. [2023-08-04 09:45:22,213 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 41 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 09:45:22,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 244 flow [2023-08-04 09:45:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:45:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:45:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-04 09:45:22,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988262910798122 [2023-08-04 09:45:22,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-04 09:45:22,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-04 09:45:22,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:22,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-04 09:45:22,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,222 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 148 flow. Second operand 3 states and 425 transitions. [2023-08-04 09:45:22,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 244 flow [2023-08-04 09:45:22,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:45:22,225 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 152 flow [2023-08-04 09:45:22,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2023-08-04 09:45:22,226 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-04 09:45:22,227 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 152 flow [2023-08-04 09:45:22,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:22,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:22,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:45:22,433 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 09:45:22,433 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:22,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:22,434 INFO L85 PathProgramCache]: Analyzing trace with hash -675242256, now seen corresponding path program 1 times [2023-08-04 09:45:22,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:22,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458774360] [2023-08-04 09:45:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:22,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:22,512 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 09:45:22,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458774360] [2023-08-04 09:45:22,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458774360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:45:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118486632] [2023-08-04 09:45:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:22,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:22,516 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 09:45:22,518 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 09:45:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:22,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:45:22,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:45:22,609 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 09:45:22,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:45:22,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118486632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:22,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:45:22,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:45:22,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632397895] [2023-08-04 09:45:22,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:22,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:22,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:45:22,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 284 [2023-08-04 09:45:22,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:22,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 284 [2023-08-04 09:45:22,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:22,930 INFO L124 PetriNetUnfolderBase]: 1733/2752 cut-off events. [2023-08-04 09:45:22,930 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-08-04 09:45:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5593 conditions, 2752 events. 1733/2752 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15427 event pairs, 1228 based on Foata normal form. 0/1736 useless extension candidates. Maximal degree in co-relation 4290. Up to 2469 conditions per place. [2023-08-04 09:45:22,954 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 44 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 09:45:22,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 260 flow [2023-08-04 09:45:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:45:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:45:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-04 09:45:22,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023474178403756 [2023-08-04 09:45:22,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-04 09:45:22,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-04 09:45:22,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:22,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-04 09:45:22,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,970 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 152 flow. Second operand 3 states and 428 transitions. [2023-08-04 09:45:22,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 260 flow [2023-08-04 09:45:22,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:45:22,974 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 156 flow [2023-08-04 09:45:22,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-04 09:45:22,975 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-04 09:45:22,975 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 156 flow [2023-08-04 09:45:22,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:22,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:22,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:22,984 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 09:45:23,181 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 09:45:23,182 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:23,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash -339803025, now seen corresponding path program 1 times [2023-08-04 09:45:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:23,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458260285] [2023-08-04 09:45:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:23,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:23,267 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 09:45:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458260285] [2023-08-04 09:45:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458260285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:45:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575516409] [2023-08-04 09:45:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:23,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:23,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:23,270 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 09:45:23,288 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 09:45:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:23,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:45:23,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:45:23,364 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 09:45:23,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:45:23,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575516409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:23,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:45:23,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:45:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616195531] [2023-08-04 09:45:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:23,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:45:23,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 284 [2023-08-04 09:45:23,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:23,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:23,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 284 [2023-08-04 09:45:23,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:23,571 INFO L124 PetriNetUnfolderBase]: 1086/1811 cut-off events. [2023-08-04 09:45:23,572 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-04 09:45:23,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3799 conditions, 1811 events. 1086/1811 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9839 event pairs, 632 based on Foata normal form. 0/1189 useless extension candidates. Maximal degree in co-relation 2731. Up to 1341 conditions per place. [2023-08-04 09:45:23,585 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 48 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 09:45:23,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 289 flow [2023-08-04 09:45:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:45:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:45:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-04 09:45:23,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070422535211268 [2023-08-04 09:45:23,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-04 09:45:23,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-04 09:45:23,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:23,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-04 09:45:23,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:23,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:23,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:23,591 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 156 flow. Second operand 3 states and 432 transitions. [2023-08-04 09:45:23,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 289 flow [2023-08-04 09:45:23,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:45:23,594 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 164 flow [2023-08-04 09:45:23,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-04 09:45:23,595 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-08-04 09:45:23,595 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 164 flow [2023-08-04 09:45:23,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:23,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:23,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:23,608 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 09:45:23,807 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 09:45:23,808 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:23,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1634500029, now seen corresponding path program 1 times [2023-08-04 09:45:23,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:23,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920598367] [2023-08-04 09:45:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:23,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:45:23,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:23,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920598367] [2023-08-04 09:45:23,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920598367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:45:23,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406669801] [2023-08-04 09:45:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:23,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:23,870 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 09:45:23,872 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 09:45:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:23,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:45:23,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:45:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:45:23,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:45:23,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406669801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:23,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:45:23,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:45:23,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002582857] [2023-08-04 09:45:23,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:23,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:23,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:23,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:45:23,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 284 [2023-08-04 09:45:23,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:23,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:23,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 284 [2023-08-04 09:45:23,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:24,151 INFO L124 PetriNetUnfolderBase]: 893/1523 cut-off events. [2023-08-04 09:45:24,151 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2023-08-04 09:45:24,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3337 conditions, 1523 events. 893/1523 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8032 event pairs, 595 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 2447. Up to 1157 conditions per place. [2023-08-04 09:45:24,162 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 49 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 09:45:24,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 299 flow [2023-08-04 09:45:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:45:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:45:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-04 09:45:24,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070422535211268 [2023-08-04 09:45:24,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-04 09:45:24,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-04 09:45:24,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:24,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-04 09:45:24,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,167 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 164 flow. Second operand 3 states and 432 transitions. [2023-08-04 09:45:24,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 299 flow [2023-08-04 09:45:24,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:45:24,172 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 174 flow [2023-08-04 09:45:24,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=49, 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=174, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-04 09:45:24,173 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2023-08-04 09:45:24,173 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 174 flow [2023-08-04 09:45:24,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:24,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:24,180 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 09:45:24,379 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 09:45:24,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:24,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:24,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1712076357, now seen corresponding path program 1 times [2023-08-04 09:45:24,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:24,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872541887] [2023-08-04 09:45:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:24,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:45:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:24,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872541887] [2023-08-04 09:45:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872541887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:45:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368596487] [2023-08-04 09:45:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:24,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:24,449 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 09:45:24,451 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 09:45:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:24,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:45:24,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:45:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:45:24,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:45:24,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368596487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:24,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:45:24,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:45:24,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638489064] [2023-08-04 09:45:24,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:24,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:24,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:24,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:24,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:45:24,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 284 [2023-08-04 09:45:24,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:24,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 284 [2023-08-04 09:45:24,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:24,692 INFO L124 PetriNetUnfolderBase]: 883/1505 cut-off events. [2023-08-04 09:45:24,692 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2023-08-04 09:45:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3347 conditions, 1505 events. 883/1505 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7877 event pairs, 688 based on Foata normal form. 0/1092 useless extension candidates. Maximal degree in co-relation 2484. Up to 1350 conditions per place. [2023-08-04 09:45:24,737 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 44 selfloop transitions, 2 changer transitions 2/59 dead transitions. [2023-08-04 09:45:24,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 286 flow [2023-08-04 09:45:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:45:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:45:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-04 09:45:24,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023474178403756 [2023-08-04 09:45:24,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-04 09:45:24,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-04 09:45:24,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:24,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-04 09:45:24,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,745 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 174 flow. Second operand 3 states and 428 transitions. [2023-08-04 09:45:24,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 286 flow [2023-08-04 09:45:24,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:45:24,749 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 176 flow [2023-08-04 09:45:24,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-04 09:45:24,750 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2023-08-04 09:45:24,750 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 176 flow [2023-08-04 09:45:24,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:24,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:24,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:24,759 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 09:45:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:24,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:24,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1233288198, now seen corresponding path program 1 times [2023-08-04 09:45:24,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:24,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502589325] [2023-08-04 09:45:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:24,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:45:25,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:25,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502589325] [2023-08-04 09:45:25,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502589325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:45:25,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117163185] [2023-08-04 09:45:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:25,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:25,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:25,045 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 09:45:25,059 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 09:45:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:25,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:45:25,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:45:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:45:25,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:45:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:45:25,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117163185] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:45:25,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:45:25,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:45:25,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689959226] [2023-08-04 09:45:25,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:45:25,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:45:25,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:25,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:45:25,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:45:25,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 284 [2023-08-04 09:45:25,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:25,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:25,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 284 [2023-08-04 09:45:25,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:25,247 INFO L124 PetriNetUnfolderBase]: 5/20 cut-off events. [2023-08-04 09:45:25,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:45:25,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 20 events. 5/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 36 event pairs, 0 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 43. Up to 10 conditions per place. [2023-08-04 09:45:25,247 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-04 09:45:25,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 12 transitions, 49 flow [2023-08-04 09:45:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:45:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:45:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2023-08-04 09:45:25,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524647887323944 [2023-08-04 09:45:25,249 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2023-08-04 09:45:25,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2023-08-04 09:45:25,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:25,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2023-08-04 09:45:25,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:25,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:25,255 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:25,255 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 176 flow. Second operand 4 states and 514 transitions. [2023-08-04 09:45:25,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 12 transitions, 49 flow [2023-08-04 09:45:25,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 12 transitions, 47 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:45:25,255 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:45:25,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 09:45:25,256 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -23 predicate places. [2023-08-04 09:45:25,256 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:45:25,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:25,259 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:45:25,268 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 09:45:25,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:25,465 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:25,466 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:45:25,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:25,509 INFO L124 PetriNetUnfolderBase]: 97/622 cut-off events. [2023-08-04 09:45:25,509 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:45:25,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 622 events. 97/622 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3127 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-04 09:45:25,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:25,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:25,514 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:45:25,514 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:25,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:25,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 09:45:25,552 INFO L124 PetriNetUnfolderBase]: 97/622 cut-off events. [2023-08-04 09:45:25,552 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:45:25,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 622 events. 97/622 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3127 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-04 09:45:25,561 INFO L119 LiptonReduction]: Number of co-enabled transitions 4238 [2023-08-04 09:45:28,439 INFO L134 LiptonReduction]: Checked pairs total: 9156 [2023-08-04 09:45:28,440 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-04 09:45:28,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:45:28,443 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;@46bd601a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:45:28,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:45:28,446 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:45:28,446 INFO L124 PetriNetUnfolderBase]: 2/32 cut-off events. [2023-08-04 09:45:28,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:45:28,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:28,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:45:28,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:45:28,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:28,447 INFO L85 PathProgramCache]: Analyzing trace with hash 806671437, now seen corresponding path program 1 times [2023-08-04 09:45:28,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:28,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926447267] [2023-08-04 09:45:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:28,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:45:28,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:45:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:45:28,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:45:28,502 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:45:28,502 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:45:28,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:45:28,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:45:28,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:45:28,503 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:45:28,503 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:45:28,504 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:45:28,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:45:28,526 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:45:28,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 09:45:28,940 INFO L124 PetriNetUnfolderBase]: 887/4087 cut-off events. [2023-08-04 09:45:28,941 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:45:28,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4761 conditions, 4087 events. 887/4087 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 32776 event pairs, 22 based on Foata normal form. 0/3444 useless extension candidates. Maximal degree in co-relation 2413. Up to 192 conditions per place. [2023-08-04 09:45:28,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 09:45:28,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 196 transitions, 482 flow [2023-08-04 09:45:28,978 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:45:28,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 196 transitions, 482 flow [2023-08-04 09:45:28,978 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 196 transitions, 482 flow [2023-08-04 09:45:28,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 09:45:29,337 INFO L124 PetriNetUnfolderBase]: 887/4087 cut-off events. [2023-08-04 09:45:29,338 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:45:29,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4761 conditions, 4087 events. 887/4087 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 32776 event pairs, 22 based on Foata normal form. 0/3444 useless extension candidates. Maximal degree in co-relation 2413. Up to 192 conditions per place. [2023-08-04 09:45:29,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 10772 [2023-08-04 09:45:32,487 INFO L134 LiptonReduction]: Checked pairs total: 31179 [2023-08-04 09:45:32,487 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-04 09:45:32,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:45:32,489 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;@46bd601a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:45:32,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:45:32,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:45:32,491 INFO L124 PetriNetUnfolderBase]: 2/31 cut-off events. [2023-08-04 09:45:32,492 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:45:32,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:32,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:32,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:32,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 413694079, now seen corresponding path program 1 times [2023-08-04 09:45:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:32,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399085533] [2023-08-04 09:45:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:32,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:32,513 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 09:45:32,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:32,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399085533] [2023-08-04 09:45:32,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399085533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:32,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:45:32,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:45:32,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267679766] [2023-08-04 09:45:32,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:32,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:32,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:45:32,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 332 [2023-08-04 09:45:32,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 79 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:32,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:32,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 332 [2023-08-04 09:45:32,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:46:05,017 INFO L124 PetriNetUnfolderBase]: 404692/504242 cut-off events. [2023-08-04 09:46:05,017 INFO L125 PetriNetUnfolderBase]: For 56460/56460 co-relation queries the response was YES. [2023-08-04 09:46:06,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008735 conditions, 504242 events. 404692/504242 cut-off events. For 56460/56460 co-relation queries the response was YES. Maximal size of possible extension queue 10817. Compared 2945062 event pairs, 186088 based on Foata normal form. 0/303217 useless extension candidates. Maximal degree in co-relation 354059. Up to 474524 conditions per place. [2023-08-04 09:46:08,984 INFO L140 encePairwiseOnDemand]: 328/332 looper letters, 59 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 09:46:08,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 376 flow [2023-08-04 09:46:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:46:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:46:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-04 09:46:08,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-04 09:46:08,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-04 09:46:08,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-04 09:46:08,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:46:08,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-04 09:46:08,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:08,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:08,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:08,988 INFO L175 Difference]: Start difference. First operand has 68 places, 79 transitions, 248 flow. Second operand 3 states and 498 transitions. [2023-08-04 09:46:08,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 376 flow [2023-08-04 09:46:09,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:46:09,047 INFO L231 Difference]: Finished difference. Result has 70 places, 79 transitions, 258 flow [2023-08-04 09:46:09,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=70, PETRI_TRANSITIONS=79} [2023-08-04 09:46:09,047 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 09:46:09,048 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 79 transitions, 258 flow [2023-08-04 09:46:09,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:09,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:46:09,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:46:09,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:46:09,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:46:09,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:46:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2086389952, now seen corresponding path program 1 times [2023-08-04 09:46:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:46:09,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171258449] [2023-08-04 09:46:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:46:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:09,077 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 09:46:09,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:46:09,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171258449] [2023-08-04 09:46:09,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171258449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:46:09,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990523927] [2023-08-04 09:46:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:09,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:46:09,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:46:09,079 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 09:46:09,082 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 09:46:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:09,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:46:09,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:46:09,151 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 09:46:09,151 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:46:09,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990523927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:46:09,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:46:09,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:46:09,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299743360] [2023-08-04 09:46:09,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:46:09,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:46:09,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:46:09,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:46:09,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:46:09,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 332 [2023-08-04 09:46:09,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 79 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:09,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:46:09,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 332 [2023-08-04 09:46:09,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:46:40,083 INFO L124 PetriNetUnfolderBase]: 401720/498858 cut-off events. [2023-08-04 09:46:40,084 INFO L125 PetriNetUnfolderBase]: For 57870/57870 co-relation queries the response was YES. [2023-08-04 09:46:41,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 999719 conditions, 498858 events. 401720/498858 cut-off events. For 57870/57870 co-relation queries the response was YES. Maximal size of possible extension queue 11128. Compared 2904218 event pairs, 185064 based on Foata normal form. 0/299352 useless extension candidates. Maximal degree in co-relation 999682. Up to 470355 conditions per place. [2023-08-04 09:46:43,852 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 64 selfloop transitions, 2 changer transitions 1/87 dead transitions. [2023-08-04 09:46:43,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 406 flow [2023-08-04 09:46:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:46:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:46:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-04 09:46:43,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030120481927711 [2023-08-04 09:46:43,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-04 09:46:43,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-04 09:46:43,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:46:43,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-04 09:46:43,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:43,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:43,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:43,858 INFO L175 Difference]: Start difference. First operand has 70 places, 79 transitions, 258 flow. Second operand 3 states and 501 transitions. [2023-08-04 09:46:43,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 406 flow [2023-08-04 09:46:43,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 404 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:46:43,885 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 262 flow [2023-08-04 09:46:43,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-04 09:46:43,886 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 09:46:43,886 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 262 flow [2023-08-04 09:46:43,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:43,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:46:43,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:46:43,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:46:44,090 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 09:46:44,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:46:44,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:46:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -435575706, now seen corresponding path program 1 times [2023-08-04 09:46:44,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:46:44,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098167853] [2023-08-04 09:46:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:44,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:46:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:44,168 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 09:46:44,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:46:44,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098167853] [2023-08-04 09:46:44,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098167853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:46:44,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955826999] [2023-08-04 09:46:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:44,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:46:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:46:44,170 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 09:46:44,172 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 09:46:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:44,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:46:44,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:46:44,249 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 09:46:44,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:46:44,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955826999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:46:44,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:46:44,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:46:44,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652418287] [2023-08-04 09:46:44,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:46:44,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:46:44,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:46:44,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:46:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:46:44,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 332 [2023-08-04 09:46:44,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:44,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:46:44,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 332 [2023-08-04 09:46:44,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:18,179 INFO L124 PetriNetUnfolderBase]: 409434/506805 cut-off events. [2023-08-04 09:47:18,180 INFO L125 PetriNetUnfolderBase]: For 47495/47495 co-relation queries the response was YES. [2023-08-04 09:47:19,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015642 conditions, 506805 events. 409434/506805 cut-off events. For 47495/47495 co-relation queries the response was YES. Maximal size of possible extension queue 11642. Compared 2978300 event pairs, 177322 based on Foata normal form. 0/303302 useless extension candidates. Maximal degree in co-relation 347713. Up to 473307 conditions per place. [2023-08-04 09:47:21,856 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 70 selfloop transitions, 2 changer transitions 1/92 dead transitions. [2023-08-04 09:47:21,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 432 flow [2023-08-04 09:47:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-04 09:47:21,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080321285140562 [2023-08-04 09:47:21,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-04 09:47:21,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-04 09:47:21,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:21,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-04 09:47:21,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:21,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:21,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:21,862 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 262 flow. Second operand 3 states and 506 transitions. [2023-08-04 09:47:21,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 432 flow [2023-08-04 09:47:21,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:47:21,899 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 262 flow [2023-08-04 09:47:21,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-04 09:47:21,900 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 09:47:21,900 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 262 flow [2023-08-04 09:47:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:21,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:21,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:21,907 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 09:47:22,105 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 09:47:22,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:22,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:22,105 INFO L85 PathProgramCache]: Analyzing trace with hash 708190570, now seen corresponding path program 1 times [2023-08-04 09:47:22,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226906016] [2023-08-04 09:47:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:22,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:22,143 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 09:47:22,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226906016] [2023-08-04 09:47:22,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226906016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360152764] [2023-08-04 09:47:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:22,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:22,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:22,145 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 09:47:22,153 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 09:47:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:22,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:47:22,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:22,226 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 09:47:22,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:22,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360152764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:22,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:22,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:47:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798871262] [2023-08-04 09:47:22,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:22,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:22,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 332 [2023-08-04 09:47:22,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:22,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:22,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 332 [2023-08-04 09:47:22,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:50,232 INFO L124 PetriNetUnfolderBase]: 379988/460506 cut-off events. [2023-08-04 09:47:50,232 INFO L125 PetriNetUnfolderBase]: For 28471/28471 co-relation queries the response was YES. [2023-08-04 09:47:51,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937651 conditions, 460506 events. 379988/460506 cut-off events. For 28471/28471 co-relation queries the response was YES. Maximal size of possible extension queue 9404. Compared 2469117 event pairs, 157404 based on Foata normal form. 0/275999 useless extension candidates. Maximal degree in co-relation 347665. Up to 367789 conditions per place. [2023-08-04 09:47:53,716 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 80 selfloop transitions, 2 changer transitions 1/101 dead transitions. [2023-08-04 09:47:53,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 487 flow [2023-08-04 09:47:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 09:47:53,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170682730923695 [2023-08-04 09:47:53,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 09:47:53,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 09:47:53,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:53,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 09:47:53,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:53,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:53,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:53,722 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 262 flow. Second operand 3 states and 515 transitions. [2023-08-04 09:47:53,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 487 flow [2023-08-04 09:47:53,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:47:53,767 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 262 flow [2023-08-04 09:47:53,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-04 09:47:53,769 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 09:47:53,769 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 262 flow [2023-08-04 09:47:53,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:53,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:53,770 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] [2023-08-04 09:47:53,778 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 09:47:53,976 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 09:47:53,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:53,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2024753225, now seen corresponding path program 1 times [2023-08-04 09:47:53,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:53,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489626341] [2023-08-04 09:47:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:53,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:54,020 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 09:47:54,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:54,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489626341] [2023-08-04 09:47:54,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489626341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:54,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981829702] [2023-08-04 09:47:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:54,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:54,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:54,022 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 09:47:54,033 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 09:47:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:54,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:47:54,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:47:54,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:54,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981829702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:54,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:54,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:47:54,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15227792] [2023-08-04 09:47:54,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:54,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:54,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:54,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 332 [2023-08-04 09:47:54,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:54,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:54,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 332 [2023-08-04 09:47:54,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:48:23,088 INFO L124 PetriNetUnfolderBase]: 349500/427243 cut-off events. [2023-08-04 09:48:23,088 INFO L125 PetriNetUnfolderBase]: For 46871/46871 co-relation queries the response was YES. [2023-08-04 09:48:24,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888083 conditions, 427243 events. 349500/427243 cut-off events. For 46871/46871 co-relation queries the response was YES. Maximal size of possible extension queue 7753. Compared 2320516 event pairs, 143070 based on Foata normal form. 0/264440 useless extension candidates. Maximal degree in co-relation 348291. Up to 323525 conditions per place. [2023-08-04 09:48:26,400 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 81 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-04 09:48:26,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 488 flow [2023-08-04 09:48:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:48:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:48:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 09:48:26,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170682730923695 [2023-08-04 09:48:26,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 09:48:26,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 09:48:26,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:48:26,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 09:48:26,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:26,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:26,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:26,406 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 262 flow. Second operand 3 states and 515 transitions. [2023-08-04 09:48:26,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 488 flow [2023-08-04 09:48:26,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 481 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:48:26,806 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 268 flow [2023-08-04 09:48:26,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2023-08-04 09:48:26,806 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 09:48:26,807 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 268 flow [2023-08-04 09:48:26,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:26,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:48:26,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:48:26,816 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 09:48:27,011 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 09:48:27,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:48:27,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:48:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1049350951, now seen corresponding path program 1 times [2023-08-04 09:48:27,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:48:27,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480841934] [2023-08-04 09:48:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:48:27,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:48:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:48:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:48:27,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:48:27,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480841934] [2023-08-04 09:48:27,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480841934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:48:27,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322512741] [2023-08-04 09:48:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:48:27,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:48:27,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:48:27,058 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 09:48:27,063 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 09:48:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:48:27,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:48:27,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:48:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:48:27,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:48:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322512741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:48:27,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:48:27,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:48:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714279547] [2023-08-04 09:48:27,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:48:27,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:48:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:48:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:48:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:48:27,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 332 [2023-08-04 09:48:27,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 268 flow. Second operand has 3 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 09:48:27,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:48:27,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 332 [2023-08-04 09:48:27,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:48:54,046 INFO L124 PetriNetUnfolderBase]: 347013/425159 cut-off events. [2023-08-04 09:48:54,046 INFO L125 PetriNetUnfolderBase]: For 47081/47081 co-relation queries the response was YES. [2023-08-04 09:48:55,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893906 conditions, 425159 events. 347013/425159 cut-off events. For 47081/47081 co-relation queries the response was YES. Maximal size of possible extension queue 7531. Compared 2315981 event pairs, 164315 based on Foata normal form. 0/267993 useless extension candidates. Maximal degree in co-relation 505416. Up to 370052 conditions per place. [2023-08-04 09:48:56,960 INFO L140 encePairwiseOnDemand]: 329/332 looper letters, 82 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2023-08-04 09:48:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 495 flow [2023-08-04 09:48:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:48:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:48:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 09:48:56,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170682730923695 [2023-08-04 09:48:56,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 09:48:56,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 09:48:56,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:48:56,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 09:48:56,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:56,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:56,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:56,966 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 268 flow. Second operand 3 states and 515 transitions. [2023-08-04 09:48:56,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 495 flow [2023-08-04 09:49:07,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:49:07,135 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 278 flow [2023-08-04 09:49:07,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-08-04 09:49:07,136 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-08-04 09:49:07,136 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 278 flow [2023-08-04 09:49:07,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:49:07,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:49:07,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:07,141 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 09:49:07,337 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 09:49:07,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:07,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash 813356015, now seen corresponding path program 1 times [2023-08-04 09:49:07,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:07,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737316416] [2023-08-04 09:49:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:07,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:49:07,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:07,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737316416] [2023-08-04 09:49:07,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737316416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:07,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510792797] [2023-08-04 09:49:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:07,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:07,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:07,425 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 09:49:07,428 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 09:49:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:07,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:49:07,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:49:07,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:49:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510792797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:07,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:07,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:49:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562836374] [2023-08-04 09:49:07,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:07,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:49:07,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:07,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:49:07,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:07,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 332 [2023-08-04 09:49:07,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 278 flow. Second operand has 5 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 09:49:07,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:07,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 332 [2023-08-04 09:49:07,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand