/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_bench-exp2x3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:08:24,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:08:24,467 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:08:24,472 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:08:24,472 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:08:24,473 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:08:24,473 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:08:24,500 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:08:24,502 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:08:24,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:08:24,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:08:24,506 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:08:24,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:08:24,508 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:08:24,508 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:08:24,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:08:24,509 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:08:24,509 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:08:24,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:08:24,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:08:24,509 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:08:24,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:08:24,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:08:24,510 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:08:24,510 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:08:24,511 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:08:24,511 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:08:24,511 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:08:24,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:08:24,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:08:24,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:08:24,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:08:24,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:08:24,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:08:24,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:08:24,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:08:24,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:08:24,514 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:08:24,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:08:24,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:08:24,514 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:08:24,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:08:24,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:08:24,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:08:24,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:08:24,776 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:08:24,777 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:08:24,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_bench-exp2x3.wvr_bound2.c [2023-08-04 08:08:25,985 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:08:26,191 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:08:26,191 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_bench-exp2x3.wvr_bound2.c [2023-08-04 08:08:26,199 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ab010ad4/963f9f4fc81e41c887bf97936892b3f7/FLAG08c03e6ca [2023-08-04 08:08:26,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ab010ad4/963f9f4fc81e41c887bf97936892b3f7 [2023-08-04 08:08:26,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:08:26,213 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:08:26,215 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:08:26,216 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:08:26,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:08:26,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,225 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e6d474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26, skipping insertion in model container [2023-08-04 08:08:26,225 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,246 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:08:26,412 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_bench-exp2x3.wvr_bound2.c[2561,2574] [2023-08-04 08:08:26,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:08:26,422 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:08:26,443 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_bench-exp2x3.wvr_bound2.c[2561,2574] [2023-08-04 08:08:26,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:08:26,457 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:08:26,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26 WrapperNode [2023-08-04 08:08:26,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:08:26,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:08:26,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:08:26,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:08:26,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,472 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,495 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 160 [2023-08-04 08:08:26,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:08:26,496 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:08:26,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:08:26,496 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:08:26,504 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,524 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,534 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:08:26,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:08:26,535 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:08:26,535 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:08:26,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (1/1) ... [2023-08-04 08:08:26,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:08:26,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:26,570 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 08:08:26,583 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 08:08:26,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:08:26,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:08:26,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:08:26,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:08:26,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:08:26,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:08:26,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:08:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 08:08:26,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 08:08:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:08:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:08:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:08:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:08:26,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:08:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:08:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:08:26,615 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 08:08:26,732 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:08:26,735 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:08:27,091 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:08:27,099 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:08:27,100 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:08:27,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:08:27 BoogieIcfgContainer [2023-08-04 08:08:27,102 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:08:27,106 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:08:27,106 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:08:27,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:08:27,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:08:26" (1/3) ... [2023-08-04 08:08:27,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce6c1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:08:27, skipping insertion in model container [2023-08-04 08:08:27,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:08:26" (2/3) ... [2023-08-04 08:08:27,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce6c1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:08:27, skipping insertion in model container [2023-08-04 08:08:27,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:08:27" (3/3) ... [2023-08-04 08:08:27,113 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_bench-exp2x3.wvr_bound2.c [2023-08-04 08:08:27,121 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:08:27,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:08:27,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:08:27,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:08:27,213 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 08:08:27,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:27,529 INFO L124 PetriNetUnfolderBase]: 269/1437 cut-off events. [2023-08-04 08:08:27,530 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:08:27,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 1437 events. 269/1437 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9424 event pairs, 0 based on Foata normal form. 0/1186 useless extension candidates. Maximal degree in co-relation 798. Up to 33 conditions per place. [2023-08-04 08:08:27,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:27,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:27,563 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:08:27,575 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:27,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:27,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:27,726 INFO L124 PetriNetUnfolderBase]: 269/1437 cut-off events. [2023-08-04 08:08:27,727 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:08:27,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 1437 events. 269/1437 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9424 event pairs, 0 based on Foata normal form. 0/1186 useless extension candidates. Maximal degree in co-relation 798. Up to 33 conditions per place. [2023-08-04 08:08:27,752 INFO L119 LiptonReduction]: Number of co-enabled transitions 5280 [2023-08-04 08:08:31,574 INFO L134 LiptonReduction]: Checked pairs total: 12402 [2023-08-04 08:08:31,575 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-04 08:08:31,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:08:31,593 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;@52e895f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:08:31,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:08:31,601 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:08:31,601 INFO L124 PetriNetUnfolderBase]: 7/63 cut-off events. [2023-08-04 08:08:31,601 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:08:31,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:31,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:31,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:31,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1247821898, now seen corresponding path program 1 times [2023-08-04 08:08:31,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:31,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912078871] [2023-08-04 08:08:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:31,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:31,834 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 08:08:31,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:31,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912078871] [2023-08-04 08:08:31,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912078871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:31,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:08:31,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:08:31,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897741970] [2023-08-04 08:08:31,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:31,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:31,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:31,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:08:31,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 338 [2023-08-04 08:08:31,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 62 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:31,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:31,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 338 [2023-08-04 08:08:31,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:32,343 INFO L124 PetriNetUnfolderBase]: 3524/5035 cut-off events. [2023-08-04 08:08:32,344 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 08:08:32,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10302 conditions, 5035 events. 3524/5035 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21907 event pairs, 1121 based on Foata normal form. 0/3058 useless extension candidates. Maximal degree in co-relation 7476. Up to 4725 conditions per place. [2023-08-04 08:08:32,375 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 53 selfloop transitions, 2 changer transitions 5/64 dead transitions. [2023-08-04 08:08:32,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 308 flow [2023-08-04 08:08:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:08:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:08:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-04 08:08:32,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069033530571992 [2023-08-04 08:08:32,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-04 08:08:32,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-04 08:08:32,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:32,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-04 08:08:32,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 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 08:08:32,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:32,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:32,406 INFO L175 Difference]: Start difference. First operand has 51 places, 62 transitions, 192 flow. Second operand 3 states and 514 transitions. [2023-08-04 08:08:32,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 308 flow [2023-08-04 08:08:32,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:08:32,414 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 182 flow [2023-08-04 08:08:32,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-08-04 08:08:32,418 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:08:32,419 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 182 flow [2023-08-04 08:08:32,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:32,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:32,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:32,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:08:32,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:32,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash 708908335, now seen corresponding path program 1 times [2023-08-04 08:08:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177258133] [2023-08-04 08:08:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:32,527 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 08:08:32,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177258133] [2023-08-04 08:08:32,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177258133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:08:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975822189] [2023-08-04 08:08:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:32,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:32,531 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 08:08:32,555 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 08:08:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:32,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:08:32,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:08:32,614 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 08:08:32,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:08:32,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975822189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:32,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:08:32,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:08:32,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021287981] [2023-08-04 08:08:32,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:32,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:32,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:32,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:32,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:08:32,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 338 [2023-08-04 08:08:32,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:32,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:32,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 338 [2023-08-04 08:08:32,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:33,019 INFO L124 PetriNetUnfolderBase]: 3370/4771 cut-off events. [2023-08-04 08:08:33,019 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2023-08-04 08:08:33,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9767 conditions, 4771 events. 3370/4771 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20175 event pairs, 1100 based on Foata normal form. 0/2894 useless extension candidates. Maximal degree in co-relation 6942. Up to 4494 conditions per place. [2023-08-04 08:08:33,053 INFO L140 encePairwiseOnDemand]: 335/338 looper letters, 55 selfloop transitions, 2 changer transitions 1/62 dead transitions. [2023-08-04 08:08:33,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 308 flow [2023-08-04 08:08:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:08:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:08:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 08:08:33,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078895463510849 [2023-08-04 08:08:33,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 08:08:33,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 08:08:33,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:33,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 08:08:33,063 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 08:08:33,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:33,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:33,066 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 182 flow. Second operand 3 states and 515 transitions. [2023-08-04 08:08:33,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 308 flow [2023-08-04 08:08:33,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 284 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-04 08:08:33,072 INFO L231 Difference]: Finished difference. Result has 46 places, 57 transitions, 166 flow [2023-08-04 08:08:33,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=46, PETRI_TRANSITIONS=57} [2023-08-04 08:08:33,073 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-08-04 08:08:33,073 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 57 transitions, 166 flow [2023-08-04 08:08:33,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:33,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:33,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:33,084 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 08:08:33,279 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 08:08:33,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:33,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 270452334, now seen corresponding path program 1 times [2023-08-04 08:08:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:33,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111224787] [2023-08-04 08:08:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:33,415 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 08:08:33,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:33,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111224787] [2023-08-04 08:08:33,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111224787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:08:33,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508895217] [2023-08-04 08:08:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:33,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:33,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:33,417 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 08:08:33,420 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 08:08:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:33,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:08:33,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:08:33,486 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 08:08:33,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:08:33,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508895217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:33,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:08:33,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:08:33,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856684922] [2023-08-04 08:08:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:08:33,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 338 [2023-08-04 08:08:33,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 57 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:33,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:33,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 338 [2023-08-04 08:08:33,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:33,862 INFO L124 PetriNetUnfolderBase]: 3274/4643 cut-off events. [2023-08-04 08:08:33,862 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 08:08:33,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9500 conditions, 4643 events. 3274/4643 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19097 event pairs, 1091 based on Foata normal form. 0/2830 useless extension candidates. Maximal degree in co-relation 5381. Up to 4332 conditions per place. [2023-08-04 08:08:33,891 INFO L140 encePairwiseOnDemand]: 335/338 looper letters, 57 selfloop transitions, 2 changer transitions 1/64 dead transitions. [2023-08-04 08:08:33,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 300 flow [2023-08-04 08:08:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:08:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:08:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 08:08:33,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098619329388561 [2023-08-04 08:08:33,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 08:08:33,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 08:08:33,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:33,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 08:08:33,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:33,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:33,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:33,898 INFO L175 Difference]: Start difference. First operand has 46 places, 57 transitions, 166 flow. Second operand 3 states and 517 transitions. [2023-08-04 08:08:33,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 300 flow [2023-08-04 08:08:33,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:08:33,901 INFO L231 Difference]: Finished difference. Result has 47 places, 57 transitions, 170 flow [2023-08-04 08:08:33,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=57} [2023-08-04 08:08:33,902 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-08-04 08:08:33,902 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 57 transitions, 170 flow [2023-08-04 08:08:33,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:33,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:33,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:33,912 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 08:08:34,108 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 08:08:34,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:34,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash 652678781, now seen corresponding path program 1 times [2023-08-04 08:08:34,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:34,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202969477] [2023-08-04 08:08:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:34,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:34,174 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 08:08:34,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:34,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202969477] [2023-08-04 08:08:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202969477] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:08:34,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463658675] [2023-08-04 08:08:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:34,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:34,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:34,176 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 08:08:34,178 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 08:08:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:34,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:08:34,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:08:34,253 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 08:08:34,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:08:34,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463658675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:34,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:08:34,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:08:34,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948575900] [2023-08-04 08:08:34,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:34,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:34,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:34,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:34,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:08:34,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 338 [2023-08-04 08:08:34,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 57 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:34,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:34,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 338 [2023-08-04 08:08:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:34,590 INFO L124 PetriNetUnfolderBase]: 3266/4635 cut-off events. [2023-08-04 08:08:34,591 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 08:08:34,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9507 conditions, 4635 events. 3266/4635 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 18495 event pairs, 1102 based on Foata normal form. 0/2838 useless extension candidates. Maximal degree in co-relation 5385. Up to 4240 conditions per place. [2023-08-04 08:08:34,616 INFO L140 encePairwiseOnDemand]: 335/338 looper letters, 59 selfloop transitions, 2 changer transitions 1/66 dead transitions. [2023-08-04 08:08:34,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 312 flow [2023-08-04 08:08:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:08:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:08:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-04 08:08:34,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5118343195266272 [2023-08-04 08:08:34,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-04 08:08:34,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-04 08:08:34,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:34,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-04 08:08:34,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:34,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:34,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:34,623 INFO L175 Difference]: Start difference. First operand has 47 places, 57 transitions, 170 flow. Second operand 3 states and 519 transitions. [2023-08-04 08:08:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 312 flow [2023-08-04 08:08:34,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:08:34,626 INFO L231 Difference]: Finished difference. Result has 48 places, 57 transitions, 174 flow [2023-08-04 08:08:34,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=48, PETRI_TRANSITIONS=57} [2023-08-04 08:08:34,627 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-08-04 08:08:34,627 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 57 transitions, 174 flow [2023-08-04 08:08:34,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:34,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:34,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:34,638 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 08:08:34,833 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 08:08:34,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:34,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:34,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1129864089, now seen corresponding path program 1 times [2023-08-04 08:08:34,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:34,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499680677] [2023-08-04 08:08:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:34,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:34,912 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 08:08:34,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:34,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499680677] [2023-08-04 08:08:34,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499680677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:08:34,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058147658] [2023-08-04 08:08:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:34,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:34,915 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 08:08:34,917 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 08:08:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:34,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:08:34,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:08:35,000 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 08:08:35,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:08:35,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058147658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:35,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:08:35,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:08:35,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131227676] [2023-08-04 08:08:35,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:35,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:35,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:08:35,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 338 [2023-08-04 08:08:35,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 57 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:35,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 338 [2023-08-04 08:08:35,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:35,296 INFO L124 PetriNetUnfolderBase]: 2434/3499 cut-off events. [2023-08-04 08:08:35,297 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-04 08:08:35,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7280 conditions, 3499 events. 2434/3499 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13403 event pairs, 972 based on Foata normal form. 0/2150 useless extension candidates. Maximal degree in co-relation 4311. Up to 3048 conditions per place. [2023-08-04 08:08:35,314 INFO L140 encePairwiseOnDemand]: 335/338 looper letters, 65 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-04 08:08:35,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 344 flow [2023-08-04 08:08:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:08:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:08:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-04 08:08:35,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167652859960552 [2023-08-04 08:08:35,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-04 08:08:35,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-04 08:08:35,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:35,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-04 08:08:35,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,321 INFO L175 Difference]: Start difference. First operand has 48 places, 57 transitions, 174 flow. Second operand 3 states and 524 transitions. [2023-08-04 08:08:35,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 344 flow [2023-08-04 08:08:35,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:08:35,323 INFO L231 Difference]: Finished difference. Result has 49 places, 58 transitions, 182 flow [2023-08-04 08:08:35,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=49, PETRI_TRANSITIONS=58} [2023-08-04 08:08:35,324 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-08-04 08:08:35,324 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 58 transitions, 182 flow [2023-08-04 08:08:35,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:35,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:35,336 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 08:08:35,529 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 08:08:35,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:35,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:35,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1350179225, now seen corresponding path program 1 times [2023-08-04 08:08:35,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:35,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007258896] [2023-08-04 08:08:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:35,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:35,608 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 08:08:35,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:35,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007258896] [2023-08-04 08:08:35,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007258896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:08:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872759434] [2023-08-04 08:08:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:35,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:35,610 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 08:08:35,613 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 08:08:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:35,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:08:35,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:08:35,710 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 08:08:35,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:08:35,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872759434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:35,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:08:35,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:08:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525713354] [2023-08-04 08:08:35,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:35,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:35,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:08:35,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 338 [2023-08-04 08:08:35,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 58 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:35,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 338 [2023-08-04 08:08:35,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:35,952 INFO L124 PetriNetUnfolderBase]: 1877/2770 cut-off events. [2023-08-04 08:08:35,952 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-08-04 08:08:35,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5948 conditions, 2770 events. 1877/2770 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10286 event pairs, 709 based on Foata normal form. 0/1810 useless extension candidates. Maximal degree in co-relation 3602. Up to 2080 conditions per place. [2023-08-04 08:08:35,966 INFO L140 encePairwiseOnDemand]: 335/338 looper letters, 66 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 08:08:35,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 354 flow [2023-08-04 08:08:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:08:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:08:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-04 08:08:35,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167652859960552 [2023-08-04 08:08:35,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-04 08:08:35,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-04 08:08:35,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:35,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-04 08:08:35,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,973 INFO L175 Difference]: Start difference. First operand has 49 places, 58 transitions, 182 flow. Second operand 3 states and 524 transitions. [2023-08-04 08:08:35,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 354 flow [2023-08-04 08:08:35,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:08:35,976 INFO L231 Difference]: Finished difference. Result has 51 places, 59 transitions, 192 flow [2023-08-04 08:08:35,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=51, PETRI_TRANSITIONS=59} [2023-08-04 08:08:35,977 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-04 08:08:35,977 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 59 transitions, 192 flow [2023-08-04 08:08:35,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:35,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:35,978 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 08:08:35,983 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 08:08:36,183 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 08:08:36,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:36,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:36,183 INFO L85 PathProgramCache]: Analyzing trace with hash -66374099, now seen corresponding path program 1 times [2023-08-04 08:08:36,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:36,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463416702] [2023-08-04 08:08:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:36,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:36,236 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 08:08:36,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463416702] [2023-08-04 08:08:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463416702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:08:36,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108129757] [2023-08-04 08:08:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:36,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:36,238 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 08:08:36,258 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 08:08:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:36,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:08:36,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:08:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:08:36,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:08:36,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108129757] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:36,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:08:36,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:08:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739865297] [2023-08-04 08:08:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:36,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:08:36,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 338 [2023-08-04 08:08:36,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:36,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:36,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 338 [2023-08-04 08:08:36,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:36,563 INFO L124 PetriNetUnfolderBase]: 1712/2537 cut-off events. [2023-08-04 08:08:36,564 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2023-08-04 08:08:36,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5611 conditions, 2537 events. 1712/2537 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9167 event pairs, 770 based on Foata normal form. 0/1726 useless extension candidates. Maximal degree in co-relation 3385. Up to 2206 conditions per place. [2023-08-04 08:08:36,577 INFO L140 encePairwiseOnDemand]: 335/338 looper letters, 67 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 08:08:36,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 366 flow [2023-08-04 08:08:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:08:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:08:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-04 08:08:36,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167652859960552 [2023-08-04 08:08:36,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-04 08:08:36,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-04 08:08:36,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:36,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-04 08:08:36,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:36,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:36,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:36,582 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 192 flow. Second operand 3 states and 524 transitions. [2023-08-04 08:08:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 366 flow [2023-08-04 08:08:36,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:08:36,588 INFO L231 Difference]: Finished difference. Result has 53 places, 60 transitions, 202 flow [2023-08-04 08:08:36,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=53, PETRI_TRANSITIONS=60} [2023-08-04 08:08:36,588 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:08:36,588 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 60 transitions, 202 flow [2023-08-04 08:08:36,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:36,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:36,589 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] [2023-08-04 08:08:36,596 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 08:08:36,794 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 08:08:36,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:36,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash 505998095, now seen corresponding path program 1 times [2023-08-04 08:08:36,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:36,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065397533] [2023-08-04 08:08:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:36,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:08:36,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:36,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065397533] [2023-08-04 08:08:36,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065397533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:08:36,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757023085] [2023-08-04 08:08:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:36,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:36,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:36,871 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 08:08:36,881 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 08:08:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:36,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:08:36,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:08:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:08:36,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:08:36,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757023085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:36,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:08:36,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:08:36,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767090964] [2023-08-04 08:08:36,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:36,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:08:36,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 338 [2023-08-04 08:08:36,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 60 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:36,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:36,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 338 [2023-08-04 08:08:36,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:37,191 INFO L124 PetriNetUnfolderBase]: 1703/2522 cut-off events. [2023-08-04 08:08:37,191 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2023-08-04 08:08:37,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5610 conditions, 2522 events. 1703/2522 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9083 event pairs, 819 based on Foata normal form. 0/1732 useless extension candidates. Maximal degree in co-relation 4867. Up to 2367 conditions per place. [2023-08-04 08:08:37,201 INFO L140 encePairwiseOnDemand]: 335/338 looper letters, 59 selfloop transitions, 2 changer transitions 4/69 dead transitions. [2023-08-04 08:08:37,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 69 transitions, 350 flow [2023-08-04 08:08:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:08:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:08:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-04 08:08:37,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5118343195266272 [2023-08-04 08:08:37,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-04 08:08:37,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-04 08:08:37,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:37,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-04 08:08:37,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,207 INFO L175 Difference]: Start difference. First operand has 53 places, 60 transitions, 202 flow. Second operand 3 states and 519 transitions. [2023-08-04 08:08:37,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 69 transitions, 350 flow [2023-08-04 08:08:37,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:08:37,212 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 196 flow [2023-08-04 08:08:37,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-08-04 08:08:37,213 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-04 08:08:37,213 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 196 flow [2023-08-04 08:08:37,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:37,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:37,226 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 08:08:37,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:37,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:37,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:37,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1286179671, now seen corresponding path program 1 times [2023-08-04 08:08:37,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:37,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496781916] [2023-08-04 08:08:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:37,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:08:37,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:37,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496781916] [2023-08-04 08:08:37,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496781916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:08:37,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998083090] [2023-08-04 08:08:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:37,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:08:37,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:08:37,496 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 08:08:37,500 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 08:08:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:37,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:08:37,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:08:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:08:37,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:08:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:08:37,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998083090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:08:37,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:08:37,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:08:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975687643] [2023-08-04 08:08:37,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:08:37,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:08:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:08:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:08:37,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 338 [2023-08-04 08:08:37,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:37,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 338 [2023-08-04 08:08:37,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:08:37,682 INFO L124 PetriNetUnfolderBase]: 5/13 cut-off events. [2023-08-04 08:08:37,682 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:08:37,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 13 events. 5/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 29. Up to 8 conditions per place. [2023-08-04 08:08:37,682 INFO L140 encePairwiseOnDemand]: 335/338 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 08:08:37,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 9 transitions, 40 flow [2023-08-04 08:08:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:08:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:08:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 614 transitions. [2023-08-04 08:08:37,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541420118343195 [2023-08-04 08:08:37,685 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 614 transitions. [2023-08-04 08:08:37,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 614 transitions. [2023-08-04 08:08:37,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:08:37,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 614 transitions. [2023-08-04 08:08:37,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,689 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,689 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 196 flow. Second operand 4 states and 614 transitions. [2023-08-04 08:08:37,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 9 transitions, 40 flow [2023-08-04 08:08:37,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:08:37,689 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 08:08:37,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 08:08:37,690 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -30 predicate places. [2023-08-04 08:08:37,690 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 08:08:37,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:37,693 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:08:37,705 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 08:08:37,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-04 08:08:37,898 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:37,900 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:08:37,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:38,000 INFO L124 PetriNetUnfolderBase]: 269/1437 cut-off events. [2023-08-04 08:08:38,000 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:08:38,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 1437 events. 269/1437 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9424 event pairs, 0 based on Foata normal form. 0/1186 useless extension candidates. Maximal degree in co-relation 798. Up to 33 conditions per place. [2023-08-04 08:08:38,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:38,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:38,012 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:08:38,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:38,012 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:38,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 191 transitions, 450 flow [2023-08-04 08:08:38,106 INFO L124 PetriNetUnfolderBase]: 269/1437 cut-off events. [2023-08-04 08:08:38,106 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:08:38,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 1437 events. 269/1437 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9424 event pairs, 0 based on Foata normal form. 0/1186 useless extension candidates. Maximal degree in co-relation 798. Up to 33 conditions per place. [2023-08-04 08:08:38,128 INFO L119 LiptonReduction]: Number of co-enabled transitions 5280 [2023-08-04 08:08:41,358 INFO L134 LiptonReduction]: Checked pairs total: 12420 [2023-08-04 08:08:41,358 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-04 08:08:41,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:08:41,360 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;@52e895f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:08:41,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 08:08:41,363 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:08:41,363 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2023-08-04 08:08:41,363 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:08:41,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:41,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:08:41,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 08:08:41,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1109380633, now seen corresponding path program 1 times [2023-08-04 08:08:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:41,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417234194] [2023-08-04 08:08:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:41,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:08:41,409 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:08:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:08:41,448 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:08:41,449 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:08:41,449 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 08:08:41,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 08:08:41,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 08:08:41,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 08:08:41,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:08:41,450 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:08:41,450 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:08:41,451 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:08:41,451 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:08:41,482 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 08:08:41,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 235 transitions, 614 flow [2023-08-04 08:08:43,389 INFO L124 PetriNetUnfolderBase]: 5482/20040 cut-off events. [2023-08-04 08:08:43,389 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 08:08:43,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24425 conditions, 20040 events. 5482/20040 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 209251 event pairs, 162 based on Foata normal form. 0/17079 useless extension candidates. Maximal degree in co-relation 12057. Up to 1024 conditions per place. [2023-08-04 08:08:43,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 235 transitions, 614 flow [2023-08-04 08:08:43,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 235 transitions, 614 flow [2023-08-04 08:08:43,661 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:08:43,662 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 235 transitions, 614 flow [2023-08-04 08:08:43,662 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 235 transitions, 614 flow [2023-08-04 08:08:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 235 transitions, 614 flow [2023-08-04 08:08:45,594 INFO L124 PetriNetUnfolderBase]: 5482/20040 cut-off events. [2023-08-04 08:08:45,594 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 08:08:45,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24425 conditions, 20040 events. 5482/20040 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 209251 event pairs, 162 based on Foata normal form. 0/17079 useless extension candidates. Maximal degree in co-relation 12057. Up to 1024 conditions per place. [2023-08-04 08:08:45,886 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2023-08-04 08:08:49,128 INFO L134 LiptonReduction]: Checked pairs total: 58814 [2023-08-04 08:08:49,129 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-04 08:08:49,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:08:49,130 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;@52e895f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:08:49,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:08:49,134 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:08:49,134 INFO L124 PetriNetUnfolderBase]: 5/59 cut-off events. [2023-08-04 08:08:49,135 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:08:49,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:08:49,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:08:49,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:08:49,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:08:49,135 INFO L85 PathProgramCache]: Analyzing trace with hash -6560999, now seen corresponding path program 1 times [2023-08-04 08:08:49,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:08:49,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613659403] [2023-08-04 08:08:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:08:49,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:08:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:08:49,160 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 08:08:49,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:08:49,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613659403] [2023-08-04 08:08:49,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613659403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:08:49,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:08:49,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:08:49,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108512330] [2023-08-04 08:08:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:08:49,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:08:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:08:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:08:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:08:49,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 390 [2023-08-04 08:08:49,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:08:49,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:08:49,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 390 [2023-08-04 08:08:49,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:18,999 INFO L124 PetriNetUnfolderBase]: 308348/424699 cut-off events. [2023-08-04 08:09:18,999 INFO L125 PetriNetUnfolderBase]: For 104730/104730 co-relation queries the response was YES. [2023-08-04 08:09:21,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897251 conditions, 424699 events. 308348/424699 cut-off events. For 104730/104730 co-relation queries the response was YES. Maximal size of possible extension queue 6449. Compared 3031239 event pairs, 212879 based on Foata normal form. 0/395287 useless extension candidates. Maximal degree in co-relation 371361. Up to 398775 conditions per place. [2023-08-04 08:09:23,864 INFO L140 encePairwiseOnDemand]: 386/390 looper letters, 74 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-04 08:09:23,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 504 flow [2023-08-04 08:09:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-04 08:09:23,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2023-08-04 08:09:23,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-04 08:09:23,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-04 08:09:23,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:23,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-04 08:09:23,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:23,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:23,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:23,876 INFO L175 Difference]: Start difference. First operand has 79 places, 102 transitions, 348 flow. Second operand 3 states and 594 transitions. [2023-08-04 08:09:23,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 504 flow [2023-08-04 08:09:24,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 104 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:09:24,053 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 358 flow [2023-08-04 08:09:24,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2023-08-04 08:09:24,054 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2023-08-04 08:09:24,054 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 358 flow [2023-08-04 08:09:24,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:24,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:24,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:24,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 08:09:24,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:24,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1150092488, now seen corresponding path program 1 times [2023-08-04 08:09:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:24,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976523292] [2023-08-04 08:09:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:24,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:24,088 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 08:09:24,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:24,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976523292] [2023-08-04 08:09:24,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976523292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:24,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800872523] [2023-08-04 08:09:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:24,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:24,090 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 08:09:24,093 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 08:09:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:24,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:24,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:24,174 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 08:09:24,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800872523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:24,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:09:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972233023] [2023-08-04 08:09:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:24,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 390 [2023-08-04 08:09:24,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:24,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:24,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 390 [2023-08-04 08:09:24,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:52,555 INFO L124 PetriNetUnfolderBase]: 306012/419243 cut-off events. [2023-08-04 08:09:52,555 INFO L125 PetriNetUnfolderBase]: For 110511/110511 co-relation queries the response was YES. [2023-08-04 08:09:54,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888054 conditions, 419243 events. 306012/419243 cut-off events. For 110511/110511 co-relation queries the response was YES. Maximal size of possible extension queue 6732. Compared 2955792 event pairs, 211818 based on Foata normal form. 0/389645 useless extension candidates. Maximal degree in co-relation 888022. Up to 395505 conditions per place. [2023-08-04 08:09:57,466 INFO L140 encePairwiseOnDemand]: 387/390 looper letters, 77 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-04 08:09:57,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 526 flow [2023-08-04 08:09:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-04 08:09:57,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085470085470085 [2023-08-04 08:09:57,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-04 08:09:57,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-04 08:09:57,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:57,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-04 08:09:57,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:57,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:57,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:57,498 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 358 flow. Second operand 3 states and 595 transitions. [2023-08-04 08:09:57,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 526 flow [2023-08-04 08:09:57,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 524 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:09:57,671 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 368 flow [2023-08-04 08:09:57,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2023-08-04 08:09:57,672 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 4 predicate places. [2023-08-04 08:09:57,672 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 368 flow [2023-08-04 08:09:57,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:57,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:57,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:57,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 08:09:57,879 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 08:09:57,880 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:57,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1304656836, now seen corresponding path program 1 times [2023-08-04 08:09:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679370278] [2023-08-04 08:09:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:57,967 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 08:09:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:57,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679370278] [2023-08-04 08:09:57,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679370278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370426472] [2023-08-04 08:09:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:57,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:57,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:57,984 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 08:09:58,074 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 08:09:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:58,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:58,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:58,159 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 08:09:58,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:58,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370426472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:58,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:58,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:09:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060767597] [2023-08-04 08:09:58,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:58,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:58,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:58,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 390 [2023-08-04 08:09:58,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:09:58,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:58,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 390 [2023-08-04 08:09:58,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:10:30,869 INFO L124 PetriNetUnfolderBase]: 304200/416693 cut-off events. [2023-08-04 08:10:30,870 INFO L125 PetriNetUnfolderBase]: For 102629/102629 co-relation queries the response was YES. [2023-08-04 08:10:33,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882845 conditions, 416693 events. 304200/416693 cut-off events. For 102629/102629 co-relation queries the response was YES. Maximal size of possible extension queue 7167. Compared 2939911 event pairs, 210923 based on Foata normal form. 0/387437 useless extension candidates. Maximal degree in co-relation 392216. Up to 392561 conditions per place. [2023-08-04 08:10:35,705 INFO L140 encePairwiseOnDemand]: 387/390 looper letters, 80 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-04 08:10:35,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 546 flow [2023-08-04 08:10:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:10:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:10:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-04 08:10:35,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102564102564102 [2023-08-04 08:10:35,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-04 08:10:35,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-04 08:10:35,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:10:35,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-04 08:10:35,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:10:35,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:10:35,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:10:35,712 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 368 flow. Second operand 3 states and 597 transitions. [2023-08-04 08:10:35,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 546 flow [2023-08-04 08:10:35,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 110 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:10:35,795 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 378 flow [2023-08-04 08:10:35,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=378, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2023-08-04 08:10:35,796 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 6 predicate places. [2023-08-04 08:10:35,796 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 378 flow [2023-08-04 08:10:35,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:10:35,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:10:35,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:10:35,801 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 08:10:35,997 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 08:10:35,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:10:35,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:10:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1121811455, now seen corresponding path program 1 times [2023-08-04 08:10:35,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:10:35,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514180837] [2023-08-04 08:10:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:10:35,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:10:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:10:36,032 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 08:10:36,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:10:36,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514180837] [2023-08-04 08:10:36,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514180837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:10:36,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822226735] [2023-08-04 08:10:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:10:36,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:10:36,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:10:36,034 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 08:10:36,044 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 08:10:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:10:36,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:10:36,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:10:36,127 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 08:10:36,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:10:36,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822226735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:10:36,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:10:36,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:10:36,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726447112] [2023-08-04 08:10:36,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:10:36,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:10:36,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:10:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:10:36,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:10:36,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 390 [2023-08-04 08:10:36,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:10:36,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:10:36,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 390 [2023-08-04 08:10:36,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:11:05,107 INFO L124 PetriNetUnfolderBase]: 304056/420797 cut-off events. [2023-08-04 08:11:05,107 INFO L125 PetriNetUnfolderBase]: For 74213/74213 co-relation queries the response was YES. [2023-08-04 08:11:08,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887262 conditions, 420797 events. 304056/420797 cut-off events. For 74213/74213 co-relation queries the response was YES. Maximal size of possible extension queue 7682. Compared 3034193 event pairs, 210236 based on Foata normal form. 0/392999 useless extension candidates. Maximal degree in co-relation 393424. Up to 389705 conditions per place. [2023-08-04 08:11:09,952 INFO L140 encePairwiseOnDemand]: 387/390 looper letters, 83 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2023-08-04 08:11:09,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 113 transitions, 566 flow [2023-08-04 08:11:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:11:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:11:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 08:11:09,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119658119658119 [2023-08-04 08:11:09,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 08:11:09,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 08:11:09,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:11:09,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 08:11:09,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:09,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:09,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:09,959 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 378 flow. Second operand 3 states and 599 transitions. [2023-08-04 08:11:09,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 113 transitions, 566 flow [2023-08-04 08:11:10,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 113 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:11:10,056 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 388 flow [2023-08-04 08:11:10,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=87, PETRI_TRANSITIONS=105} [2023-08-04 08:11:10,056 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2023-08-04 08:11:10,056 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 388 flow [2023-08-04 08:11:10,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:10,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:11:10,057 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 08:11:10,061 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 08:11:10,257 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 08:11:10,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:11:10,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:11:10,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1958199431, now seen corresponding path program 1 times [2023-08-04 08:11:10,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:11:10,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220458240] [2023-08-04 08:11:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:11:10,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:11:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:11:10,300 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 08:11:10,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:11:10,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220458240] [2023-08-04 08:11:10,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220458240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:11:10,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463477074] [2023-08-04 08:11:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:11:10,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:11:10,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:11:10,302 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 08:11:10,305 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 08:11:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:11:10,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:11:10,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:11:10,404 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 08:11:10,404 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:11:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463477074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:11:10,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:11:10,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:11:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357452690] [2023-08-04 08:11:10,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:11:10,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:11:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:11:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:11:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:11:10,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 390 [2023-08-04 08:11:10,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:10,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:11:10,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 390 [2023-08-04 08:11:10,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:11:39,896 INFO L124 PetriNetUnfolderBase]: 298968/415069 cut-off events. [2023-08-04 08:11:39,896 INFO L125 PetriNetUnfolderBase]: For 74869/74869 co-relation queries the response was YES. [2023-08-04 08:11:42,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879663 conditions, 415069 events. 298968/415069 cut-off events. For 74869/74869 co-relation queries the response was YES. Maximal size of possible extension queue 8201. Compared 3024607 event pairs, 215818 based on Foata normal form. 0/389591 useless extension candidates. Maximal degree in co-relation 419080. Up to 361273 conditions per place. [2023-08-04 08:11:44,936 INFO L140 encePairwiseOnDemand]: 387/390 looper letters, 93 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-08-04 08:11:44,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 638 flow [2023-08-04 08:11:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:11:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:11:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-08-04 08:11:44,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196581196581197 [2023-08-04 08:11:44,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-08-04 08:11:44,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-08-04 08:11:44,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:11:44,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-08-04 08:11:44,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:44,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:44,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:44,943 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 388 flow. Second operand 3 states and 608 transitions. [2023-08-04 08:11:44,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 638 flow [2023-08-04 08:11:45,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 636 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:11:45,114 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 398 flow [2023-08-04 08:11:45,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2023-08-04 08:11:45,115 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 10 predicate places. [2023-08-04 08:11:45,116 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 398 flow [2023-08-04 08:11:45,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:45,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:11:45,117 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] [2023-08-04 08:11:45,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 08:11:45,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:11:45,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:11:45,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:11:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1258775053, now seen corresponding path program 1 times [2023-08-04 08:11:45,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:11:45,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494870709] [2023-08-04 08:11:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:11:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:11:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:11:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:11:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:11:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494870709] [2023-08-04 08:11:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494870709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:11:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792109793] [2023-08-04 08:11:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:11:45,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:11:45,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:11:45,434 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:11:45,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:11:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:11:45,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:11:45,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:11:45,575 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 08:11:45,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:11:45,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792109793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:11:45,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:11:45,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:11:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240648770] [2023-08-04 08:11:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:11:45,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:11:45,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:11:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:11:45,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:11:45,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 390 [2023-08-04 08:11:45,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:11:45,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:11:45,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 390 [2023-08-04 08:11:45,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:21,484 INFO L124 PetriNetUnfolderBase]: 304023/425376 cut-off events. [2023-08-04 08:12:21,484 INFO L125 PetriNetUnfolderBase]: For 95550/95550 co-relation queries the response was YES. [2023-08-04 08:12:25,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925807 conditions, 425376 events. 304023/425376 cut-off events. For 95550/95550 co-relation queries the response was YES. Maximal size of possible extension queue 7791. Compared 3143496 event pairs, 199163 based on Foata normal form. 0/409275 useless extension candidates. Maximal degree in co-relation 479376. Up to 322953 conditions per place. [2023-08-04 08:12:27,647 INFO L140 encePairwiseOnDemand]: 387/390 looper letters, 94 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2023-08-04 08:12:27,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 650 flow [2023-08-04 08:12:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-08-04 08:12:27,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196581196581197 [2023-08-04 08:12:27,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-08-04 08:12:27,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-08-04 08:12:27,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:27,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-08-04 08:12:27,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:12:27,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:12:27,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:12:27,676 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 398 flow. Second operand 3 states and 608 transitions. [2023-08-04 08:12:27,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 650 flow [2023-08-04 08:12:28,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 124 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:12:28,382 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 408 flow [2023-08-04 08:12:28,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2023-08-04 08:12:28,383 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2023-08-04 08:12:28,383 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 408 flow [2023-08-04 08:12:28,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:12:28,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:28,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:12:28,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:12:28,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:12:28,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:28,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash 18872753, now seen corresponding path program 1 times [2023-08-04 08:12:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:28,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888822339] [2023-08-04 08:12:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:28,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:28,696 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 08:12:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888822339] [2023-08-04 08:12:28,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888822339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023886320] [2023-08-04 08:12:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:28,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:28,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:28,698 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:12:28,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:12:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:28,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:28,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:12:28,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:28,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023886320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:28,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:28,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10897794] [2023-08-04 08:12:28,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:28,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:28,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:28,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:28,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:28,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 390 [2023-08-04 08:12:28,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:12:28,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:28,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 390 [2023-08-04 08:12:28,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:13:03,376 INFO L124 PetriNetUnfolderBase]: 300118/422883 cut-off events. [2023-08-04 08:13:03,376 INFO L125 PetriNetUnfolderBase]: For 110169/110169 co-relation queries the response was YES. [2023-08-04 08:13:07,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945058 conditions, 422883 events. 300118/422883 cut-off events. For 110169/110169 co-relation queries the response was YES. Maximal size of possible extension queue 6760. Compared 3131979 event pairs, 212644 based on Foata normal form. 0/415647 useless extension candidates. Maximal degree in co-relation 507320. Up to 338731 conditions per place. [2023-08-04 08:13:09,830 INFO L140 encePairwiseOnDemand]: 387/390 looper letters, 95 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-08-04 08:13:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 125 transitions, 662 flow [2023-08-04 08:13:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:13:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:13:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-08-04 08:13:09,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196581196581197 [2023-08-04 08:13:09,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-08-04 08:13:09,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-08-04 08:13:09,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:13:09,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-08-04 08:13:09,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:13:09,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:13:09,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:13:09,857 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 408 flow. Second operand 3 states and 608 transitions. [2023-08-04 08:13:09,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 125 transitions, 662 flow [2023-08-04 08:13:34,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 125 transitions, 660 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:13:34,153 INFO L231 Difference]: Finished difference. Result has 93 places, 108 transitions, 418 flow [2023-08-04 08:13:34,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=93, PETRI_TRANSITIONS=108} [2023-08-04 08:13:34,154 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 14 predicate places. [2023-08-04 08:13:34,154 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 108 transitions, 418 flow [2023-08-04 08:13:34,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:13:34,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:13:34,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:13:34,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:13:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:13:34,360 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:13:34,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:13:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash 371849772, now seen corresponding path program 1 times [2023-08-04 08:13:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:13:34,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062184210] [2023-08-04 08:13:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:13:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:13:34,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:13:34,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062184210] [2023-08-04 08:13:34,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062184210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:13:34,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068925575] [2023-08-04 08:13:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:34,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:13:34,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:13:34,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:13:34,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:13:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:34,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:13:34,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:13:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:13:34,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:13:34,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068925575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:13:34,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:13:34,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:13:34,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801367482] [2023-08-04 08:13:34,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:13:34,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:13:34,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:13:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:13:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:13:34,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 390 [2023-08-04 08:13:34,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 108 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:13:34,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:13:34,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 390 [2023-08-04 08:13:34,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:14:11,468 INFO L124 PetriNetUnfolderBase]: 303829/429350 cut-off events. [2023-08-04 08:14:11,469 INFO L125 PetriNetUnfolderBase]: For 117363/117363 co-relation queries the response was YES. [2023-08-04 08:14:15,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972612 conditions, 429350 events. 303829/429350 cut-off events. For 117363/117363 co-relation queries the response was YES. Maximal size of possible extension queue 6696. Compared 3180576 event pairs, 231949 based on Foata normal form. 0/427395 useless extension candidates. Maximal degree in co-relation 627234. Up to 368813 conditions per place. [2023-08-04 08:14:17,154 INFO L140 encePairwiseOnDemand]: 387/390 looper letters, 96 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-04 08:14:17,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 674 flow [2023-08-04 08:14:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:14:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:14:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-08-04 08:14:17,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196581196581197 [2023-08-04 08:14:17,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-08-04 08:14:17,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-08-04 08:14:17,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:14:17,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-08-04 08:14:17,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:14:17,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:14:17,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 390.0) internal successors, (1560), 4 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:14:17,159 INFO L175 Difference]: Start difference. First operand has 93 places, 108 transitions, 418 flow. Second operand 3 states and 608 transitions. [2023-08-04 08:14:17,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 674 flow [2023-08-04 08:14:50,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 126 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:14:50,773 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 428 flow [2023-08-04 08:14:50,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2023-08-04 08:14:50,774 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 16 predicate places. [2023-08-04 08:14:50,774 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 428 flow [2023-08-04 08:14:50,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:14:50,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:14:50,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:14:50,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:14:50,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:14:50,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:14:50,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:14:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1952437165, now seen corresponding path program 1 times [2023-08-04 08:14:50,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:14:50,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740258610] [2023-08-04 08:14:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:14:50,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:14:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:14:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:14:51,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:14:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740258610] [2023-08-04 08:14:51,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740258610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:14:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287179195] [2023-08-04 08:14:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:14:51,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:14:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:14:51,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:14:51,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:14:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:14:51,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:14:51,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:14:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:14:51,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:14:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:14:51,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287179195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:14:51,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:14:51,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:14:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477495861] [2023-08-04 08:14:51,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:14:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:14:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:14:51,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:14:51,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:14:51,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 390 [2023-08-04 08:14:51,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 428 flow. Second operand has 5 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:14:51,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:14:51,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 390 [2023-08-04 08:14:51,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand