/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:39:37,433 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:39:37,479 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:39:37,483 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:39:37,483 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:39:37,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:39:37,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:39:37,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:39:37,502 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:39:37,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:39:37,503 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:39:37,503 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:39:37,504 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:39:37,504 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:39:37,505 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:39:37,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:39:37,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:39:37,505 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:39:37,506 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:39:37,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:39:37,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:39:37,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:39:37,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:39:37,508 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:39:37,508 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:39:37,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:39:37,508 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:39:37,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:39:37,509 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:39:37,509 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:39:37,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:39:37,510 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:39:37,510 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:39:37,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:39:37,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:39:37,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:39:37,511 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:39:37,512 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:39:37,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:39:37,512 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:39:37,513 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:39:37,513 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:39:37,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:39:37,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:39:37,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:39:37,750 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:39:37,750 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:39:37,751 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-04 09:39:38,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:39:39,073 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:39:39,073 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-04 09:39:39,080 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa270c1a/3dfd3902f7694e59bd7e5354f273751b/FLAG4cd2ad7f2 [2023-08-04 09:39:39,093 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa270c1a/3dfd3902f7694e59bd7e5354f273751b [2023-08-04 09:39:39,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:39:39,097 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:39:39,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:39:39,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:39:39,101 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:39:39,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@392643fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39, skipping insertion in model container [2023-08-04 09:39:39,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,124 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:39:39,261 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c[2815,2828] [2023-08-04 09:39:39,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:39:39,273 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:39:39,294 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c[2815,2828] [2023-08-04 09:39:39,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:39:39,306 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:39:39,307 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:39:39,312 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:39:39,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39 WrapperNode [2023-08-04 09:39:39,312 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:39:39,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:39:39,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:39:39,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:39:39,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,349 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 179 [2023-08-04 09:39:39,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:39:39,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:39:39,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:39:39,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:39:39,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,362 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,369 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:39:39,379 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:39:39,379 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:39:39,379 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:39:39,380 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (1/1) ... [2023-08-04 09:39:39,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:39:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:39,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 09:39:39,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:39:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:39:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:39:39,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:39:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:39:39,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:39:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:39:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:39:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:39:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:39:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:39:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:39:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:39:39,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:39:39,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:39:39,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:39:39,447 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:39:39,533 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:39:39,536 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:39:39,852 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:39:39,943 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:39:39,943 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 09:39:39,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:39:39 BoogieIcfgContainer [2023-08-04 09:39:39,945 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:39:39,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:39:39,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:39:39,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:39:39,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:39:39" (1/3) ... [2023-08-04 09:39:39,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fbafd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:39:39, skipping insertion in model container [2023-08-04 09:39:39,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:39:39" (2/3) ... [2023-08-04 09:39:39,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fbafd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:39:39, skipping insertion in model container [2023-08-04 09:39:39,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:39:39" (3/3) ... [2023-08-04 09:39:39,952 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-04 09:39:39,959 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:39:39,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:39:39,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:39:39,967 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:39:40,017 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:39:40,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:40,134 INFO L124 PetriNetUnfolderBase]: 40/308 cut-off events. [2023-08-04 09:39:40,134 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:39:40,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 308 events. 40/308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 996 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 09:39:40,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:40,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:40,151 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:40,159 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:40,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:40,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:40,242 INFO L124 PetriNetUnfolderBase]: 40/308 cut-off events. [2023-08-04 09:39:40,242 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:39:40,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 308 events. 40/308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 996 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 09:39:40,251 INFO L119 LiptonReduction]: Number of co-enabled transitions 3510 [2023-08-04 09:39:44,126 INFO L134 LiptonReduction]: Checked pairs total: 4122 [2023-08-04 09:39:44,127 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-04 09:39:44,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:39:44,144 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;@18f6c06c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:44,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:39:44,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:44,147 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-04 09:39:44,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:44,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:44,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:39:44,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:44,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:44,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1152666352, now seen corresponding path program 1 times [2023-08-04 09:39:44,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:44,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285216666] [2023-08-04 09:39:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:39:44,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:44,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285216666] [2023-08-04 09:39:44,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285216666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:44,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:39:44,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:39:44,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383643242] [2023-08-04 09:39:44,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:44,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:44,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:39:44,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 311 [2023-08-04 09:39:44,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:44,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 311 [2023-08-04 09:39:44,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:44,575 INFO L124 PetriNetUnfolderBase]: 164/284 cut-off events. [2023-08-04 09:39:44,575 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-04 09:39:44,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 284 events. 164/284 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 950 event pairs, 40 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 418. Up to 261 conditions per place. [2023-08-04 09:39:44,580 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 25 selfloop transitions, 2 changer transitions 3/33 dead transitions. [2023-08-04 09:39:44,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 144 flow [2023-08-04 09:39:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-04 09:39:44,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565916398713826 [2023-08-04 09:39:44,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-04 09:39:44,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-04 09:39:44,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:44,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-04 09:39:44,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,635 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 3 states and 426 transitions. [2023-08-04 09:39:44,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 144 flow [2023-08-04 09:39:44,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:39:44,641 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 82 flow [2023-08-04 09:39:44,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-08-04 09:39:44,646 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-04 09:39:44,646 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 82 flow [2023-08-04 09:39:44,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:44,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:44,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:39:44,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:44,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1239114755, now seen corresponding path program 1 times [2023-08-04 09:39:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:44,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979669163] [2023-08-04 09:39:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:44,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:39:44,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979669163] [2023-08-04 09:39:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979669163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351826603] [2023-08-04 09:39:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:44,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:44,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:44,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:44,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:39:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:44,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:44,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:39:44,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351826603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:44,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:44,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931265255] [2023-08-04 09:39:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:44,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:44,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 311 [2023-08-04 09:39:44,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:44,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 311 [2023-08-04 09:39:44,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:44,993 INFO L124 PetriNetUnfolderBase]: 162/277 cut-off events. [2023-08-04 09:39:44,993 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 09:39:44,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 277 events. 162/277 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 867 event pairs, 50 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 412. Up to 246 conditions per place. [2023-08-04 09:39:44,997 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 27 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 09:39:44,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 152 flow [2023-08-04 09:39:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-04 09:39:45,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45766345123258306 [2023-08-04 09:39:45,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-04 09:39:45,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-04 09:39:45,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:45,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-04 09:39:45,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,013 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 82 flow. Second operand 3 states and 427 transitions. [2023-08-04 09:39:45,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 152 flow [2023-08-04 09:39:45,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 33 transitions, 142 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:39:45,015 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 80 flow [2023-08-04 09:39:45,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2023-08-04 09:39:45,016 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-04 09:39:45,016 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 80 flow [2023-08-04 09:39:45,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:45,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:45,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:45,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:45,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:45,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1650282214, now seen corresponding path program 1 times [2023-08-04 09:39:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:45,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456692354] [2023-08-04 09:39:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:45,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:39:45,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456692354] [2023-08-04 09:39:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456692354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:45,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506008159] [2023-08-04 09:39:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:45,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:45,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:45,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:45,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:39:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:45,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:45,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:39:45,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:45,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506008159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:45,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:45,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414052903] [2023-08-04 09:39:45,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:45,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:45,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:45,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 311 [2023-08-04 09:39:45,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:45,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 311 [2023-08-04 09:39:45,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:45,531 INFO L124 PetriNetUnfolderBase]: 109/196 cut-off events. [2023-08-04 09:39:45,532 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 09:39:45,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 196 events. 109/196 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 520 event pairs, 33 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 201. Up to 137 conditions per place. [2023-08-04 09:39:45,533 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 31 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-04 09:39:45,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 166 flow [2023-08-04 09:39:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-08-04 09:39:45,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608788853161844 [2023-08-04 09:39:45,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-08-04 09:39:45,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-08-04 09:39:45,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:45,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-08-04 09:39:45,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,543 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 80 flow. Second operand 3 states and 430 transitions. [2023-08-04 09:39:45,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 166 flow [2023-08-04 09:39:45,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:45,545 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 88 flow [2023-08-04 09:39:45,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-08-04 09:39:45,547 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-04 09:39:45,547 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 88 flow [2023-08-04 09:39:45,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:45,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:45,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:45,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:39:45,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:45,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2084697532, now seen corresponding path program 1 times [2023-08-04 09:39:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:45,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457053911] [2023-08-04 09:39:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:39:45,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:45,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457053911] [2023-08-04 09:39:45,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457053911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:45,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421697607] [2023-08-04 09:39:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:45,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:45,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:45,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:45,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:39:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:45,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:45,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:45,924 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:45,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421697607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:45,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:45,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:39:45,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912153440] [2023-08-04 09:39:45,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:45,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:45,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:45,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 311 [2023-08-04 09:39:45,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:45,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:45,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 311 [2023-08-04 09:39:45,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:45,998 INFO L124 PetriNetUnfolderBase]: 102/186 cut-off events. [2023-08-04 09:39:45,998 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 09:39:45,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 186 events. 102/186 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 471 event pairs, 42 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 202. Up to 152 conditions per place. [2023-08-04 09:39:46,002 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 27 selfloop transitions, 2 changer transitions 2/34 dead transitions. [2023-08-04 09:39:46,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 160 flow [2023-08-04 09:39:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-04 09:39:46,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45766345123258306 [2023-08-04 09:39:46,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-04 09:39:46,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-04 09:39:46,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:46,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-04 09:39:46,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,009 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 88 flow. Second operand 3 states and 427 transitions. [2023-08-04 09:39:46,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 160 flow [2023-08-04 09:39:46,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 34 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:46,011 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 90 flow [2023-08-04 09:39:46,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-08-04 09:39:46,013 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-04 09:39:46,013 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 90 flow [2023-08-04 09:39:46,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:46,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:46,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:46,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:46,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:46,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:46,219 INFO L85 PathProgramCache]: Analyzing trace with hash -455195227, now seen corresponding path program 1 times [2023-08-04 09:39:46,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:46,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093828914] [2023-08-04 09:39:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:46,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:46,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:46,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093828914] [2023-08-04 09:39:46,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093828914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:46,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801566740] [2023-08-04 09:39:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:46,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:46,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:46,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:46,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:39:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:46,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:46,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:46,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:46,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801566740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:46,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:46,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:46,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311254334] [2023-08-04 09:39:46,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:46,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:46,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:46,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:46,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 311 [2023-08-04 09:39:46,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:46,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 311 [2023-08-04 09:39:46,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:46,432 INFO L124 PetriNetUnfolderBase]: 6/15 cut-off events. [2023-08-04 09:39:46,432 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:46,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 15 events. 6/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 2/14 useless extension candidates. Maximal degree in co-relation 33. Up to 8 conditions per place. [2023-08-04 09:39:46,433 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 09:39:46,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 48 flow [2023-08-04 09:39:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2023-08-04 09:39:46,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43086816720257237 [2023-08-04 09:39:46,435 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2023-08-04 09:39:46,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2023-08-04 09:39:46,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:46,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2023-08-04 09:39:46,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,439 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,439 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 90 flow. Second operand 4 states and 536 transitions. [2023-08-04 09:39:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 48 flow [2023-08-04 09:39:46,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:46,440 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 09:39:46,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-04 09:39:46,441 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -13 predicate places. [2023-08-04 09:39:46,441 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 09:39:46,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:46,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:39:46,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:46,649 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 09:39:46,651 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:39:46,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:46,677 INFO L124 PetriNetUnfolderBase]: 40/308 cut-off events. [2023-08-04 09:39:46,677 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:39:46,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 308 events. 40/308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 996 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 09:39:46,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:46,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:46,679 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:46,679 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:46,680 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:46,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 09:39:46,700 INFO L124 PetriNetUnfolderBase]: 40/308 cut-off events. [2023-08-04 09:39:46,701 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:39:46,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 308 events. 40/308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 996 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 09:39:46,704 INFO L119 LiptonReduction]: Number of co-enabled transitions 3510 [2023-08-04 09:39:50,291 INFO L134 LiptonReduction]: Checked pairs total: 4122 [2023-08-04 09:39:50,291 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-04 09:39:50,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:39:50,294 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;@18f6c06c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:50,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:39:50,297 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:50,297 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2023-08-04 09:39:50,297 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:50,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:50,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:39:50,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:39:50,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash -939164348, now seen corresponding path program 1 times [2023-08-04 09:39:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129442378] [2023-08-04 09:39:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:39:50,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:39:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:39:50,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:39:50,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:39:50,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:39:50,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:39:50,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 09:39:50,347 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:39:50,348 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:39:50,349 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:39:50,349 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:39:50,368 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:39:50,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 09:39:50,455 INFO L124 PetriNetUnfolderBase]: 149/926 cut-off events. [2023-08-04 09:39:50,455 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:39:50,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 149/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4727 event pairs, 2 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-04 09:39:50,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 09:39:50,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 434 flow [2023-08-04 09:39:50,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:50,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 434 flow [2023-08-04 09:39:50,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 434 flow [2023-08-04 09:39:50,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 09:39:50,564 INFO L124 PetriNetUnfolderBase]: 149/926 cut-off events. [2023-08-04 09:39:50,564 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:39:50,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 149/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4727 event pairs, 2 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-04 09:39:50,592 INFO L119 LiptonReduction]: Number of co-enabled transitions 9396 [2023-08-04 09:39:54,527 INFO L134 LiptonReduction]: Checked pairs total: 13113 [2023-08-04 09:39:54,527 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-04 09:39:54,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:39:54,529 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;@18f6c06c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:54,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:39:54,532 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:54,532 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-04 09:39:54,532 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:54,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:54,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 09:39:54,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:54,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1678312902, now seen corresponding path program 1 times [2023-08-04 09:39:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:54,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708383840] [2023-08-04 09:39:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:39:54,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708383840] [2023-08-04 09:39:54,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708383840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:54,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:39:54,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:39:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571256465] [2023-08-04 09:39:54,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:54,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:54,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:54,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:39:54,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 374 [2023-08-04 09:39:54,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 140 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 09:39:54,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:54,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 374 [2023-08-04 09:39:54,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:55,470 INFO L124 PetriNetUnfolderBase]: 6283/8385 cut-off events. [2023-08-04 09:39:55,471 INFO L125 PetriNetUnfolderBase]: For 990/990 co-relation queries the response was YES. [2023-08-04 09:39:55,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17108 conditions, 8385 events. 6283/8385 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36942 event pairs, 2637 based on Foata normal form. 0/5162 useless extension candidates. Maximal degree in co-relation 6497. Up to 8089 conditions per place. [2023-08-04 09:39:55,527 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 39 selfloop transitions, 2 changer transitions 2/49 dead transitions. [2023-08-04 09:39:55,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 228 flow [2023-08-04 09:39:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-04 09:39:55,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554367201426025 [2023-08-04 09:39:55,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-04 09:39:55,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-04 09:39:55,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:55,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-04 09:39:55,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:55,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:55,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:55,534 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 140 flow. Second operand 3 states and 511 transitions. [2023-08-04 09:39:55,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 228 flow [2023-08-04 09:39:55,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:39:55,540 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 138 flow [2023-08-04 09:39:55,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-04 09:39:55,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 09:39:55,542 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 138 flow [2023-08-04 09:39:55,542 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 09:39:55,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:55,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:55,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:39:55,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:55,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:55,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2143747746, now seen corresponding path program 1 times [2023-08-04 09:39:55,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:55,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770016881] [2023-08-04 09:39:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:39:55,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:55,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770016881] [2023-08-04 09:39:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770016881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:55,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186243331] [2023-08-04 09:39:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:55,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:55,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:55,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:55,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:39:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:55,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:55,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:39:55,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:55,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186243331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:55,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:55,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:55,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929543100] [2023-08-04 09:39:55,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:55,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:55,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:55,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:55,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:55,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 374 [2023-08-04 09:39:55,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 138 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 09:39:55,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:55,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 374 [2023-08-04 09:39:55,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:56,388 INFO L124 PetriNetUnfolderBase]: 6311/8443 cut-off events. [2023-08-04 09:39:56,388 INFO L125 PetriNetUnfolderBase]: For 970/970 co-relation queries the response was YES. [2023-08-04 09:39:56,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17165 conditions, 8443 events. 6311/8443 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37512 event pairs, 2544 based on Foata normal form. 0/5201 useless extension candidates. Maximal degree in co-relation 17131. Up to 8042 conditions per place. [2023-08-04 09:39:56,450 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 09:39:56,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 250 flow [2023-08-04 09:39:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 09:39:56,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590017825311943 [2023-08-04 09:39:56,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 09:39:56,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 09:39:56,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:56,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 09:39:56,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:56,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:56,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:56,457 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 138 flow. Second operand 3 states and 515 transitions. [2023-08-04 09:39:56,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 250 flow [2023-08-04 09:39:56,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:39:56,462 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 142 flow [2023-08-04 09:39:56,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-08-04 09:39:56,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2023-08-04 09:39:56,464 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 142 flow [2023-08-04 09:39:56,464 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 09:39:56,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:56,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:56,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:56,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:56,678 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:56,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1345898327, now seen corresponding path program 1 times [2023-08-04 09:39:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87137096] [2023-08-04 09:39:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:56,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:39:56,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:56,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87137096] [2023-08-04 09:39:56,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87137096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:56,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804426854] [2023-08-04 09:39:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:56,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:56,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:56,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:56,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:39:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:56,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:56,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:39:56,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:56,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804426854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:56,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:56,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:39:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30773789] [2023-08-04 09:39:56,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:56,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:56,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:56,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 374 [2023-08-04 09:39:56,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:56,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:56,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 374 [2023-08-04 09:39:56,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:57,387 INFO L124 PetriNetUnfolderBase]: 5464/7487 cut-off events. [2023-08-04 09:39:57,388 INFO L125 PetriNetUnfolderBase]: For 471/471 co-relation queries the response was YES. [2023-08-04 09:39:57,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15399 conditions, 7487 events. 5464/7487 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 34863 event pairs, 2097 based on Foata normal form. 0/4849 useless extension candidates. Maximal degree in co-relation 6900. Up to 5378 conditions per place. [2023-08-04 09:39:57,431 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 53 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 09:39:57,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 294 flow [2023-08-04 09:39:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-04 09:39:57,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2023-08-04 09:39:57,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-04 09:39:57,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-04 09:39:57,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:57,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-04 09:39:57,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:57,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:57,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:57,437 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 142 flow. Second operand 3 states and 522 transitions. [2023-08-04 09:39:57,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 294 flow [2023-08-04 09:39:57,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:57,441 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 152 flow [2023-08-04 09:39:57,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-08-04 09:39:57,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 09:39:57,443 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 152 flow [2023-08-04 09:39:57,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:57,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:57,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:57,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:57,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:57,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash -949748999, now seen corresponding path program 1 times [2023-08-04 09:39:57,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949651749] [2023-08-04 09:39:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:39:57,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:57,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949651749] [2023-08-04 09:39:57,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949651749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:57,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116109642] [2023-08-04 09:39:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:57,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:57,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:39:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:57,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:57,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:57,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:57,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116109642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:57,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:57,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:39:57,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825103859] [2023-08-04 09:39:57,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:57,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:57,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:57,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:57,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 374 [2023-08-04 09:39:57,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:57,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:57,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 374 [2023-08-04 09:39:57,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:58,341 INFO L124 PetriNetUnfolderBase]: 5393/7440 cut-off events. [2023-08-04 09:39:58,342 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2023-08-04 09:39:58,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15989 conditions, 7440 events. 5393/7440 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 34180 event pairs, 2312 based on Foata normal form. 0/5081 useless extension candidates. Maximal degree in co-relation 7495. Up to 5601 conditions per place. [2023-08-04 09:39:58,380 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 09:39:58,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 306 flow [2023-08-04 09:39:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-04 09:39:58,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2023-08-04 09:39:58,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-04 09:39:58,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-04 09:39:58,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:58,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-04 09:39:58,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:58,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:58,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:58,386 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 152 flow. Second operand 3 states and 522 transitions. [2023-08-04 09:39:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 306 flow [2023-08-04 09:39:58,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:58,393 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 162 flow [2023-08-04 09:39:58,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-04 09:39:58,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-08-04 09:39:58,394 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 162 flow [2023-08-04 09:39:58,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:58,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:58,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:58,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:58,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:58,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:58,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1411486808, now seen corresponding path program 1 times [2023-08-04 09:39:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:58,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024966079] [2023-08-04 09:39:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:58,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:58,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024966079] [2023-08-04 09:39:58,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024966079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:58,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673375393] [2023-08-04 09:39:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:58,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:58,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:58,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:39:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:58,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:58,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:58,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:39:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673375393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:58,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:58,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:58,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835028236] [2023-08-04 09:39:58,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:58,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:58,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:58,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 374 [2023-08-04 09:39:58,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:58,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:58,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 374 [2023-08-04 09:39:58,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:59,290 INFO L124 PetriNetUnfolderBase]: 4706/6455 cut-off events. [2023-08-04 09:39:59,290 INFO L125 PetriNetUnfolderBase]: For 1354/1354 co-relation queries the response was YES. [2023-08-04 09:39:59,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14115 conditions, 6455 events. 4706/6455 cut-off events. For 1354/1354 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28733 event pairs, 1637 based on Foata normal form. 2/4453 useless extension candidates. Maximal degree in co-relation 8936. Up to 6179 conditions per place. [2023-08-04 09:39:59,325 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 45 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 09:39:59,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 276 flow [2023-08-04 09:39:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 667 transitions. [2023-08-04 09:39:59,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44585561497326204 [2023-08-04 09:39:59,328 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 667 transitions. [2023-08-04 09:39:59,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 667 transitions. [2023-08-04 09:39:59,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:59,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 667 transitions. [2023-08-04 09:39:59,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:59,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:59,332 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:59,333 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 162 flow. Second operand 4 states and 667 transitions. [2023-08-04 09:39:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 276 flow [2023-08-04 09:39:59,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:59,347 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 174 flow [2023-08-04 09:39:59,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-08-04 09:39:59,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-08-04 09:39:59,349 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 174 flow [2023-08-04 09:39:59,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:59,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:59,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:59,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 09:39:59,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:59,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1420797495, now seen corresponding path program 1 times [2023-08-04 09:39:59,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:59,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110734145] [2023-08-04 09:39:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:39:59,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:59,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110734145] [2023-08-04 09:39:59,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110734145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:59,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560987620] [2023-08-04 09:39:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:59,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:59,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:59,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:59,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:39:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:59,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:59,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:39:59,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:39:59,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560987620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:59,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:59,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:59,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189343900] [2023-08-04 09:39:59,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:59,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:59,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:59,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:59,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:59,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 374 [2023-08-04 09:39:59,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:59,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:59,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 374 [2023-08-04 09:39:59,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:00,207 INFO L124 PetriNetUnfolderBase]: 4554/6283 cut-off events. [2023-08-04 09:40:00,208 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2023-08-04 09:40:00,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13626 conditions, 6283 events. 4554/6283 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28383 event pairs, 1057 based on Foata normal form. 16/4351 useless extension candidates. Maximal degree in co-relation 8511. Up to 5218 conditions per place. [2023-08-04 09:40:00,252 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 56 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 09:40:00,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 332 flow [2023-08-04 09:40:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:40:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:40:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 678 transitions. [2023-08-04 09:40:00,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532085561497326 [2023-08-04 09:40:00,255 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 678 transitions. [2023-08-04 09:40:00,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 678 transitions. [2023-08-04 09:40:00,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:00,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 678 transitions. [2023-08-04 09:40:00,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:00,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:00,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:00,259 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 174 flow. Second operand 4 states and 678 transitions. [2023-08-04 09:40:00,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 332 flow [2023-08-04 09:40:00,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 323 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:40:00,273 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 179 flow [2023-08-04 09:40:00,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-08-04 09:40:00,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-04 09:40:00,274 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 179 flow [2023-08-04 09:40:00,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:00,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:00,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:00,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:40:00,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:00,480 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:00,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash -469650773, now seen corresponding path program 1 times [2023-08-04 09:40:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:00,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579641746] [2023-08-04 09:40:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:00,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:40:00,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:00,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579641746] [2023-08-04 09:40:00,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579641746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:00,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952487872] [2023-08-04 09:40:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:00,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:00,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:00,526 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:00,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:40:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:00,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:40:00,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:40:00,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:40:00,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952487872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:00,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:00,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:40:00,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638818989] [2023-08-04 09:40:00,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:00,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:40:00,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:00,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:40:00,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:00,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 374 [2023-08-04 09:40:00,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:00,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:00,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 374 [2023-08-04 09:40:00,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:00,973 INFO L124 PetriNetUnfolderBase]: 3004/4197 cut-off events. [2023-08-04 09:40:00,973 INFO L125 PetriNetUnfolderBase]: For 1063/1063 co-relation queries the response was YES. [2023-08-04 09:40:00,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9162 conditions, 4197 events. 3004/4197 cut-off events. For 1063/1063 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17646 event pairs, 583 based on Foata normal form. 96/2991 useless extension candidates. Maximal degree in co-relation 7871. Up to 1527 conditions per place. [2023-08-04 09:40:00,990 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 63 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-08-04 09:40:00,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 374 flow [2023-08-04 09:40:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:40:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:40:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 685 transitions. [2023-08-04 09:40:00,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45788770053475936 [2023-08-04 09:40:00,993 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 685 transitions. [2023-08-04 09:40:00,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 685 transitions. [2023-08-04 09:40:00,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:00,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 685 transitions. [2023-08-04 09:40:00,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:00,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:00,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:00,997 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 179 flow. Second operand 4 states and 685 transitions. [2023-08-04 09:40:00,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 374 flow [2023-08-04 09:40:01,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 364 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:40:01,004 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 190 flow [2023-08-04 09:40:01,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-04 09:40:01,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-04 09:40:01,004 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 190 flow [2023-08-04 09:40:01,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:01,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:01,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:01,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:40:01,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:40:01,210 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:01,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash -469933923, now seen corresponding path program 1 times [2023-08-04 09:40:01,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:01,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384954416] [2023-08-04 09:40:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:40:01,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:01,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384954416] [2023-08-04 09:40:01,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384954416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:01,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096679105] [2023-08-04 09:40:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:01,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:01,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:01,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:40:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:01,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:40:01,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:40:01,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:40:01,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096679105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:01,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:01,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:40:01,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234338013] [2023-08-04 09:40:01,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:01,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:40:01,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:01,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:40:01,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:01,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 374 [2023-08-04 09:40:01,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:01,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:01,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 374 [2023-08-04 09:40:01,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:01,755 INFO L124 PetriNetUnfolderBase]: 2990/4172 cut-off events. [2023-08-04 09:40:01,755 INFO L125 PetriNetUnfolderBase]: For 1888/1888 co-relation queries the response was YES. [2023-08-04 09:40:01,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9654 conditions, 4172 events. 2990/4172 cut-off events. For 1888/1888 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17378 event pairs, 1487 based on Foata normal form. 13/2889 useless extension candidates. Maximal degree in co-relation 8370. Up to 3444 conditions per place. [2023-08-04 09:40:01,776 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 63 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2023-08-04 09:40:01,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 386 flow [2023-08-04 09:40:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:40:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:40:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 685 transitions. [2023-08-04 09:40:01,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45788770053475936 [2023-08-04 09:40:01,779 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 685 transitions. [2023-08-04 09:40:01,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 685 transitions. [2023-08-04 09:40:01,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:01,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 685 transitions. [2023-08-04 09:40:01,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:01,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:01,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:01,783 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 190 flow. Second operand 4 states and 685 transitions. [2023-08-04 09:40:01,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 386 flow [2023-08-04 09:40:01,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:40:01,794 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 194 flow [2023-08-04 09:40:01,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-04 09:40:01,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2023-08-04 09:40:01,794 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 194 flow [2023-08-04 09:40:01,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:01,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:01,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:01,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:40:02,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:40:02,000 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:02,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1758669135, now seen corresponding path program 1 times [2023-08-04 09:40:02,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:02,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333303193] [2023-08-04 09:40:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:02,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 09:40:02,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:02,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333303193] [2023-08-04 09:40:02,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333303193] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:02,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:40:02,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 09:40:02,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352392753] [2023-08-04 09:40:02,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:02,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:40:02,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:40:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:40:02,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 374 [2023-08-04 09:40:02,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:02,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 374 [2023-08-04 09:40:02,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:02,692 INFO L124 PetriNetUnfolderBase]: 5536/7625 cut-off events. [2023-08-04 09:40:02,692 INFO L125 PetriNetUnfolderBase]: For 3118/3118 co-relation queries the response was YES. [2023-08-04 09:40:02,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17556 conditions, 7625 events. 5536/7625 cut-off events. For 3118/3118 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 35061 event pairs, 2666 based on Foata normal form. 1/5199 useless extension candidates. Maximal degree in co-relation 17226. Up to 4190 conditions per place. [2023-08-04 09:40:02,724 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 73 selfloop transitions, 3 changer transitions 1/83 dead transitions. [2023-08-04 09:40:02,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 510 flow [2023-08-04 09:40:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:40:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:40:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-04 09:40:02,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875222816399287 [2023-08-04 09:40:02,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-04 09:40:02,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-04 09:40:02,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:02,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-04 09:40:02,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,730 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 194 flow. Second operand 3 states and 547 transitions. [2023-08-04 09:40:02,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 510 flow [2023-08-04 09:40:02,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 494 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:40:02,762 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 205 flow [2023-08-04 09:40:02,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-04 09:40:02,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2023-08-04 09:40:02,763 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 205 flow [2023-08-04 09:40:02,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:02,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:02,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 09:40:02,763 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:02,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:02,764 INFO L85 PathProgramCache]: Analyzing trace with hash 519343863, now seen corresponding path program 1 times [2023-08-04 09:40:02,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:02,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573968039] [2023-08-04 09:40:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:02,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:40:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573968039] [2023-08-04 09:40:02,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573968039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:02,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:40:02,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:40:02,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406246853] [2023-08-04 09:40:02,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:02,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:40:02,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:02,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:40:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:40:02,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 374 [2023-08-04 09:40:02,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:02,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 374 [2023-08-04 09:40:02,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:03,556 INFO L124 PetriNetUnfolderBase]: 6443/8868 cut-off events. [2023-08-04 09:40:03,557 INFO L125 PetriNetUnfolderBase]: For 5397/5397 co-relation queries the response was YES. [2023-08-04 09:40:03,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22279 conditions, 8868 events. 6443/8868 cut-off events. For 5397/5397 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 44344 event pairs, 1430 based on Foata normal form. 395/7823 useless extension candidates. Maximal degree in co-relation 21824. Up to 7080 conditions per place. [2023-08-04 09:40:03,612 INFO L140 encePairwiseOnDemand]: 369/374 looper letters, 62 selfloop transitions, 3 changer transitions 6/77 dead transitions. [2023-08-04 09:40:03,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 463 flow [2023-08-04 09:40:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:40:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:40:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-04 09:40:03,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46880570409982175 [2023-08-04 09:40:03,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-04 09:40:03,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-04 09:40:03,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:03,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-04 09:40:03,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:03,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:03,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:03,618 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 205 flow. Second operand 3 states and 526 transitions. [2023-08-04 09:40:03,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 463 flow [2023-08-04 09:40:03,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:40:03,637 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 223 flow [2023-08-04 09:40:03,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-08-04 09:40:03,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2023-08-04 09:40:03,638 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 223 flow [2023-08-04 09:40:03,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:03,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:03,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:03,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 09:40:03,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:03,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:03,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1131206680, now seen corresponding path program 1 times [2023-08-04 09:40:03,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:03,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953103419] [2023-08-04 09:40:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:03,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:40:04,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:04,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953103419] [2023-08-04 09:40:04,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953103419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:04,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360035371] [2023-08-04 09:40:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:04,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:04,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:04,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:04,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:40:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:04,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 09:40:04,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:40:04,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:40:04,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360035371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:04,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:40:04,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 17 [2023-08-04 09:40:04,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375899055] [2023-08-04 09:40:04,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:04,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:40:04,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:40:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2023-08-04 09:40:04,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 374 [2023-08-04 09:40:04,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:04,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:04,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 374 [2023-08-04 09:40:04,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:05,696 INFO L124 PetriNetUnfolderBase]: 7933/11632 cut-off events. [2023-08-04 09:40:05,696 INFO L125 PetriNetUnfolderBase]: For 8146/8146 co-relation queries the response was YES. [2023-08-04 09:40:05,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30108 conditions, 11632 events. 7933/11632 cut-off events. For 8146/8146 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 65593 event pairs, 5299 based on Foata normal form. 290/10289 useless extension candidates. Maximal degree in co-relation 29428. Up to 8526 conditions per place. [2023-08-04 09:40:05,733 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 44 selfloop transitions, 2 changer transitions 35/87 dead transitions. [2023-08-04 09:40:05,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 550 flow [2023-08-04 09:40:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:40:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:40:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 687 transitions. [2023-08-04 09:40:05,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592245989304813 [2023-08-04 09:40:05,736 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 687 transitions. [2023-08-04 09:40:05,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 687 transitions. [2023-08-04 09:40:05,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:05,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 687 transitions. [2023-08-04 09:40:05,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:05,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:05,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:05,740 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 223 flow. Second operand 4 states and 687 transitions. [2023-08-04 09:40:05,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 550 flow [2023-08-04 09:40:05,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:40:05,800 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 238 flow [2023-08-04 09:40:05,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2023-08-04 09:40:05,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2023-08-04 09:40:05,801 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 238 flow [2023-08-04 09:40:05,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:05,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:05,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:05,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:40:06,009 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,SelfDestructingSolverStorable16 [2023-08-04 09:40:06,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:06,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:06,010 INFO L85 PathProgramCache]: Analyzing trace with hash 944965269, now seen corresponding path program 1 times [2023-08-04 09:40:06,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:06,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132496289] [2023-08-04 09:40:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:06,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:40:06,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:06,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132496289] [2023-08-04 09:40:06,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132496289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:06,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976758098] [2023-08-04 09:40:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:06,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:06,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:06,872 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:06,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:40:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:06,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 09:40:06,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:07,072 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 09:40:07,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:40:07,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:40:07,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:40:07,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:40:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:40:07,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:08,924 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:08,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:40:08,938 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:08,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-08-04 09:40:08,947 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:08,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 116 [2023-08-04 09:40:08,959 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:08,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2023-08-04 09:40:09,219 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:09,219 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:40:09,234 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 09:40:09,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 288 [2023-08-04 09:40:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:40:09,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-08-04 09:40:09,269 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 09:40:09,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 75 [2023-08-04 09:40:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 6 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:40:09,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976758098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:09,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-04 09:40:09,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877217443] [2023-08-04 09:40:09,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:09,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-04 09:40:09,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-04 09:40:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=478, Unknown=10, NotChecked=0, Total=600 [2023-08-04 09:40:09,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 374 [2023-08-04 09:40:09,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 238 flow. Second operand has 25 states, 25 states have (on average 119.6) internal successors, (2990), 25 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:09,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:09,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 374 [2023-08-04 09:40:09,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:26,520 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 125 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 09:40:44,864 INFO L124 PetriNetUnfolderBase]: 42940/60542 cut-off events. [2023-08-04 09:40:44,865 INFO L125 PetriNetUnfolderBase]: For 54082/54082 co-relation queries the response was YES. [2023-08-04 09:40:45,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166611 conditions, 60542 events. 42940/60542 cut-off events. For 54082/54082 co-relation queries the response was YES. Maximal size of possible extension queue 1801. Compared 400264 event pairs, 4837 based on Foata normal form. 1022/58003 useless extension candidates. Maximal degree in co-relation 166585. Up to 10854 conditions per place. [2023-08-04 09:40:45,214 INFO L140 encePairwiseOnDemand]: 361/374 looper letters, 792 selfloop transitions, 158 changer transitions 152/1107 dead transitions. [2023-08-04 09:40:45,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 1107 transitions, 7201 flow [2023-08-04 09:40:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-04 09:40:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-04 09:40:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7056 transitions. [2023-08-04 09:40:45,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36281365693130396 [2023-08-04 09:40:45,230 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7056 transitions. [2023-08-04 09:40:45,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7056 transitions. [2023-08-04 09:40:45,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:45,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7056 transitions. [2023-08-04 09:40:45,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 135.69230769230768) internal successors, (7056), 52 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:45,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 374.0) internal successors, (19822), 53 states have internal predecessors, (19822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:45,281 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 374.0) internal successors, (19822), 53 states have internal predecessors, (19822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:45,281 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 238 flow. Second operand 52 states and 7056 transitions. [2023-08-04 09:40:45,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 1107 transitions, 7201 flow [2023-08-04 09:40:45,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 1107 transitions, 7197 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:40:45,894 INFO L231 Difference]: Finished difference. Result has 143 places, 232 transitions, 1715 flow [2023-08-04 09:40:45,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1715, PETRI_PLACES=143, PETRI_TRANSITIONS=232} [2023-08-04 09:40:45,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2023-08-04 09:40:45,895 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 232 transitions, 1715 flow [2023-08-04 09:40:45,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 119.6) internal successors, (2990), 25 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:45,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:45,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:45,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:40:46,097 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,SelfDestructingSolverStorable17 [2023-08-04 09:40:46,098 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:46,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1991826004, now seen corresponding path program 1 times [2023-08-04 09:40:46,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:46,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102395068] [2023-08-04 09:40:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:46,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:40:46,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:46,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102395068] [2023-08-04 09:40:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102395068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:46,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200613802] [2023-08-04 09:40:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:46,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:46,746 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:46,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:40:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:46,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 09:40:46,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:46,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 09:40:47,020 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:40:47,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:40:47,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:40:47,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:40:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:40:47,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:48,846 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:48,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:40:48,858 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:48,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 292 [2023-08-04 09:40:48,879 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:48,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2023-08-04 09:40:48,891 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:48,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 79 [2023-08-04 09:40:49,116 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:40:49,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:40:49,128 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 09:40:49,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 288 [2023-08-04 09:40:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:40:49,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-08-04 09:40:49,154 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 09:40:49,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 75 [2023-08-04 09:40:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 5 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:40:49,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200613802] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:49,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:49,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-04 09:40:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130644346] [2023-08-04 09:40:49,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:49,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-04 09:40:49,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:49,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-04 09:40:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=530, Unknown=8, NotChecked=0, Total=650 [2023-08-04 09:40:50,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 374 [2023-08-04 09:40:50,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 232 transitions, 1715 flow. Second operand has 26 states, 26 states have (on average 105.57692307692308) internal successors, (2745), 26 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:50,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:50,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 374 [2023-08-04 09:40:50,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:07,429 WARN L233 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 100 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 09:41:41,590 INFO L124 PetriNetUnfolderBase]: 70503/98198 cut-off events. [2023-08-04 09:41:41,590 INFO L125 PetriNetUnfolderBase]: For 1024443/1024449 co-relation queries the response was YES. [2023-08-04 09:41:42,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417110 conditions, 98198 events. 70503/98198 cut-off events. For 1024443/1024449 co-relation queries the response was YES. Maximal size of possible extension queue 2402. Compared 635539 event pairs, 1733 based on Foata normal form. 267/98392 useless extension candidates. Maximal degree in co-relation 410285. Up to 32107 conditions per place. [2023-08-04 09:41:42,725 INFO L140 encePairwiseOnDemand]: 353/374 looper letters, 1239 selfloop transitions, 479 changer transitions 256/1982 dead transitions. [2023-08-04 09:41:42,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1982 transitions, 18025 flow [2023-08-04 09:41:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-08-04 09:41:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2023-08-04 09:41:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 11833 transitions. [2023-08-04 09:41:42,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30132416603004836 [2023-08-04 09:41:42,741 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 11833 transitions. [2023-08-04 09:41:42,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 11833 transitions. [2023-08-04 09:41:42,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:42,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 11833 transitions. [2023-08-04 09:41:42,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 112.6952380952381) internal successors, (11833), 105 states have internal predecessors, (11833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:42,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 374.0) internal successors, (39644), 106 states have internal predecessors, (39644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:42,810 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 374.0) internal successors, (39644), 106 states have internal predecessors, (39644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:42,810 INFO L175 Difference]: Start difference. First operand has 143 places, 232 transitions, 1715 flow. Second operand 105 states and 11833 transitions. [2023-08-04 09:41:42,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1982 transitions, 18025 flow [2023-08-04 09:41:52,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1982 transitions, 16627 flow, removed 698 selfloop flow, removed 1 redundant places. [2023-08-04 09:41:52,881 INFO L231 Difference]: Finished difference. Result has 268 places, 723 transitions, 6180 flow [2023-08-04 09:41:52,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=6180, PETRI_PLACES=268, PETRI_TRANSITIONS=723} [2023-08-04 09:41:52,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2023-08-04 09:41:52,882 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 723 transitions, 6180 flow [2023-08-04 09:41:52,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.57692307692308) internal successors, (2745), 26 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:52,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:52,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:52,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 09:41:53,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:53,084 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:53,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:53,084 INFO L85 PathProgramCache]: Analyzing trace with hash -369323535, now seen corresponding path program 2 times [2023-08-04 09:41:53,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:53,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895164011] [2023-08-04 09:41:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:53,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:41:53,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:53,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895164011] [2023-08-04 09:41:53,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895164011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:53,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376333760] [2023-08-04 09:41:53,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:41:53,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:53,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:53,491 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:41:53,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:41:53,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:41:53,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:41:53,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 09:41:53,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:53,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 09:41:53,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:41:53,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:41:53,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:41:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:41:54,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-04 09:41:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:41:54,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:41:55,215 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:41:55,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:41:55,227 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:41:55,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-08-04 09:41:55,243 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:41:55,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 97 [2023-08-04 09:41:55,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:41:55,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-08-04 09:41:55,430 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:41:55,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:41:55,434 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 09:41:55,442 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 09:41:55,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-08-04 09:41:55,464 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 09:41:55,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-04 09:41:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:41:55,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376333760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:41:55,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:41:55,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 22 [2023-08-04 09:41:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443948607] [2023-08-04 09:41:55,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:41:55,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 09:41:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 09:41:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=417, Unknown=10, NotChecked=0, Total=552 [2023-08-04 09:41:56,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 374 [2023-08-04 09:41:56,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 723 transitions, 6180 flow. Second operand has 24 states, 24 states have (on average 120.66666666666667) internal successors, (2896), 24 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:56,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:56,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 374 [2023-08-04 09:41:56,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:42:00,477 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int| c_~queue~0.base)) (.cse12 (+ c_~queue~0.offset (* c_~back~0 4)))) (let ((.cse4 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse10 (select .cse3 .cse12))) (let ((.cse9 (not (= .cse10 1))) (.cse6 (<= (+ c_~back~0 1) c_~front~0)) (.cse7 (and (forall ((v_ArrVal_529 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_529) c_~queue~0.base) .cse4)))) (forall ((v_ArrVal_529 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_529) c_~queue~0.base) .cse4)) 1)))) (.cse0 (<= c_~n~0 c_~front~0)) (.cse1 (<= c_~back~0 c_~front~0)) (.cse5 (< c_~front~0 0))) (and (<= 1 c_~sum~0) (or .cse0 .cse1 (let ((.cse2 (+ c_~sum~0 (select .cse3 .cse4)))) (and (<= .cse2 1) (<= 0 .cse2))) .cse5) (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse0 .cse6 (and (<= c_~sum~0 0) (<= 0 (+ c_~sum~0 1)) (= c_~back~0 c_~front~0) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) .cse5) (or .cse7 .cse0 (let ((.cse8 (= (mod |c_thread2Thread1of2ForFork0_~b~0#1| 256) 0))) (and (or .cse6 .cse8 .cse9) (or (not .cse8) .cse6 (not (= (+ .cse10 1) 0))))) .cse5) (or .cse7 .cse0 .cse6 .cse5 .cse9) (or .cse0 .cse6 (and (forall ((v_ArrVal_528 (Array Int Int)) (v_ArrVal_527 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_527))) (or (forall ((v_ArrVal_529 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store .cse11 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_529) c_~queue~0.base) .cse4)) 1)) (not (= (select (select (store .cse11 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_528) c_~queue~0.base) .cse12) 1))))) (forall ((v_ArrVal_528 (Array Int Int)) (v_ArrVal_527 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_527))) (or (forall ((v_ArrVal_529 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store .cse13 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_529) c_~queue~0.base) .cse4)))) (not (= (select (select (store .cse13 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_528) c_~queue~0.base) .cse12) 1)))))) .cse5) (<= c_~sum~0 1) (or .cse7 .cse0 .cse6 .cse5 (forall ((v_ArrVal_528 (Array Int Int))) (not (= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_528) c_~queue~0.base) .cse12))))) (or .cse7 .cse0 .cse1 .cse5))))) is different from false [2023-08-04 09:42:00,604 WARN L839 $PredicateComparison]: unable to prove that (and (<= 1 c_~sum~0) (or (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_529 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_529) c_~queue~0.base) .cse0)))) (forall ((v_ArrVal_529 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_529) c_~queue~0.base) .cse0)) 1)))) (<= c_~n~0 c_~front~0) (let ((.cse2 (= (mod |c_thread2Thread1of2ForFork0_~b~0#1| 256) 0)) (.cse1 (<= (+ c_~back~0 1) c_~front~0)) (.cse3 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))))) (and (or .cse1 .cse2 (not (= .cse3 1))) (or (not .cse2) .cse1 (not (= (+ .cse3 1) 0))))) (< c_~front~0 0)) (<= c_~sum~0 1)) is different from false [2023-08-04 09:42:09,680 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 70 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 09:42:39,470 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse0 (<= c_~n~0 c_~front~0)) (.cse1 (<= c_~back~0 c_~front~0)) (.cse4 (< c_~front~0 0))) (and (or .cse0 .cse1 (let ((.cse2 (+ c_~sum~0 (select (select |c_#memory_int| c_~queue~0.base) .cse3)))) (and (<= .cse2 1) (<= 0 .cse2))) .cse4) (or (and (forall ((v_ArrVal_529 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_529) c_~queue~0.base) .cse3)))) (forall ((v_ArrVal_529 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_529) c_~queue~0.base) .cse3)) 1))) .cse0 .cse1 .cse4))) is different from false [2023-08-04 09:42:39,533 INFO L124 PetriNetUnfolderBase]: 121796/172080 cut-off events. [2023-08-04 09:42:39,533 INFO L125 PetriNetUnfolderBase]: For 2215772/2216072 co-relation queries the response was YES. [2023-08-04 09:42:42,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760623 conditions, 172080 events. 121796/172080 cut-off events. For 2215772/2216072 co-relation queries the response was YES. Maximal size of possible extension queue 4298. Compared 1243342 event pairs, 14645 based on Foata normal form. 89/171786 useless extension candidates. Maximal degree in co-relation 758738. Up to 63378 conditions per place. [2023-08-04 09:42:42,908 INFO L140 encePairwiseOnDemand]: 343/374 looper letters, 922 selfloop transitions, 554 changer transitions 66/1600 dead transitions. [2023-08-04 09:42:42,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1600 transitions, 15523 flow [2023-08-04 09:42:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-04 09:42:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-04 09:42:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3587 transitions. [2023-08-04 09:42:42,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688811188811189 [2023-08-04 09:42:42,913 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3587 transitions. [2023-08-04 09:42:42,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3587 transitions. [2023-08-04 09:42:42,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:42:42,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3587 transitions. [2023-08-04 09:42:42,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 137.96153846153845) internal successors, (3587), 26 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:42,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 374.0) internal successors, (10098), 27 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:42,926 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 374.0) internal successors, (10098), 27 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:42,926 INFO L175 Difference]: Start difference. First operand has 268 places, 723 transitions, 6180 flow. Second operand 26 states and 3587 transitions. [2023-08-04 09:42:42,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 1600 transitions, 15523 flow [2023-08-04 09:43:37,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 1600 transitions, 14674 flow, removed 356 selfloop flow, removed 11 redundant places. [2023-08-04 09:43:37,291 INFO L231 Difference]: Finished difference. Result has 290 places, 1040 transitions, 9851 flow [2023-08-04 09:43:37,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9851, PETRI_PLACES=290, PETRI_TRANSITIONS=1040} [2023-08-04 09:43:37,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2023-08-04 09:43:37,292 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 1040 transitions, 9851 flow [2023-08-04 09:43:37,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 120.66666666666667) internal successors, (2896), 24 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:37,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:43:37,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:43:37,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 09:43:37,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:43:37,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:43:37,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:43:37,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1146769775, now seen corresponding path program 1 times [2023-08-04 09:43:37,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:43:37,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582517324] [2023-08-04 09:43:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:43:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:43:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:43:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:43:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:43:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582517324] [2023-08-04 09:43:38,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582517324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:43:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894387645] [2023-08-04 09:43:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:43:38,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:43:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:43:38,085 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:43:38,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:43:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:43:38,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-04 09:43:38,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:43:38,262 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-04 09:43:38,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:43:38,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:43:38,443 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 09:43:38,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 09:43:38,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 09:43:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:43:38,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:43:39,923 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:43:39,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:43:39,935 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:43:39,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-08-04 09:43:39,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2023-08-04 09:43:39,960 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:43:39,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 85 [2023-08-04 09:43:39,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:43:40,096 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:43:40,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 09:43:40,101 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 09:43:40,108 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 09:43:40,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-08-04 09:43:40,119 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 09:43:40,119 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-04 09:43:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:43:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894387645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:43:40,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:43:40,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 28 [2023-08-04 09:43:40,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497053599] [2023-08-04 09:43:40,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:43:40,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-04 09:43:40,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:43:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-04 09:43:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=684, Unknown=15, NotChecked=0, Total=812 [2023-08-04 09:43:41,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 374 [2023-08-04 09:43:41,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 1040 transitions, 9851 flow. Second operand has 29 states, 29 states have (on average 104.24137931034483) internal successors, (3023), 29 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:41,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:43:41,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 374 [2023-08-04 09:43:41,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:43:49,695 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_thread1Thread2of2ForFork1_thidvar0 1)) (.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0))) (and (= |c_ULTIMATE.start_main_~#t2~0#1.offset| 0) (<= .cse0 .cse1) (or (<= c_~n~0 c_~front~0) (<= (+ c_~back~0 1) c_~front~0) (let ((.cse2 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_573 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_573) c_~queue~0.base) .cse2)) 1)) (forall ((v_ArrVal_573 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_573) c_~queue~0.base) .cse2)))))) (< c_~front~0 0) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))) (<= 0 c_~sum~0) (<= c_~sum~0 1) (= |c_ULTIMATE.start_main_~asdf~1#1| 0) (<= .cse1 .cse0))) is different from false [2023-08-04 09:43:56,301 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_thread1Thread2of2ForFork1_thidvar0 1)) (.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0))) (and (or (<= c_~n~0 c_~front~0) (<= c_~back~0 c_~front~0) (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_573 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_573) c_~queue~0.base) .cse0)) 1)) (forall ((v_ArrVal_573 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_573) c_~queue~0.base) .cse0)))))) (< c_~front~0 0)) (= |c_ULTIMATE.start_main_~#t2~0#1.offset| 0) (<= .cse1 .cse2) (<= 0 c_~sum~0) (<= c_~sum~0 1) (= |c_ULTIMATE.start_main_~asdf~1#1| 0) (<= .cse2 .cse1))) is different from false [2023-08-04 09:44:11,723 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_thread1Thread2of2ForFork1_thidvar0 1)) (.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0))) (and (or (<= c_~n~0 c_~front~0) (<= c_~back~0 c_~front~0) (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_573 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_573) c_~queue~0.base) .cse0)) 1)) (forall ((v_ArrVal_573 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_573) c_~queue~0.base) .cse0)))))) (< c_~front~0 0)) (= |c_ULTIMATE.start_main_~#t2~0#1.offset| 0) (<= .cse1 .cse2) (<= 0 c_~sum~0) (<= c_~sum~0 1) (<= .cse2 .cse1))) is different from false [2023-08-04 09:45:05,413 WARN L233 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 85 DAG size of output: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)