/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:41:14,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:41:14,124 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 11:41:14,128 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:41:14,129 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:41:14,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:41:14,149 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:41:14,150 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:41:14,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:41:14,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:41:14,151 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:41:14,151 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:41:14,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:41:14,152 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:41:14,152 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:41:14,153 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:41:14,153 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:41:14,153 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:41:14,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:41:14,154 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:41:14,154 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:41:14,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:41:14,155 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:41:14,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:41:14,156 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:41:14,156 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:41:14,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:41:14,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:41:14,157 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:41:14,157 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:41:14,157 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:41:14,157 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:41:14,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:41:14,158 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:41:14,158 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:41:14,158 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:41:14,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:41:14,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:41:14,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:41:14,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:41:14,498 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:41:14,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-26 11:41:15,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:41:16,109 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:41:16,110 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-26 11:41:16,129 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291809a38/e988ee6e63df4b98b71d3b127c5d603b/FLAG03ec48179 [2023-08-26 11:41:16,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291809a38/e988ee6e63df4b98b71d3b127c5d603b [2023-08-26 11:41:16,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:41:16,152 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:41:16,155 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:41:16,155 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:41:16,158 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:41:16,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@355302a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16, skipping insertion in model container [2023-08-26 11:41:16,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,208 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:41:16,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:41:16,555 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:41:16,569 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 11:41:16,571 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 11:41:16,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:41:16,610 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:16,610 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:16,616 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:41:16,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16 WrapperNode [2023-08-26 11:41:16,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:41:16,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:41:16,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:41:16,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:41:16,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,640 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,660 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-08-26 11:41:16,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:41:16,661 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:41:16,661 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:41:16,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:41:16,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,669 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,682 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:41:16,683 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:41:16,683 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:41:16,683 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:41:16,684 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (1/1) ... [2023-08-26 11:41:16,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:41:16,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:16,711 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) [2023-08-26 11:41:16,713 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 [2023-08-26 11:41:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 11:41:16,744 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 11:41:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 11:41:16,744 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 11:41:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:41:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 11:41:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:41:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:41:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:41:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:41:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 11:41:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:41:16,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:41:16,747 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 11:41:16,850 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:41:16,852 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:41:17,058 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:41:17,063 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:41:17,064 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:41:17,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:41:17 BoogieIcfgContainer [2023-08-26 11:41:17,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:41:17,068 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:41:17,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:41:17,072 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:41:17,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:41:16" (1/3) ... [2023-08-26 11:41:17,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3197483e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:41:17, skipping insertion in model container [2023-08-26 11:41:17,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:16" (2/3) ... [2023-08-26 11:41:17,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3197483e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:41:17, skipping insertion in model container [2023-08-26 11:41:17,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:41:17" (3/3) ... [2023-08-26 11:41:17,076 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-08-26 11:41:17,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:41:17,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 11:41:17,092 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:41:17,175 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:41:17,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 11:41:17,263 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 11:41:17,264 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:17,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 11:41:17,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 11:41:17,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:17,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:41:17,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:17,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:17,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:17,346 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 11:41:17,346 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:17,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 11:41:17,349 INFO L119 LiptonReduction]: Number of co-enabled transitions 1440 [2023-08-26 11:41:19,466 INFO L134 LiptonReduction]: Checked pairs total: 1354 [2023-08-26 11:41:19,466 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-26 11:41:19,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:41:19,482 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=false, 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;@62603529, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:41:19,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 11:41:19,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:41:19,483 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:41:19,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:19,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:19,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:41:19,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:19,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash 313, now seen corresponding path program 1 times [2023-08-26 11:41:19,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:19,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467447241] [2023-08-26 11:41:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:19,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:19,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467447241] [2023-08-26 11:41:19,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467447241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:19,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:19,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:41:19,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366726354] [2023-08-26 11:41:19,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:19,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:41:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:41:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:41:19,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 157 [2023-08-26 11:41:19,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:19,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 157 [2023-08-26 11:41:19,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:19,675 INFO L124 PetriNetUnfolderBase]: 76/125 cut-off events. [2023-08-26 11:41:19,676 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:41:19,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 125 events. 76/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 298 event pairs, 48 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 252. Up to 126 conditions per place. [2023-08-26 11:41:19,679 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 14 selfloop transitions, 0 changer transitions 1/15 dead transitions. [2023-08-26 11:41:19,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 11:41:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:41:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:41:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-26 11:41:19,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-08-26 11:41:19,693 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-26 11:41:19,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-26 11:41:19,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:19,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-26 11:41:19,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,708 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,710 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 42 flow. Second operand 2 states and 156 transitions. [2023-08-26 11:41:19,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 11:41:19,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:41:19,713 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 32 flow [2023-08-26 11:41:19,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-08-26 11:41:19,718 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:19,718 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 32 flow [2023-08-26 11:41:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:19,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:41:19,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:41:19,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:19,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 306362, now seen corresponding path program 1 times [2023-08-26 11:41:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663722988] [2023-08-26 11:41:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:19,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:19,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663722988] [2023-08-26 11:41:19,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663722988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:19,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:19,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:41:19,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395136709] [2023-08-26 11:41:19,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:19,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:41:19,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:41:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:41:19,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 157 [2023-08-26 11:41:19,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:19,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 157 [2023-08-26 11:41:19,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:19,959 INFO L124 PetriNetUnfolderBase]: 55/92 cut-off events. [2023-08-26 11:41:19,960 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:19,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 92 events. 55/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 34 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 192. Up to 92 conditions per place. [2023-08-26 11:41:19,961 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 11:41:19,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 56 flow [2023-08-26 11:41:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:41:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:41:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 11:41:19,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39278131634819535 [2023-08-26 11:41:19,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 11:41:19,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 11:41:19,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:19,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 11:41:19,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,970 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 32 flow. Second operand 3 states and 185 transitions. [2023-08-26 11:41:19,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 56 flow [2023-08-26 11:41:19,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 13 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:19,971 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 32 flow [2023-08-26 11:41:19,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=13} [2023-08-26 11:41:19,972 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:19,972 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 32 flow [2023-08-26 11:41:19,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:19,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:41:19,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:41:19,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:19,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:19,987 INFO L85 PathProgramCache]: Analyzing trace with hash 306361, now seen corresponding path program 1 times [2023-08-26 11:41:19,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:19,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298375383] [2023-08-26 11:41:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:20,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:20,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298375383] [2023-08-26 11:41:20,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298375383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:20,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:20,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:41:20,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229920381] [2023-08-26 11:41:20,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:20,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:41:20,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:20,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:41:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:41:20,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 157 [2023-08-26 11:41:20,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:20,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 157 [2023-08-26 11:41:20,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:20,097 INFO L124 PetriNetUnfolderBase]: 52/86 cut-off events. [2023-08-26 11:41:20,097 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:20,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 86 events. 52/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 32 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 181. Up to 86 conditions per place. [2023-08-26 11:41:20,103 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 11:41:20,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 54 flow [2023-08-26 11:41:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:41:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:41:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-08-26 11:41:20,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791932059447986 [2023-08-26 11:41:20,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-08-26 11:41:20,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-08-26 11:41:20,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:20,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-08-26 11:41:20,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,108 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 3 states and 178 transitions. [2023-08-26 11:41:20,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 54 flow [2023-08-26 11:41:20,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 12 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:41:20,109 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 31 flow [2023-08-26 11:41:20,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-08-26 11:41:20,110 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:20,110 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 31 flow [2023-08-26 11:41:20,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:20,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:41:20,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:41:20,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:20,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash 537039974, now seen corresponding path program 1 times [2023-08-26 11:41:20,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:20,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748252544] [2023-08-26 11:41:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:20,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748252544] [2023-08-26 11:41:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748252544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:20,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:20,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:41:20,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027834771] [2023-08-26 11:41:20,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:20,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:41:20,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:41:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:41:20,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:20,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:20,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:20,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:20,312 INFO L124 PetriNetUnfolderBase]: 64/107 cut-off events. [2023-08-26 11:41:20,312 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:20,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 107 events. 64/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 11 based on Foata normal form. 9/87 useless extension candidates. Maximal degree in co-relation 224. Up to 55 conditions per place. [2023-08-26 11:41:20,316 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 18 selfloop transitions, 4 changer transitions 2/24 dead transitions. [2023-08-26 11:41:20,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 103 flow [2023-08-26 11:41:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:41:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:41:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-08-26 11:41:20,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42197452229299365 [2023-08-26 11:41:20,321 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-08-26 11:41:20,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-08-26 11:41:20,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:20,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-08-26 11:41:20,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,326 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,326 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 31 flow. Second operand 4 states and 265 transitions. [2023-08-26 11:41:20,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 103 flow [2023-08-26 11:41:20,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:41:20,327 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 55 flow [2023-08-26 11:41:20,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-26 11:41:20,329 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-26 11:41:20,329 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 55 flow [2023-08-26 11:41:20,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:20,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:20,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:41:20,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:20,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:20,331 INFO L85 PathProgramCache]: Analyzing trace with hash 698883682, now seen corresponding path program 1 times [2023-08-26 11:41:20,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:20,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723517465] [2023-08-26 11:41:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:20,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:20,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:20,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723517465] [2023-08-26 11:41:20,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723517465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:20,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:20,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:41:20,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451484182] [2023-08-26 11:41:20,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:20,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:41:20,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:41:20,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:41:20,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:20,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:20,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:20,583 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-26 11:41:20,584 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 11:41:20,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 667 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 544. Up to 89 conditions per place. [2023-08-26 11:41:20,585 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-26 11:41:20,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 217 flow [2023-08-26 11:41:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:41:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:41:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 398 transitions. [2023-08-26 11:41:20,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42250530785562634 [2023-08-26 11:41:20,587 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 398 transitions. [2023-08-26 11:41:20,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 398 transitions. [2023-08-26 11:41:20,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:20,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 398 transitions. [2023-08-26 11:41:20,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,591 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,591 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 55 flow. Second operand 6 states and 398 transitions. [2023-08-26 11:41:20,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 217 flow [2023-08-26 11:41:20,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 217 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:20,593 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 136 flow [2023-08-26 11:41:20,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 11:41:20,593 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2023-08-26 11:41:20,594 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 136 flow [2023-08-26 11:41:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:41:20,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:20,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash 698901352, now seen corresponding path program 2 times [2023-08-26 11:41:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567426326] [2023-08-26 11:41:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:20,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:20,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:20,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567426326] [2023-08-26 11:41:20,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567426326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:20,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:20,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:41:20,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040161200] [2023-08-26 11:41:20,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:20,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:41:20,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:41:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:41:20,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:20,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:20,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:20,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:20,761 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-08-26 11:41:20,762 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-26 11:41:20,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 625 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 646. Up to 84 conditions per place. [2023-08-26 11:41:20,764 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-26 11:41:20,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 286 flow [2023-08-26 11:41:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:41:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:41:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2023-08-26 11:41:20,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42420382165605097 [2023-08-26 11:41:20,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 333 transitions. [2023-08-26 11:41:20,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 333 transitions. [2023-08-26 11:41:20,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:20,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 333 transitions. [2023-08-26 11:41:20,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,770 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,770 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 136 flow. Second operand 5 states and 333 transitions. [2023-08-26 11:41:20,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 286 flow [2023-08-26 11:41:20,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 284 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:20,775 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 184 flow [2023-08-26 11:41:20,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-26 11:41:20,777 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 16 predicate places. [2023-08-26 11:41:20,780 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 184 flow [2023-08-26 11:41:20,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:20,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:20,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:41:20,781 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:20,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1937873995, now seen corresponding path program 1 times [2023-08-26 11:41:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:20,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445195556] [2023-08-26 11:41:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:20,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:20,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:20,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445195556] [2023-08-26 11:41:20,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445195556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:20,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:20,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:20,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919730500] [2023-08-26 11:41:20,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:20,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:20,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:20,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:20,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:20,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:20,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:20,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:20,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:21,061 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-26 11:41:21,061 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2023-08-26 11:41:21,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 219 events. 126/219 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 705 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 783. Up to 86 conditions per place. [2023-08-26 11:41:21,063 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-08-26 11:41:21,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 427 flow [2023-08-26 11:41:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:41:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:41:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 592 transitions. [2023-08-26 11:41:21,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418966737438075 [2023-08-26 11:41:21,065 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 592 transitions. [2023-08-26 11:41:21,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 592 transitions. [2023-08-26 11:41:21,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:21,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 592 transitions. [2023-08-26 11:41:21,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.77777777777777) internal successors, (592), 9 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,070 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,070 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 184 flow. Second operand 9 states and 592 transitions. [2023-08-26 11:41:21,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 427 flow [2023-08-26 11:41:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 390 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 11:41:21,074 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 253 flow [2023-08-26 11:41:21,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-26 11:41:21,075 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-08-26 11:41:21,075 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 253 flow [2023-08-26 11:41:21,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:21,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:21,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:41:21,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:21,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:21,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1938173455, now seen corresponding path program 2 times [2023-08-26 11:41:21,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:21,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367429230] [2023-08-26 11:41:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:21,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:21,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:21,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367429230] [2023-08-26 11:41:21,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367429230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:21,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:21,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711977728] [2023-08-26 11:41:21,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:21,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:21,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:21,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:21,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:21,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:21,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:21,275 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-26 11:41:21,276 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-08-26 11:41:21,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 283 events. 162/283 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 948 event pairs, 22 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1077. Up to 77 conditions per place. [2023-08-26 11:41:21,278 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-08-26 11:41:21,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 499 flow [2023-08-26 11:41:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:41:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:41:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 526 transitions. [2023-08-26 11:41:21,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41878980891719747 [2023-08-26 11:41:21,280 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 526 transitions. [2023-08-26 11:41:21,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 526 transitions. [2023-08-26 11:41:21,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:21,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 526 transitions. [2023-08-26 11:41:21,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.75) internal successors, (526), 8 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) [2023-08-26 11:41:21,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,284 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,284 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 253 flow. Second operand 8 states and 526 transitions. [2023-08-26 11:41:21,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 499 flow [2023-08-26 11:41:21,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 469 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-26 11:41:21,289 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 346 flow [2023-08-26 11:41:21,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-26 11:41:21,290 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2023-08-26 11:41:21,290 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 346 flow [2023-08-26 11:41:21,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:21,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:21,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:41:21,290 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:21,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1978408975, now seen corresponding path program 3 times [2023-08-26 11:41:21,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:21,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421761406] [2023-08-26 11:41:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:21,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:21,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:21,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421761406] [2023-08-26 11:41:21,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421761406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:21,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:21,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:21,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110807604] [2023-08-26 11:41:21,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:21,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:21,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:21,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:21,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:21,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:21,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:21,510 INFO L124 PetriNetUnfolderBase]: 158/275 cut-off events. [2023-08-26 11:41:21,511 INFO L125 PetriNetUnfolderBase]: For 1250/1250 co-relation queries the response was YES. [2023-08-26 11:41:21,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 275 events. 158/275 cut-off events. For 1250/1250 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 938 event pairs, 18 based on Foata normal form. 8/283 useless extension candidates. Maximal degree in co-relation 1236. Up to 65 conditions per place. [2023-08-26 11:41:21,513 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 28 selfloop transitions, 25 changer transitions 10/63 dead transitions. [2023-08-26 11:41:21,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 618 flow [2023-08-26 11:41:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:41:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:41:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 525 transitions. [2023-08-26 11:41:21,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179936305732484 [2023-08-26 11:41:21,515 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 525 transitions. [2023-08-26 11:41:21,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 525 transitions. [2023-08-26 11:41:21,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:21,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 525 transitions. [2023-08-26 11:41:21,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.625) internal successors, (525), 8 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,519 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,519 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 346 flow. Second operand 8 states and 525 transitions. [2023-08-26 11:41:21,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 618 flow [2023-08-26 11:41:21,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 583 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 11:41:21,526 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 439 flow [2023-08-26 11:41:21,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2023-08-26 11:41:21,527 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 39 predicate places. [2023-08-26 11:41:21,527 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 439 flow [2023-08-26 11:41:21,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:21,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:21,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:41:21,528 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:21,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash -73293778, now seen corresponding path program 4 times [2023-08-26 11:41:21,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:21,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288964994] [2023-08-26 11:41:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:21,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:21,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288964994] [2023-08-26 11:41:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288964994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785926046] [2023-08-26 11:41:21,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 11:41:21,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:21,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:21,655 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) [2023-08-26 11:41:21,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 11:41:21,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 11:41:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:21,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 11:41:21,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:21,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:21,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785926046] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:21,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:21,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 11:41:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183961567] [2023-08-26 11:41:21,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:21,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 11:41:21,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 11:41:21,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-26 11:41:21,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:21,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:21,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:21,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:21,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:22,122 INFO L124 PetriNetUnfolderBase]: 182/323 cut-off events. [2023-08-26 11:41:22,122 INFO L125 PetriNetUnfolderBase]: For 2479/2479 co-relation queries the response was YES. [2023-08-26 11:41:22,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 323 events. 182/323 cut-off events. For 2479/2479 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1098 event pairs, 39 based on Foata normal form. 24/347 useless extension candidates. Maximal degree in co-relation 1585. Up to 181 conditions per place. [2023-08-26 11:41:22,125 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 45 selfloop transitions, 17 changer transitions 19/81 dead transitions. [2023-08-26 11:41:22,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 875 flow [2023-08-26 11:41:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 11:41:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 11:41:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 785 transitions. [2023-08-26 11:41:22,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 11:41:22,128 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 785 transitions. [2023-08-26 11:41:22,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 785 transitions. [2023-08-26 11:41:22,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:22,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 785 transitions. [2023-08-26 11:41:22,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 65.41666666666667) internal successors, (785), 12 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:22,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 157.0) internal successors, (2041), 13 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:22,133 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 157.0) internal successors, (2041), 13 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:22,133 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 439 flow. Second operand 12 states and 785 transitions. [2023-08-26 11:41:22,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 875 flow [2023-08-26 11:41:22,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 822 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-26 11:41:22,142 INFO L231 Difference]: Finished difference. Result has 73 places, 47 transitions, 546 flow [2023-08-26 11:41:22,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=546, PETRI_PLACES=73, PETRI_TRANSITIONS=47} [2023-08-26 11:41:22,143 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 51 predicate places. [2023-08-26 11:41:22,143 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 47 transitions, 546 flow [2023-08-26 11:41:22,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:22,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:22,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:22,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 11:41:22,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 11:41:22,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:22,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash -56312908, now seen corresponding path program 5 times [2023-08-26 11:41:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:22,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290456337] [2023-08-26 11:41:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:22,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:22,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:22,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290456337] [2023-08-26 11:41:22,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290456337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:22,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929788446] [2023-08-26 11:41:22,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 11:41:22,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:22,471 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) [2023-08-26 11:41:22,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 11:41:22,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:41:22,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:22,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 11:41:22,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:22,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:22,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929788446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:22,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:22,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-26 11:41:22,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673667323] [2023-08-26 11:41:22,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:22,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:41:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:41:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:41:22,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:22,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 47 transitions, 546 flow. Second operand has 13 states, 13 states have (on average 61.92307692307692) internal successors, (805), 13 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:22,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:22,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:22,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:23,046 INFO L124 PetriNetUnfolderBase]: 244/439 cut-off events. [2023-08-26 11:41:23,047 INFO L125 PetriNetUnfolderBase]: For 6692/6692 co-relation queries the response was YES. [2023-08-26 11:41:23,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 439 events. 244/439 cut-off events. For 6692/6692 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1693 event pairs, 30 based on Foata normal form. 28/467 useless extension candidates. Maximal degree in co-relation 2487. Up to 128 conditions per place. [2023-08-26 11:41:23,051 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 46 selfloop transitions, 42 changer transitions 29/117 dead transitions. [2023-08-26 11:41:23,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 1407 flow [2023-08-26 11:41:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 11:41:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 11:41:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1177 transitions. [2023-08-26 11:41:23,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164897381457891 [2023-08-26 11:41:23,055 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1177 transitions. [2023-08-26 11:41:23,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1177 transitions. [2023-08-26 11:41:23,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:23,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1177 transitions. [2023-08-26 11:41:23,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,063 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,063 INFO L175 Difference]: Start difference. First operand has 73 places, 47 transitions, 546 flow. Second operand 18 states and 1177 transitions. [2023-08-26 11:41:23,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 1407 flow [2023-08-26 11:41:23,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 1267 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-26 11:41:23,084 INFO L231 Difference]: Finished difference. Result has 95 places, 64 transitions, 900 flow [2023-08-26 11:41:23,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=900, PETRI_PLACES=95, PETRI_TRANSITIONS=64} [2023-08-26 11:41:23,084 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 73 predicate places. [2023-08-26 11:41:23,084 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 64 transitions, 900 flow [2023-08-26 11:41:23,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 61.92307692307692) internal successors, (805), 13 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:23,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:23,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:23,290 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,SelfDestructingSolverStorable10 [2023-08-26 11:41:23,291 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:23,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1431096326, now seen corresponding path program 6 times [2023-08-26 11:41:23,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:23,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728468284] [2023-08-26 11:41:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:23,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:23,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728468284] [2023-08-26 11:41:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728468284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054983698] [2023-08-26 11:41:23,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 11:41:23,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:23,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:23,406 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) [2023-08-26 11:41:23,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 11:41:23,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 11:41:23,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:23,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 11:41:23,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:23,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:23,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054983698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:23,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:23,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 11:41:23,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320160182] [2023-08-26 11:41:23,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:23,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 11:41:23,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 11:41:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-26 11:41:23,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:23,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 64 transitions, 900 flow. Second operand has 14 states, 14 states have (on average 61.785714285714285) internal successors, (865), 14 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:23,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:23,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:23,911 INFO L124 PetriNetUnfolderBase]: 328/599 cut-off events. [2023-08-26 11:41:23,911 INFO L125 PetriNetUnfolderBase]: For 14932/14932 co-relation queries the response was YES. [2023-08-26 11:41:23,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4416 conditions, 599 events. 328/599 cut-off events. For 14932/14932 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2521 event pairs, 23 based on Foata normal form. 24/623 useless extension candidates. Maximal degree in co-relation 4377. Up to 204 conditions per place. [2023-08-26 11:41:23,917 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 56 selfloop transitions, 58 changer transitions 19/133 dead transitions. [2023-08-26 11:41:23,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 133 transitions, 2135 flow [2023-08-26 11:41:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 11:41:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 11:41:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1172 transitions. [2023-08-26 11:41:23,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472045293701343 [2023-08-26 11:41:23,921 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1172 transitions. [2023-08-26 11:41:23,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1172 transitions. [2023-08-26 11:41:23,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:23,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1172 transitions. [2023-08-26 11:41:23,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.11111111111111) internal successors, (1172), 18 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,929 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,929 INFO L175 Difference]: Start difference. First operand has 95 places, 64 transitions, 900 flow. Second operand 18 states and 1172 transitions. [2023-08-26 11:41:23,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 133 transitions, 2135 flow [2023-08-26 11:41:23,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1849 flow, removed 129 selfloop flow, removed 7 redundant places. [2023-08-26 11:41:23,988 INFO L231 Difference]: Finished difference. Result has 113 places, 80 transitions, 1256 flow [2023-08-26 11:41:23,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1256, PETRI_PLACES=113, PETRI_TRANSITIONS=80} [2023-08-26 11:41:23,989 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 91 predicate places. [2023-08-26 11:41:23,989 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 80 transitions, 1256 flow [2023-08-26 11:41:23,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.785714285714285) internal successors, (865), 14 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:23,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:23,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:23,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:24,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:24,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:24,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1418584700, now seen corresponding path program 7 times [2023-08-26 11:41:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:24,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013475297] [2023-08-26 11:41:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:24,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:24,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:24,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013475297] [2023-08-26 11:41:24,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013475297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:24,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803150508] [2023-08-26 11:41:24,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 11:41:24,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:24,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:24,284 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) [2023-08-26 11:41:24,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 11:41:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:24,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 11:41:24,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:24,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:24,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803150508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:24,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:24,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 11:41:24,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680874832] [2023-08-26 11:41:24,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:24,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 11:41:24,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 11:41:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-26 11:41:24,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:24,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 80 transitions, 1256 flow. Second operand has 14 states, 14 states have (on average 61.785714285714285) internal successors, (865), 14 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:24,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:24,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:24,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:24,970 INFO L124 PetriNetUnfolderBase]: 388/707 cut-off events. [2023-08-26 11:41:24,970 INFO L125 PetriNetUnfolderBase]: For 28828/28828 co-relation queries the response was YES. [2023-08-26 11:41:24,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5910 conditions, 707 events. 388/707 cut-off events. For 28828/28828 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3087 event pairs, 12 based on Foata normal form. 28/735 useless extension candidates. Maximal degree in co-relation 5863. Up to 243 conditions per place. [2023-08-26 11:41:24,978 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 46 selfloop transitions, 84 changer transitions 38/168 dead transitions. [2023-08-26 11:41:24,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 168 transitions, 3022 flow [2023-08-26 11:41:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 11:41:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 11:41:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1436 transitions. [2023-08-26 11:41:24,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157498552403011 [2023-08-26 11:41:24,984 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1436 transitions. [2023-08-26 11:41:24,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1436 transitions. [2023-08-26 11:41:24,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:24,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1436 transitions. [2023-08-26 11:41:24,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.27272727272727) internal successors, (1436), 22 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:24,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:24,996 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:24,996 INFO L175 Difference]: Start difference. First operand has 113 places, 80 transitions, 1256 flow. Second operand 22 states and 1436 transitions. [2023-08-26 11:41:24,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 168 transitions, 3022 flow [2023-08-26 11:41:25,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 168 transitions, 2450 flow, removed 251 selfloop flow, removed 12 redundant places. [2023-08-26 11:41:25,053 INFO L231 Difference]: Finished difference. Result has 133 places, 101 transitions, 1726 flow [2023-08-26 11:41:25,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1726, PETRI_PLACES=133, PETRI_TRANSITIONS=101} [2023-08-26 11:41:25,054 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 111 predicate places. [2023-08-26 11:41:25,055 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 101 transitions, 1726 flow [2023-08-26 11:41:25,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.785714285714285) internal successors, (865), 14 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:25,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:25,055 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:25,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:25,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:25,261 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:25,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash -677009652, now seen corresponding path program 8 times [2023-08-26 11:41:25,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:25,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578346792] [2023-08-26 11:41:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:25,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:25,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578346792] [2023-08-26 11:41:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578346792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942936668] [2023-08-26 11:41:25,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 11:41:25,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:25,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:25,417 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) [2023-08-26 11:41:25,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 11:41:25,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:41:25,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:25,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 11:41:25,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:25,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:25,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942936668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:25,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:25,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-26 11:41:25,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690804577] [2023-08-26 11:41:25,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:25,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 11:41:25,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 11:41:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-26 11:41:25,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:25,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 101 transitions, 1726 flow. Second operand has 22 states, 22 states have (on average 61.5) internal successors, (1353), 22 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:25,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:25,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:26,523 INFO L124 PetriNetUnfolderBase]: 536/955 cut-off events. [2023-08-26 11:41:26,523 INFO L125 PetriNetUnfolderBase]: For 45473/45473 co-relation queries the response was YES. [2023-08-26 11:41:26,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8858 conditions, 955 events. 536/955 cut-off events. For 45473/45473 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4119 event pairs, 15 based on Foata normal form. 36/991 useless extension candidates. Maximal degree in co-relation 8803. Up to 335 conditions per place. [2023-08-26 11:41:26,534 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 60 selfloop transitions, 121 changer transitions 66/247 dead transitions. [2023-08-26 11:41:26,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 247 transitions, 4990 flow [2023-08-26 11:41:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 11:41:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 11:41:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2342 transitions. [2023-08-26 11:41:26,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143665958952583 [2023-08-26 11:41:26,539 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2342 transitions. [2023-08-26 11:41:26,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2342 transitions. [2023-08-26 11:41:26,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:26,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2342 transitions. [2023-08-26 11:41:26,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.05555555555556) internal successors, (2342), 36 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:26,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:26,557 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:26,557 INFO L175 Difference]: Start difference. First operand has 133 places, 101 transitions, 1726 flow. Second operand 36 states and 2342 transitions. [2023-08-26 11:41:26,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 247 transitions, 4990 flow [2023-08-26 11:41:26,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 247 transitions, 4354 flow, removed 281 selfloop flow, removed 14 redundant places. [2023-08-26 11:41:26,639 INFO L231 Difference]: Finished difference. Result has 172 places, 138 transitions, 2764 flow [2023-08-26 11:41:26,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2764, PETRI_PLACES=172, PETRI_TRANSITIONS=138} [2023-08-26 11:41:26,640 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 150 predicate places. [2023-08-26 11:41:26,640 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 138 transitions, 2764 flow [2023-08-26 11:41:26,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.5) internal successors, (1353), 22 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:26,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:26,641 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:26,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:26,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 11:41:26,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:26,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:26,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1707412399, now seen corresponding path program 9 times [2023-08-26 11:41:26,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:26,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151447734] [2023-08-26 11:41:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:26,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:27,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:27,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151447734] [2023-08-26 11:41:27,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151447734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:27,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739877904] [2023-08-26 11:41:27,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 11:41:27,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:27,116 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) [2023-08-26 11:41:27,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 11:41:27,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-26 11:41:27,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:27,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 11:41:27,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:27,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:27,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739877904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:27,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:27,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 24 [2023-08-26 11:41:27,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667578135] [2023-08-26 11:41:27,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:27,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 11:41:27,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:27,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 11:41:27,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-08-26 11:41:27,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:27,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 138 transitions, 2764 flow. Second operand has 26 states, 26 states have (on average 61.46153846153846) internal successors, (1598), 26 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:27,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:27,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:27,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:28,249 INFO L124 PetriNetUnfolderBase]: 664/1211 cut-off events. [2023-08-26 11:41:28,249 INFO L125 PetriNetUnfolderBase]: For 97076/97076 co-relation queries the response was YES. [2023-08-26 11:41:28,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13943 conditions, 1211 events. 664/1211 cut-off events. For 97076/97076 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5496 event pairs, 102 based on Foata normal form. 32/1243 useless extension candidates. Maximal degree in co-relation 13874. Up to 463 conditions per place. [2023-08-26 11:41:28,266 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 106 selfloop transitions, 96 changer transitions 53/255 dead transitions. [2023-08-26 11:41:28,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 6366 flow [2023-08-26 11:41:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 11:41:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 11:41:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1877 transitions. [2023-08-26 11:41:28,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122556556116846 [2023-08-26 11:41:28,269 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1877 transitions. [2023-08-26 11:41:28,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1877 transitions. [2023-08-26 11:41:28,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:28,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1877 transitions. [2023-08-26 11:41:28,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 64.72413793103448) internal successors, (1877), 29 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:28,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:28,279 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:28,279 INFO L175 Difference]: Start difference. First operand has 172 places, 138 transitions, 2764 flow. Second operand 29 states and 1877 transitions. [2023-08-26 11:41:28,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 6366 flow [2023-08-26 11:41:28,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 255 transitions, 4884 flow, removed 710 selfloop flow, removed 13 redundant places. [2023-08-26 11:41:28,543 INFO L231 Difference]: Finished difference. Result has 197 places, 170 transitions, 3115 flow [2023-08-26 11:41:28,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3115, PETRI_PLACES=197, PETRI_TRANSITIONS=170} [2023-08-26 11:41:28,544 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 175 predicate places. [2023-08-26 11:41:28,544 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 170 transitions, 3115 flow [2023-08-26 11:41:28,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.46153846153846) internal successors, (1598), 26 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:28,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:28,545 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:28,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:28,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 11:41:28,750 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:28,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash 595027935, now seen corresponding path program 10 times [2023-08-26 11:41:28,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:28,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222411253] [2023-08-26 11:41:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:28,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:29,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222411253] [2023-08-26 11:41:29,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222411253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922728969] [2023-08-26 11:41:29,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 11:41:29,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:29,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:29,028 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) [2023-08-26 11:41:29,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 11:41:29,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 11:41:29,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:29,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 11:41:29,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:29,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922728969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:29,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:29,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2023-08-26 11:41:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142119236] [2023-08-26 11:41:29,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:29,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-26 11:41:29,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-26 11:41:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2023-08-26 11:41:29,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:29,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 170 transitions, 3115 flow. Second operand has 30 states, 30 states have (on average 61.4) internal successors, (1842), 30 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:29,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:29,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:29,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:30,365 INFO L124 PetriNetUnfolderBase]: 808/1483 cut-off events. [2023-08-26 11:41:30,365 INFO L125 PetriNetUnfolderBase]: For 154855/154855 co-relation queries the response was YES. [2023-08-26 11:41:30,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17187 conditions, 1483 events. 808/1483 cut-off events. For 154855/154855 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6861 event pairs, 38 based on Foata normal form. 32/1515 useless extension candidates. Maximal degree in co-relation 17112. Up to 591 conditions per place. [2023-08-26 11:41:30,394 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 73 selfloop transitions, 173 changer transitions 67/313 dead transitions. [2023-08-26 11:41:30,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 313 transitions, 7239 flow [2023-08-26 11:41:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 11:41:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 11:41:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2332 transitions. [2023-08-26 11:41:30,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41259731068648264 [2023-08-26 11:41:30,399 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2332 transitions. [2023-08-26 11:41:30,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2332 transitions. [2023-08-26 11:41:30,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:30,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2332 transitions. [2023-08-26 11:41:30,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 64.77777777777777) internal successors, (2332), 36 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:30,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:30,422 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:30,422 INFO L175 Difference]: Start difference. First operand has 197 places, 170 transitions, 3115 flow. Second operand 36 states and 2332 transitions. [2023-08-26 11:41:30,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 313 transitions, 7239 flow [2023-08-26 11:41:30,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 313 transitions, 6567 flow, removed 304 selfloop flow, removed 11 redundant places. [2023-08-26 11:41:30,809 INFO L231 Difference]: Finished difference. Result has 234 places, 207 transitions, 4120 flow [2023-08-26 11:41:30,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4120, PETRI_PLACES=234, PETRI_TRANSITIONS=207} [2023-08-26 11:41:30,810 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 212 predicate places. [2023-08-26 11:41:30,810 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 207 transitions, 4120 flow [2023-08-26 11:41:30,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 61.4) internal successors, (1842), 30 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:30,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:30,811 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:30,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:31,017 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:31,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1818296057, now seen corresponding path program 11 times [2023-08-26 11:41:31,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:31,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543305612] [2023-08-26 11:41:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:31,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:31,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543305612] [2023-08-26 11:41:31,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543305612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:31,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73132213] [2023-08-26 11:41:31,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 11:41:31,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:31,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:31,229 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) [2023-08-26 11:41:31,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 11:41:31,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-26 11:41:31,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:31,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 11:41:31,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:31,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:31,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73132213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:31,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:31,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 24 [2023-08-26 11:41:31,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16361482] [2023-08-26 11:41:31,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:31,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 11:41:31,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 11:41:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-08-26 11:41:31,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:31,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 207 transitions, 4120 flow. Second operand has 26 states, 26 states have (on average 61.42307692307692) internal successors, (1597), 26 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:31,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:31,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:31,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:32,669 INFO L124 PetriNetUnfolderBase]: 928/1687 cut-off events. [2023-08-26 11:41:32,669 INFO L125 PetriNetUnfolderBase]: For 236172/236172 co-relation queries the response was YES. [2023-08-26 11:41:32,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22180 conditions, 1687 events. 928/1687 cut-off events. For 236172/236172 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7776 event pairs, 16 based on Foata normal form. 32/1719 useless extension candidates. Maximal degree in co-relation 22091. Up to 675 conditions per place. [2023-08-26 11:41:32,697 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 76 selfloop transitions, 214 changer transitions 75/365 dead transitions. [2023-08-26 11:41:32,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 365 transitions, 9592 flow [2023-08-26 11:41:32,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-26 11:41:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-26 11:41:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2853 transitions. [2023-08-26 11:41:32,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129994209612044 [2023-08-26 11:41:32,702 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2853 transitions. [2023-08-26 11:41:32,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2853 transitions. [2023-08-26 11:41:32,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:32,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2853 transitions. [2023-08-26 11:41:32,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 64.8409090909091) internal successors, (2853), 44 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:32,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 157.0) internal successors, (7065), 45 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:32,714 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 157.0) internal successors, (7065), 45 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:32,714 INFO L175 Difference]: Start difference. First operand has 234 places, 207 transitions, 4120 flow. Second operand 44 states and 2853 transitions. [2023-08-26 11:41:32,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 365 transitions, 9592 flow [2023-08-26 11:41:33,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 365 transitions, 8812 flow, removed 301 selfloop flow, removed 17 redundant places. [2023-08-26 11:41:33,121 INFO L231 Difference]: Finished difference. Result has 276 places, 234 transitions, 5351 flow [2023-08-26 11:41:33,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5351, PETRI_PLACES=276, PETRI_TRANSITIONS=234} [2023-08-26 11:41:33,121 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 254 predicate places. [2023-08-26 11:41:33,122 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 234 transitions, 5351 flow [2023-08-26 11:41:33,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.42307692307692) internal successors, (1597), 26 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:33,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:33,122 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:33,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:33,322 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,SelfDestructingSolverStorable16 [2023-08-26 11:41:33,323 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:33,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1618107878, now seen corresponding path program 12 times [2023-08-26 11:41:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:33,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812696312] [2023-08-26 11:41:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:33,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:33,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:33,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812696312] [2023-08-26 11:41:33,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812696312] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:33,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043608128] [2023-08-26 11:41:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 11:41:33,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:33,643 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) [2023-08-26 11:41:33,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 11:41:33,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-26 11:41:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:33,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-26 11:41:33,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:33,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:34,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043608128] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:34,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 27 [2023-08-26 11:41:34,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103811329] [2023-08-26 11:41:34,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:34,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 11:41:34,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 11:41:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-08-26 11:41:34,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:34,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 234 transitions, 5351 flow. Second operand has 29 states, 29 states have (on average 61.41379310344828) internal successors, (1781), 29 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:34,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:34,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:34,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:35,547 INFO L124 PetriNetUnfolderBase]: 1040/1887 cut-off events. [2023-08-26 11:41:35,547 INFO L125 PetriNetUnfolderBase]: For 382747/382747 co-relation queries the response was YES. [2023-08-26 11:41:35,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28677 conditions, 1887 events. 1040/1887 cut-off events. For 382747/382747 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 8836 event pairs, 17 based on Foata normal form. 28/1915 useless extension candidates. Maximal degree in co-relation 28572. Up to 755 conditions per place. [2023-08-26 11:41:35,577 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 79 selfloop transitions, 247 changer transitions 96/422 dead transitions. [2023-08-26 11:41:35,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 422 transitions, 12535 flow [2023-08-26 11:41:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-26 11:41:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-26 11:41:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3306 transitions. [2023-08-26 11:41:35,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41288872236792806 [2023-08-26 11:41:35,583 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3306 transitions. [2023-08-26 11:41:35,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3306 transitions. [2023-08-26 11:41:35,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:35,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3306 transitions. [2023-08-26 11:41:35,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 64.82352941176471) internal successors, (3306), 51 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:35,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 157.0) internal successors, (8164), 52 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:35,597 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 157.0) internal successors, (8164), 52 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:35,597 INFO L175 Difference]: Start difference. First operand has 276 places, 234 transitions, 5351 flow. Second operand 51 states and 3306 transitions. [2023-08-26 11:41:35,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 422 transitions, 12535 flow [2023-08-26 11:41:36,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 422 transitions, 10488 flow, removed 883 selfloop flow, removed 28 redundant places. [2023-08-26 11:41:36,426 INFO L231 Difference]: Finished difference. Result has 308 places, 266 transitions, 5713 flow [2023-08-26 11:41:36,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5713, PETRI_PLACES=308, PETRI_TRANSITIONS=266} [2023-08-26 11:41:36,426 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 286 predicate places. [2023-08-26 11:41:36,426 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 266 transitions, 5713 flow [2023-08-26 11:41:36,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 61.41379310344828) internal successors, (1781), 29 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:36,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:36,427 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:36,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:36,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 11:41:36,628 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:36,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1275120642, now seen corresponding path program 13 times [2023-08-26 11:41:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:36,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129728468] [2023-08-26 11:41:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:36,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:36,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129728468] [2023-08-26 11:41:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129728468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479666772] [2023-08-26 11:41:36,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 11:41:36,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:36,785 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) [2023-08-26 11:41:36,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 11:41:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:36,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 11:41:36,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:36,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 11:41:36,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479666772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:36,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 11:41:36,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2023-08-26 11:41:36,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439133782] [2023-08-26 11:41:36,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:36,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:41:36,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:36,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:41:36,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-08-26 11:41:36,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 157 [2023-08-26 11:41:36,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 266 transitions, 5713 flow. Second operand has 13 states, 13 states have (on average 65.23076923076923) internal successors, (848), 13 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:36,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:36,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 157 [2023-08-26 11:41:36,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:38,911 INFO L124 PetriNetUnfolderBase]: 4503/7073 cut-off events. [2023-08-26 11:41:38,911 INFO L125 PetriNetUnfolderBase]: For 1535018/1535018 co-relation queries the response was YES. [2023-08-26 11:41:38,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100158 conditions, 7073 events. 4503/7073 cut-off events. For 1535018/1535018 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 38582 event pairs, 86 based on Foata normal form. 380/7453 useless extension candidates. Maximal degree in co-relation 100046. Up to 2663 conditions per place. [2023-08-26 11:41:38,984 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 0 selfloop transitions, 0 changer transitions 1468/1468 dead transitions. [2023-08-26 11:41:38,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1468 transitions, 30221 flow [2023-08-26 11:41:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 11:41:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 11:41:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 916 transitions. [2023-08-26 11:41:38,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4487996080352768 [2023-08-26 11:41:38,986 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 916 transitions. [2023-08-26 11:41:38,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 916 transitions. [2023-08-26 11:41:38,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:38,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 916 transitions. [2023-08-26 11:41:38,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 70.46153846153847) internal successors, (916), 13 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:38,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:38,990 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:38,991 INFO L175 Difference]: Start difference. First operand has 308 places, 266 transitions, 5713 flow. Second operand 13 states and 916 transitions. [2023-08-26 11:41:38,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1468 transitions, 30221 flow [2023-08-26 11:41:41,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1468 transitions, 26756 flow, removed 425 selfloop flow, removed 44 redundant places. [2023-08-26 11:41:41,702 INFO L231 Difference]: Finished difference. Result has 274 places, 0 transitions, 0 flow [2023-08-26 11:41:41,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=274, PETRI_TRANSITIONS=0} [2023-08-26 11:41:41,703 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 252 predicate places. [2023-08-26 11:41:41,703 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 0 transitions, 0 flow [2023-08-26 11:41:41,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 65.23076923076923) internal successors, (848), 13 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:41,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-26 11:41:41,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 11:41:41,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 11:41:41,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 11:41:41,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 11:41:41,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-26 11:41:41,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2023-08-26 11:41:41,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:41,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:41,915 INFO L445 BasicCegarLoop]: Path program histogram: [13, 2, 1, 1, 1, 1] [2023-08-26 11:41:41,918 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 11:41:41,918 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 11:41:41,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 11:41:41 BasicIcfg [2023-08-26 11:41:41,920 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 11:41:41,920 INFO L158 Benchmark]: Toolchain (without parser) took 25768.43ms. Allocated memory was 333.4MB in the beginning and 828.4MB in the end (delta: 494.9MB). Free memory was 308.7MB in the beginning and 617.9MB in the end (delta: -309.3MB). Peak memory consumption was 579.7MB. Max. memory is 16.0GB. [2023-08-26 11:41:41,920 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 333.4MB. Free memory is still 310.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:41:41,920 INFO L158 Benchmark]: CACSL2BoogieTranslator took 466.65ms. Allocated memory is still 333.4MB. Free memory was 308.4MB in the beginning and 288.9MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 11:41:41,921 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.91ms. Allocated memory is still 333.4MB. Free memory was 288.9MB in the beginning and 286.9MB in the end (delta: 1.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 11:41:41,921 INFO L158 Benchmark]: Boogie Preprocessor took 21.02ms. Allocated memory is still 333.4MB. Free memory was 286.9MB in the beginning and 285.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:41:41,921 INFO L158 Benchmark]: RCFGBuilder took 382.77ms. Allocated memory is still 333.4MB. Free memory was 285.4MB in the beginning and 272.3MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 11:41:41,921 INFO L158 Benchmark]: TraceAbstraction took 24852.28ms. Allocated memory was 333.4MB in the beginning and 828.4MB in the end (delta: 494.9MB). Free memory was 271.2MB in the beginning and 617.9MB in the end (delta: -346.7MB). Peak memory consumption was 541.9MB. Max. memory is 16.0GB. [2023-08-26 11:41:41,922 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 333.4MB. Free memory is still 310.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 466.65ms. Allocated memory is still 333.4MB. Free memory was 308.4MB in the beginning and 288.9MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.91ms. Allocated memory is still 333.4MB. Free memory was 288.9MB in the beginning and 286.9MB in the end (delta: 1.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.02ms. Allocated memory is still 333.4MB. Free memory was 286.9MB in the beginning and 285.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 382.77ms. Allocated memory is still 333.4MB. Free memory was 285.4MB in the beginning and 272.3MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 24852.28ms. Allocated memory was 333.4MB in the beginning and 828.4MB in the end (delta: 494.9MB). Free memory was 271.2MB in the beginning and 617.9MB in the end (delta: -346.7MB). Peak memory consumption was 541.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 75 PlacesBefore, 22 PlacesAfterwards, 74 TransitionsBefore, 18 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 81 TotalNumberOfCompositions, 1354 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1185, independent: 1156, independent conditional: 0, independent unconditional: 1156, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 799, independent: 787, independent conditional: 0, independent unconditional: 787, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1185, independent: 369, independent conditional: 0, independent unconditional: 369, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 799, unknown conditional: 0, unknown unconditional: 799] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 693]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 24.7s, OverallIterations: 19, TraceHistogramMax: 11, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 14.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2866 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2866 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 251 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2856 IncrementalHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 251 mSolverCounterUnsat, 0 mSDtfsCounter, 2856 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 699 GetRequests, 219 SyntacticMatches, 35 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6032 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5713occurred in iteration=18, InterpolantAutomatonStates: 327, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 427 NumberOfCodeBlocks, 427 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 544 ConstructedInterpolants, 0 QuantifiedInterpolants, 2224 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1660 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 38 InterpolantComputations, 10 PerfectInterpolantSequences, 190/875 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 11:41:41,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...