/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/stack_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:40:07,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:40:07,644 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 11:40:07,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:40:07,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:40:07,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:40:07,683 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:40:07,688 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:40:07,688 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:40:07,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:40:07,692 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:40:07,692 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:40:07,693 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:40:07,694 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:40:07,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:40:07,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:40:07,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:40:07,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:40:07,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:40:07,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:40:07,696 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:40:07,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:40:07,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:40:07,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:40:07,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:40:07,697 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:40:07,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:40:07,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:40:07,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:40:07,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:40:07,699 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:40:07,699 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:40:07,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:40:07,700 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:40:07,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:40:07,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:40:07,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:40:08,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:40:08,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:40:08,010 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:40:08,010 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:40:08,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2023-08-26 11:40:09,131 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:40:09,423 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:40:09,424 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2023-08-26 11:40:09,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91624ae2/595901067bb34ae3b45b513dbec97913/FLAGf283f3aac [2023-08-26 11:40:09,452 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91624ae2/595901067bb34ae3b45b513dbec97913 [2023-08-26 11:40:09,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:40:09,455 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:40:09,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:40:09,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:40:09,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:40:09,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:40:09" (1/1) ... [2023-08-26 11:40:09,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3276382c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:09, skipping insertion in model container [2023-08-26 11:40:09,459 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:40:09" (1/1) ... [2023-08-26 11:40:09,514 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:40:09,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:40:09,974 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:40:10,002 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 11:40:10,004 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 11:40:10,010 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-26 11:40:10,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:40:10,115 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:40:10,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10 WrapperNode [2023-08-26 11:40:10,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:40:10,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:40:10,116 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:40:10,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:40:10,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,184 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 155 [2023-08-26 11:40:10,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:40:10,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:40:10,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:40:10,186 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:40:10,193 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,211 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,212 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,217 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:40:10,240 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:40:10,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:40:10,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:40:10,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (1/1) ... [2023-08-26 11:40:10,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:40:10,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:10,274 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 11:40:10,298 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 11:40:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 11:40:10,314 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 11:40:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 11:40:10,314 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 11:40:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:40:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:40:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:40:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:40:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 11:40:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:40:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:40:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:40:10,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:40:10,317 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 11:40:10,486 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:40:10,488 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:40:10,756 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:40:10,763 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:40:10,763 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:40:10,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:40:10 BoogieIcfgContainer [2023-08-26 11:40:10,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:40:10,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:40:10,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:40:10,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:40:10,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:40:09" (1/3) ... [2023-08-26 11:40:10,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e17dd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:40:10, skipping insertion in model container [2023-08-26 11:40:10,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:40:10" (2/3) ... [2023-08-26 11:40:10,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e17dd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:40:10, skipping insertion in model container [2023-08-26 11:40:10,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:40:10" (3/3) ... [2023-08-26 11:40:10,772 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2023-08-26 11:40:10,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:40:10,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 11:40:10,787 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:40:10,898 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 11:40:10,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 171 transitions, 358 flow [2023-08-26 11:40:11,014 INFO L124 PetriNetUnfolderBase]: 12/169 cut-off events. [2023-08-26 11:40:11,015 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:40:11,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 12/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 448 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 127. Up to 3 conditions per place. [2023-08-26 11:40:11,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 171 transitions, 358 flow [2023-08-26 11:40:11,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 160 transitions, 329 flow [2023-08-26 11:40:11,034 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:40:11,050 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 160 transitions, 329 flow [2023-08-26 11:40:11,054 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 160 transitions, 329 flow [2023-08-26 11:40:11,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 160 transitions, 329 flow [2023-08-26 11:40:11,109 INFO L124 PetriNetUnfolderBase]: 12/160 cut-off events. [2023-08-26 11:40:11,109 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:40:11,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 160 events. 12/160 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 403 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 127. Up to 3 conditions per place. [2023-08-26 11:40:11,115 INFO L119 LiptonReduction]: Number of co-enabled transitions 8840 [2023-08-26 11:40:15,382 INFO L134 LiptonReduction]: Checked pairs total: 13733 [2023-08-26 11:40:15,382 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-26 11:40:15,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:40:15,399 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;@705345fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:40:15,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-26 11:40:15,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:40:15,401 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:40:15,401 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:40:15,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:15,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:40:15,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:15,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash 724, now seen corresponding path program 1 times [2023-08-26 11:40:15,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:15,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568774192] [2023-08-26 11:40:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:15,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:15,499 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 11:40:15,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:15,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568774192] [2023-08-26 11:40:15,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568774192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:15,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:15,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:40:15,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512327895] [2023-08-26 11:40:15,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:15,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:40:15,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:15,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:40:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:40:15,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 349 [2023-08-26 11:40:15,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 97 flow. Second operand has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 11:40:15,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:15,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 349 [2023-08-26 11:40:15,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:15,768 INFO L124 PetriNetUnfolderBase]: 1250/1979 cut-off events. [2023-08-26 11:40:15,769 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-26 11:40:15,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3939 conditions, 1979 events. 1250/1979 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9271 event pairs, 994 based on Foata normal form. 0/1117 useless extension candidates. Maximal degree in co-relation 3692. Up to 1920 conditions per place. [2023-08-26 11:40:15,783 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 40 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2023-08-26 11:40:15,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 173 flow [2023-08-26 11:40:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:40:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:40:15,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 358 transitions. [2023-08-26 11:40:15,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128939828080229 [2023-08-26 11:40:15,796 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 358 transitions. [2023-08-26 11:40:15,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 358 transitions. [2023-08-26 11:40:15,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:15,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 358 transitions. [2023-08-26 11:40:15,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states 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 11:40:15,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 11:40:15,806 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 11:40:15,807 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 97 flow. Second operand 2 states and 358 transitions. [2023-08-26 11:40:15,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 173 flow [2023-08-26 11:40:15,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:40:15,811 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 88 flow [2023-08-26 11:40:15,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-26 11:40:15,816 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2023-08-26 11:40:15,816 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 88 flow [2023-08-26 11:40:15,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 11:40:15,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:15,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:40:15,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:40:15,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:15,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash 711364, now seen corresponding path program 1 times [2023-08-26 11:40:15,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:15,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190131550] [2023-08-26 11:40:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:15,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:16,000 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 11:40:16,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:16,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190131550] [2023-08-26 11:40:16,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190131550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:16,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:16,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:40:16,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16492357] [2023-08-26 11:40:16,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:16,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:16,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:16,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:16,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:16,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 349 [2023-08-26 11:40:16,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:16,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:16,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 349 [2023-08-26 11:40:16,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:16,174 INFO L124 PetriNetUnfolderBase]: 1223/1927 cut-off events. [2023-08-26 11:40:16,174 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:40:16,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1927 events. 1223/1927 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8934 event pairs, 972 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 3818. Up to 1868 conditions per place. [2023-08-26 11:40:16,186 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 11:40:16,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 160 flow [2023-08-26 11:40:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-26 11:40:16,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192932187201528 [2023-08-26 11:40:16,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-26 11:40:16,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-26 11:40:16,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:16,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-26 11:40:16,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states 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 11:40:16,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:16,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:16,195 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 88 flow. Second operand 3 states and 439 transitions. [2023-08-26 11:40:16,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 160 flow [2023-08-26 11:40:16,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:40:16,196 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 86 flow [2023-08-26 11:40:16,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-08-26 11:40:16,198 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2023-08-26 11:40:16,198 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 86 flow [2023-08-26 11:40:16,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:16,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:16,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:40:16,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:40:16,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:16,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:16,199 INFO L85 PathProgramCache]: Analyzing trace with hash 711365, now seen corresponding path program 1 times [2023-08-26 11:40:16,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:16,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510150447] [2023-08-26 11:40:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:16,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:16,307 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 11:40:16,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:16,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510150447] [2023-08-26 11:40:16,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510150447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:16,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:16,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:40:16,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347054562] [2023-08-26 11:40:16,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:16,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:16,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:16,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:16,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 349 [2023-08-26 11:40:16,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:16,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:16,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 349 [2023-08-26 11:40:16,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:16,490 INFO L124 PetriNetUnfolderBase]: 1196/1875 cut-off events. [2023-08-26 11:40:16,490 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:40:16,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3720 conditions, 1875 events. 1196/1875 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8614 event pairs, 950 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 3716. Up to 1817 conditions per place. [2023-08-26 11:40:16,498 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 11:40:16,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 154 flow [2023-08-26 11:40:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-26 11:40:16,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42311365807067813 [2023-08-26 11:40:16,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-26 11:40:16,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-26 11:40:16,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:16,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-26 11:40:16,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 11:40:16,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:16,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:16,505 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 86 flow. Second operand 3 states and 443 transitions. [2023-08-26 11:40:16,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 154 flow [2023-08-26 11:40:16,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:16,506 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 83 flow [2023-08-26 11:40:16,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-26 11:40:16,507 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 11:40:16,507 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 83 flow [2023-08-26 11:40:16,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:16,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:16,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:40:16,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:40:16,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:16,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 683639189, now seen corresponding path program 1 times [2023-08-26 11:40:16,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:16,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693140325] [2023-08-26 11:40:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:16,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:16,629 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 11:40:16,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:16,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693140325] [2023-08-26 11:40:16,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693140325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:16,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:16,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:40:16,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508871532] [2023-08-26 11:40:16,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:16,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:40:16,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:40:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:40:16,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 349 [2023-08-26 11:40:16,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 11:40:16,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:16,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 349 [2023-08-26 11:40:16,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:16,777 INFO L124 PetriNetUnfolderBase]: 875/1397 cut-off events. [2023-08-26 11:40:16,778 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:40:16,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2779 conditions, 1397 events. 875/1397 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6146 event pairs, 688 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2775. Up to 1353 conditions per place. [2023-08-26 11:40:16,786 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 11:40:16,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 151 flow [2023-08-26 11:40:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-26 11:40:16,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40974212034383956 [2023-08-26 11:40:16,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-26 11:40:16,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-26 11:40:16,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:16,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-26 11:40:16,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 11:40:16,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:16,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:16,792 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 83 flow. Second operand 3 states and 429 transitions. [2023-08-26 11:40:16,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 151 flow [2023-08-26 11:40:16,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:16,795 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 82 flow [2023-08-26 11:40:16,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-26 11:40:16,796 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 11:40:16,796 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 82 flow [2023-08-26 11:40:16,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 11:40:16,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:16,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:40:16,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:40:16,797 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:16,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 683639188, now seen corresponding path program 1 times [2023-08-26 11:40:16,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:16,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343207346] [2023-08-26 11:40:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:16,900 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 11:40:16,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:16,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343207346] [2023-08-26 11:40:16,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343207346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:16,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:16,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:40:16,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626890901] [2023-08-26 11:40:16,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:16,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:40:16,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:16,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:40:16,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:40:16,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 349 [2023-08-26 11:40:16,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 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 11:40:16,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:16,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 349 [2023-08-26 11:40:16,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:17,015 INFO L124 PetriNetUnfolderBase]: 554/919 cut-off events. [2023-08-26 11:40:17,016 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:40:17,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 919 events. 554/919 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3846 event pairs, 426 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 1834. Up to 889 conditions per place. [2023-08-26 11:40:17,025 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 33 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 11:40:17,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 148 flow [2023-08-26 11:40:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-26 11:40:17,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059216809933142 [2023-08-26 11:40:17,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-26 11:40:17,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-26 11:40:17,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:17,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-26 11:40:17,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:17,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:17,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:17,032 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 3 states and 425 transitions. [2023-08-26 11:40:17,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 148 flow [2023-08-26 11:40:17,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:17,034 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 81 flow [2023-08-26 11:40:17,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 11:40:17,036 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 11:40:17,036 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 81 flow [2023-08-26 11:40:17,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 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 11:40:17,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:17,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:40:17,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:40:17,037 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:17,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash -281769903, now seen corresponding path program 1 times [2023-08-26 11:40:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:17,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556159118] [2023-08-26 11:40:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:17,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:17,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:17,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556159118] [2023-08-26 11:40:17,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556159118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:17,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:17,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:40:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558889528] [2023-08-26 11:40:17,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:17,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:40:17,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:17,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:40:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:40:17,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 349 [2023-08-26 11:40:17,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 11:40:17,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:17,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 349 [2023-08-26 11:40:17,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:17,407 INFO L124 PetriNetUnfolderBase]: 629/1052 cut-off events. [2023-08-26 11:40:17,407 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 11:40:17,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 1052 events. 629/1052 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4940 event pairs, 114 based on Foata normal form. 0/772 useless extension candidates. Maximal degree in co-relation 2099. Up to 668 conditions per place. [2023-08-26 11:40:17,412 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 68 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-08-26 11:40:17,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 75 transitions, 310 flow [2023-08-26 11:40:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:40:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:40:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 724 transitions. [2023-08-26 11:40:17,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41489971346704874 [2023-08-26 11:40:17,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 724 transitions. [2023-08-26 11:40:17,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 724 transitions. [2023-08-26 11:40:17,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:17,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 724 transitions. [2023-08-26 11:40:17,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 11:40:17,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states 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 11:40:17,420 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states 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 11:40:17,420 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 81 flow. Second operand 5 states and 724 transitions. [2023-08-26 11:40:17,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 75 transitions, 310 flow [2023-08-26 11:40:17,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 75 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:17,422 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 90 flow [2023-08-26 11:40:17,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-26 11:40:17,422 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-26 11:40:17,423 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 90 flow [2023-08-26 11:40:17,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 11:40:17,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:17,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:40:17,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:40:17,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:17,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash -281769902, now seen corresponding path program 1 times [2023-08-26 11:40:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:17,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100089925] [2023-08-26 11:40:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:17,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:17,627 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 11:40:17,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:17,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100089925] [2023-08-26 11:40:17,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100089925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:17,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:17,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:40:17,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772698329] [2023-08-26 11:40:17,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:17,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:40:17,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:40:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:40:17,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 349 [2023-08-26 11:40:17,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states 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 11:40:17,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:17,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 349 [2023-08-26 11:40:17,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:17,868 INFO L124 PetriNetUnfolderBase]: 689/1124 cut-off events. [2023-08-26 11:40:17,868 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-26 11:40:17,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 1124 events. 689/1124 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4282 event pairs, 222 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 2404. Up to 883 conditions per place. [2023-08-26 11:40:17,873 INFO L140 encePairwiseOnDemand]: 342/349 looper letters, 61 selfloop transitions, 4 changer transitions 3/68 dead transitions. [2023-08-26 11:40:17,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 299 flow [2023-08-26 11:40:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:40:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:40:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-08-26 11:40:17,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856733524355301 [2023-08-26 11:40:17,876 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-08-26 11:40:17,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-08-26 11:40:17,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:17,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-08-26 11:40:17,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:17,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states 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 11:40:17,881 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states 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 11:40:17,881 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 90 flow. Second operand 5 states and 673 transitions. [2023-08-26 11:40:17,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 299 flow [2023-08-26 11:40:17,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:40:17,885 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 118 flow [2023-08-26 11:40:17,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-26 11:40:17,887 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-26 11:40:17,887 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 118 flow [2023-08-26 11:40:17,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states 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 11:40:17,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:17,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:40:17,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:17,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1293271885, now seen corresponding path program 1 times [2023-08-26 11:40:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442631334] [2023-08-26 11:40:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:17,935 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 11:40:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:17,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442631334] [2023-08-26 11:40:17,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442631334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:17,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:17,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:40:17,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012109551] [2023-08-26 11:40:17,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:17,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:17,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 349 [2023-08-26 11:40:17,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:17,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:17,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 349 [2023-08-26 11:40:17,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:18,062 INFO L124 PetriNetUnfolderBase]: 615/1050 cut-off events. [2023-08-26 11:40:18,063 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-08-26 11:40:18,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 1050 events. 615/1050 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4603 event pairs, 276 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 2395. Up to 918 conditions per place. [2023-08-26 11:40:18,069 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 52 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-26 11:40:18,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 274 flow [2023-08-26 11:40:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-26 11:40:18,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48615090735434574 [2023-08-26 11:40:18,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-26 11:40:18,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-26 11:40:18,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:18,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-26 11:40:18,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 11:40:18,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:18,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:18,075 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 118 flow. Second operand 3 states and 509 transitions. [2023-08-26 11:40:18,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 274 flow [2023-08-26 11:40:18,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:40:18,077 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 129 flow [2023-08-26 11:40:18,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-26 11:40:18,078 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-26 11:40:18,078 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 129 flow [2023-08-26 11:40:18,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:18,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:18,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:18,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:40:18,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:18,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2004663441, now seen corresponding path program 1 times [2023-08-26 11:40:18,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:18,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057967381] [2023-08-26 11:40:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:18,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057967381] [2023-08-26 11:40:18,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057967381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:18,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024300440] [2023-08-26 11:40:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:18,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:18,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:18,521 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 11:40:18,544 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 11:40:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:18,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-26 11:40:18,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:18,739 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 11:40:18,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-26 11:40:18,768 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 11:40:18,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 11:40:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:18,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:19,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024300440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:19,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:19,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-26 11:40:19,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590628788] [2023-08-26 11:40:19,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:19,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 11:40:19,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 11:40:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-26 11:40:19,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 349 [2023-08-26 11:40:19,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 129 flow. Second operand has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states 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 11:40:19,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:19,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 349 [2023-08-26 11:40:19,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:20,387 INFO L124 PetriNetUnfolderBase]: 1693/2768 cut-off events. [2023-08-26 11:40:20,387 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2023-08-26 11:40:20,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6756 conditions, 2768 events. 1693/2768 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12943 event pairs, 192 based on Foata normal form. 66/2402 useless extension candidates. Maximal degree in co-relation 6748. Up to 1025 conditions per place. [2023-08-26 11:40:20,407 INFO L140 encePairwiseOnDemand]: 339/349 looper letters, 195 selfloop transitions, 22 changer transitions 3/220 dead transitions. [2023-08-26 11:40:20,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 220 transitions, 1043 flow [2023-08-26 11:40:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:40:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:40:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1881 transitions. [2023-08-26 11:40:20,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849774866966844 [2023-08-26 11:40:20,421 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1881 transitions. [2023-08-26 11:40:20,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1881 transitions. [2023-08-26 11:40:20,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:20,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1881 transitions. [2023-08-26 11:40:20,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 134.35714285714286) internal successors, (1881), 14 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states 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 11:40:20,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 349.0) internal successors, (5235), 15 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states 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 11:40:20,437 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 349.0) internal successors, (5235), 15 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states 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 11:40:20,438 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 129 flow. Second operand 14 states and 1881 transitions. [2023-08-26 11:40:20,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 220 transitions, 1043 flow [2023-08-26 11:40:20,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 220 transitions, 1034 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:20,444 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 295 flow [2023-08-26 11:40:20,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=295, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-08-26 11:40:20,445 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-08-26 11:40:20,445 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 295 flow [2023-08-26 11:40:20,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states 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 11:40:20,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:20,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:20,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 11:40:20,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:20,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:20,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1318318509, now seen corresponding path program 1 times [2023-08-26 11:40:20,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:20,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001341812] [2023-08-26 11:40:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:20,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:20,714 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 11:40:20,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001341812] [2023-08-26 11:40:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001341812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:20,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:20,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:40:20,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523649940] [2023-08-26 11:40:20,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:20,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:20,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 349 [2023-08-26 11:40:20,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states 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 11:40:20,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:20,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 349 [2023-08-26 11:40:20,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:20,837 INFO L124 PetriNetUnfolderBase]: 509/978 cut-off events. [2023-08-26 11:40:20,837 INFO L125 PetriNetUnfolderBase]: For 868/868 co-relation queries the response was YES. [2023-08-26 11:40:20,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 978 events. 509/978 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4195 event pairs, 86 based on Foata normal form. 42/946 useless extension candidates. Maximal degree in co-relation 2693. Up to 691 conditions per place. [2023-08-26 11:40:20,844 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 46 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2023-08-26 11:40:20,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 384 flow [2023-08-26 11:40:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-26 11:40:20,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46322827125119387 [2023-08-26 11:40:20,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-26 11:40:20,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-26 11:40:20,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:20,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-26 11:40:20,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:20,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:20,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:20,850 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 295 flow. Second operand 3 states and 485 transitions. [2023-08-26 11:40:20,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 384 flow [2023-08-26 11:40:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 352 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-26 11:40:20,857 INFO L231 Difference]: Finished difference. Result has 64 places, 50 transitions, 239 flow [2023-08-26 11:40:20,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=64, PETRI_TRANSITIONS=50} [2023-08-26 11:40:20,858 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-26 11:40:20,858 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 50 transitions, 239 flow [2023-08-26 11:40:20,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states 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 11:40:20,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:20,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:20,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:40:20,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:20,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:20,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1574545704, now seen corresponding path program 1 times [2023-08-26 11:40:20,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:20,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150246499] [2023-08-26 11:40:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:20,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:20,938 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 11:40:20,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150246499] [2023-08-26 11:40:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150246499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:20,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:20,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:40:20,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442179977] [2023-08-26 11:40:20,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:20,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:40:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:20,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:40:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:40:20,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 349 [2023-08-26 11:40:20,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 50 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 129.57142857142858) internal successors, (907), 7 states have internal predecessors, (907), 0 states have call successors, (0), 0 states 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 11:40:20,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:20,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 349 [2023-08-26 11:40:20,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:21,197 INFO L124 PetriNetUnfolderBase]: 647/1228 cut-off events. [2023-08-26 11:40:21,197 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2023-08-26 11:40:21,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3349 conditions, 1228 events. 647/1228 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5381 event pairs, 69 based on Foata normal form. 0/1210 useless extension candidates. Maximal degree in co-relation 3334. Up to 544 conditions per place. [2023-08-26 11:40:21,205 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 67 selfloop transitions, 20 changer transitions 3/94 dead transitions. [2023-08-26 11:40:21,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 589 flow [2023-08-26 11:40:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:40:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:40:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1090 transitions. [2023-08-26 11:40:21,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39040114613180515 [2023-08-26 11:40:21,209 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1090 transitions. [2023-08-26 11:40:21,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1090 transitions. [2023-08-26 11:40:21,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:21,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1090 transitions. [2023-08-26 11:40:21,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.25) internal successors, (1090), 8 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states 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 11:40:21,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states 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 11:40:21,216 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states 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 11:40:21,216 INFO L175 Difference]: Start difference. First operand has 64 places, 50 transitions, 239 flow. Second operand 8 states and 1090 transitions. [2023-08-26 11:40:21,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 589 flow [2023-08-26 11:40:21,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 568 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:21,224 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 339 flow [2023-08-26 11:40:21,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2023-08-26 11:40:21,225 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-26 11:40:21,225 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 339 flow [2023-08-26 11:40:21,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.57142857142858) internal successors, (907), 7 states have internal predecessors, (907), 0 states have call successors, (0), 0 states 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 11:40:21,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:21,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:40:21,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:21,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1686574283, now seen corresponding path program 1 times [2023-08-26 11:40:21,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:21,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702715736] [2023-08-26 11:40:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:21,561 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 11:40:21,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:21,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702715736] [2023-08-26 11:40:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702715736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:21,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:21,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:40:21,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095462458] [2023-08-26 11:40:21,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:21,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:40:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:40:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:40:21,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 11:40:21,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 339 flow. Second operand has 13 states, 13 states have (on average 112.46153846153847) internal successors, (1462), 13 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states 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 11:40:21,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:21,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 11:40:21,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:22,269 INFO L124 PetriNetUnfolderBase]: 874/1589 cut-off events. [2023-08-26 11:40:22,269 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2023-08-26 11:40:22,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1589 events. 874/1589 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7195 event pairs, 192 based on Foata normal form. 12/1537 useless extension candidates. Maximal degree in co-relation 4519. Up to 944 conditions per place. [2023-08-26 11:40:22,279 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 138 selfloop transitions, 16 changer transitions 3/157 dead transitions. [2023-08-26 11:40:22,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 157 transitions, 984 flow [2023-08-26 11:40:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 11:40:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 11:40:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1588 transitions. [2023-08-26 11:40:22,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3500110204981265 [2023-08-26 11:40:22,284 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1588 transitions. [2023-08-26 11:40:22,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1588 transitions. [2023-08-26 11:40:22,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:22,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1588 transitions. [2023-08-26 11:40:22,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 122.15384615384616) internal successors, (1588), 13 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 11:40:22,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states 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 11:40:22,294 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states 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 11:40:22,294 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 339 flow. Second operand 13 states and 1588 transitions. [2023-08-26 11:40:22,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 157 transitions, 984 flow [2023-08-26 11:40:22,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 157 transitions, 916 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-26 11:40:22,302 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 414 flow [2023-08-26 11:40:22,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=414, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2023-08-26 11:40:22,303 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 39 predicate places. [2023-08-26 11:40:22,303 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 414 flow [2023-08-26 11:40:22,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 112.46153846153847) internal successors, (1462), 13 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states 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 11:40:22,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:22,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 11:40:22,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:40:22,305 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:22,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1145158303, now seen corresponding path program 1 times [2023-08-26 11:40:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:22,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713244715] [2023-08-26 11:40:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:22,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:22,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713244715] [2023-08-26 11:40:22,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713244715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:22,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735429941] [2023-08-26 11:40:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:22,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:22,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:22,409 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 11:40:22,434 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 11:40:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:22,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 11:40:22,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:22,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:22,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735429941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:22,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:22,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-26 11:40:22,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310777283] [2023-08-26 11:40:22,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:22,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 11:40:22,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:22,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 11:40:22,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-26 11:40:22,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 349 [2023-08-26 11:40:22,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 414 flow. Second operand has 14 states, 14 states have (on average 146.42857142857142) internal successors, (2050), 14 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states 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 11:40:22,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:22,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 349 [2023-08-26 11:40:22,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:23,160 INFO L124 PetriNetUnfolderBase]: 1748/3197 cut-off events. [2023-08-26 11:40:23,161 INFO L125 PetriNetUnfolderBase]: For 2452/2452 co-relation queries the response was YES. [2023-08-26 11:40:23,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9365 conditions, 3197 events. 1748/3197 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15295 event pairs, 452 based on Foata normal form. 92/3249 useless extension candidates. Maximal degree in co-relation 9341. Up to 756 conditions per place. [2023-08-26 11:40:23,183 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 196 selfloop transitions, 41 changer transitions 3/240 dead transitions. [2023-08-26 11:40:23,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 240 transitions, 1690 flow [2023-08-26 11:40:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 11:40:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 11:40:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2049 transitions. [2023-08-26 11:40:23,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45162001322459777 [2023-08-26 11:40:23,189 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2049 transitions. [2023-08-26 11:40:23,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2049 transitions. [2023-08-26 11:40:23,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:23,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2049 transitions. [2023-08-26 11:40:23,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 157.6153846153846) internal successors, (2049), 13 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states 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 11:40:23,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states 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 11:40:23,201 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states 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 11:40:23,202 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 414 flow. Second operand 13 states and 2049 transitions. [2023-08-26 11:40:23,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 240 transitions, 1690 flow [2023-08-26 11:40:23,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 240 transitions, 1674 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 11:40:23,216 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 801 flow [2023-08-26 11:40:23,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=801, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2023-08-26 11:40:23,217 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2023-08-26 11:40:23,217 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 801 flow [2023-08-26 11:40:23,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 146.42857142857142) internal successors, (2050), 14 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states 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 11:40:23,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:23,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:23,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 11:40:23,424 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,SelfDestructingSolverStorable12 [2023-08-26 11:40:23,424 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:23,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash -309886205, now seen corresponding path program 1 times [2023-08-26 11:40:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:23,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022169477] [2023-08-26 11:40:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:23,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:24,013 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 11:40:24,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:24,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022169477] [2023-08-26 11:40:24,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022169477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:24,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:24,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 11:40:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324793497] [2023-08-26 11:40:24,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:24,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 11:40:24,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 11:40:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-26 11:40:24,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 11:40:24,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 801 flow. Second operand has 15 states, 15 states have (on average 106.4) internal successors, (1596), 15 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 11:40:24,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:24,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 11:40:24,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:25,355 INFO L124 PetriNetUnfolderBase]: 2012/3687 cut-off events. [2023-08-26 11:40:25,356 INFO L125 PetriNetUnfolderBase]: For 4642/4642 co-relation queries the response was YES. [2023-08-26 11:40:25,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11685 conditions, 3687 events. 2012/3687 cut-off events. For 4642/4642 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 18482 event pairs, 626 based on Foata normal form. 0/3643 useless extension candidates. Maximal degree in co-relation 11653. Up to 3035 conditions per place. [2023-08-26 11:40:25,384 INFO L140 encePairwiseOnDemand]: 333/349 looper letters, 173 selfloop transitions, 27 changer transitions 4/204 dead transitions. [2023-08-26 11:40:25,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 204 transitions, 1609 flow [2023-08-26 11:40:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 11:40:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 11:40:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2033 transitions. [2023-08-26 11:40:25,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3236230499840815 [2023-08-26 11:40:25,391 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2033 transitions. [2023-08-26 11:40:25,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2033 transitions. [2023-08-26 11:40:25,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:25,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2033 transitions. [2023-08-26 11:40:25,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.94444444444444) internal successors, (2033), 18 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states 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 11:40:25,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 349.0) internal successors, (6631), 19 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states 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 11:40:25,404 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 349.0) internal successors, (6631), 19 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states 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 11:40:25,404 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 801 flow. Second operand 18 states and 2033 transitions. [2023-08-26 11:40:25,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 204 transitions, 1609 flow [2023-08-26 11:40:25,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 1524 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-08-26 11:40:25,431 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 943 flow [2023-08-26 11:40:25,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=943, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2023-08-26 11:40:25,432 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2023-08-26 11:40:25,432 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 943 flow [2023-08-26 11:40:25,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.4) internal successors, (1596), 15 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 11:40:25,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:25,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:25,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:40:25,433 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:25,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:25,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1697843001, now seen corresponding path program 2 times [2023-08-26 11:40:25,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:25,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131087799] [2023-08-26 11:40:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:25,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:26,033 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 11:40:26,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:26,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131087799] [2023-08-26 11:40:26,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131087799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:26,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:26,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 11:40:26,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988200347] [2023-08-26 11:40:26,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:26,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 11:40:26,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:26,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 11:40:26,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-26 11:40:26,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 349 [2023-08-26 11:40:26,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 943 flow. Second operand has 11 states, 11 states have (on average 107.81818181818181) internal successors, (1186), 11 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 11:40:26,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:26,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 349 [2023-08-26 11:40:26,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:27,291 INFO L124 PetriNetUnfolderBase]: 2006/3833 cut-off events. [2023-08-26 11:40:27,291 INFO L125 PetriNetUnfolderBase]: For 4290/4290 co-relation queries the response was YES. [2023-08-26 11:40:27,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11932 conditions, 3833 events. 2006/3833 cut-off events. For 4290/4290 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 20709 event pairs, 611 based on Foata normal form. 0/3776 useless extension candidates. Maximal degree in co-relation 11893. Up to 2244 conditions per place. [2023-08-26 11:40:27,320 INFO L140 encePairwiseOnDemand]: 340/349 looper letters, 145 selfloop transitions, 19 changer transitions 3/184 dead transitions. [2023-08-26 11:40:27,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 184 transitions, 1509 flow [2023-08-26 11:40:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:40:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:40:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1062 transitions. [2023-08-26 11:40:27,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33810888252148996 [2023-08-26 11:40:27,324 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1062 transitions. [2023-08-26 11:40:27,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1062 transitions. [2023-08-26 11:40:27,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:27,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1062 transitions. [2023-08-26 11:40:27,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.0) internal successors, (1062), 9 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 11:40:27,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states 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 11:40:27,332 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states 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 11:40:27,333 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 943 flow. Second operand 9 states and 1062 transitions. [2023-08-26 11:40:27,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 184 transitions, 1509 flow [2023-08-26 11:40:27,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 184 transitions, 1498 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:40:27,357 INFO L231 Difference]: Finished difference. Result has 130 places, 125 transitions, 1007 flow [2023-08-26 11:40:27,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1007, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2023-08-26 11:40:27,358 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2023-08-26 11:40:27,358 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 1007 flow [2023-08-26 11:40:27,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 107.81818181818181) internal successors, (1186), 11 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 11:40:27,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:27,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:27,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:40:27,358 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:27,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -623392431, now seen corresponding path program 1 times [2023-08-26 11:40:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938396124] [2023-08-26 11:40:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-26 11:40:27,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:27,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938396124] [2023-08-26 11:40:27,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938396124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:27,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:27,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:40:27,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952954438] [2023-08-26 11:40:27,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:27,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:40:27,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:27,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:40:27,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:40:27,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 349 [2023-08-26 11:40:27,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 1007 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 11:40:27,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:27,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 349 [2023-08-26 11:40:27,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:27,967 INFO L124 PetriNetUnfolderBase]: 2146/3975 cut-off events. [2023-08-26 11:40:27,968 INFO L125 PetriNetUnfolderBase]: For 4845/4845 co-relation queries the response was YES. [2023-08-26 11:40:27,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12794 conditions, 3975 events. 2146/3975 cut-off events. For 4845/4845 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 20550 event pairs, 1342 based on Foata normal form. 90/4035 useless extension candidates. Maximal degree in co-relation 12752. Up to 2912 conditions per place. [2023-08-26 11:40:27,994 INFO L140 encePairwiseOnDemand]: 343/349 looper letters, 116 selfloop transitions, 18 changer transitions 0/134 dead transitions. [2023-08-26 11:40:27,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 134 transitions, 1289 flow [2023-08-26 11:40:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:40:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:40:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-26 11:40:27,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670487106017192 [2023-08-26 11:40:27,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-26 11:40:27,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-26 11:40:27,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:27,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-26 11:40:27,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:40:27,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:27,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:40:27,999 INFO L175 Difference]: Start difference. First operand has 130 places, 125 transitions, 1007 flow. Second operand 3 states and 489 transitions. [2023-08-26 11:40:27,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 134 transitions, 1289 flow [2023-08-26 11:40:28,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 134 transitions, 1252 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 11:40:28,021 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 981 flow [2023-08-26 11:40:28,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=981, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-08-26 11:40:28,022 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2023-08-26 11:40:28,022 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 981 flow [2023-08-26 11:40:28,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 11:40:28,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:28,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:40:28,023 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:28,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 449939420, now seen corresponding path program 1 times [2023-08-26 11:40:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289212954] [2023-08-26 11:40:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:28,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:28,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289212954] [2023-08-26 11:40:28,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289212954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:28,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227169335] [2023-08-26 11:40:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:28,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:28,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:28,297 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 11:40:28,300 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 11:40:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:28,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-26 11:40:28,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:28,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:29,051 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:40:29,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-08-26 11:40:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227169335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:29,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:29,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-26 11:40:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690344270] [2023-08-26 11:40:29,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-26 11:40:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-26 11:40:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-08-26 11:40:29,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 349 [2023-08-26 11:40:29,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 981 flow. Second operand has 35 states, 35 states have (on average 111.05714285714286) internal successors, (3887), 35 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states 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 11:40:29,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:29,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 349 [2023-08-26 11:40:29,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:32,527 INFO L124 PetriNetUnfolderBase]: 2472/4573 cut-off events. [2023-08-26 11:40:32,527 INFO L125 PetriNetUnfolderBase]: For 7494/7494 co-relation queries the response was YES. [2023-08-26 11:40:32,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14896 conditions, 4573 events. 2472/4573 cut-off events. For 7494/7494 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24693 event pairs, 240 based on Foata normal form. 72/4605 useless extension candidates. Maximal degree in co-relation 14853. Up to 1172 conditions per place. [2023-08-26 11:40:32,556 INFO L140 encePairwiseOnDemand]: 334/349 looper letters, 201 selfloop transitions, 104 changer transitions 3/308 dead transitions. [2023-08-26 11:40:32,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 308 transitions, 2324 flow [2023-08-26 11:40:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-26 11:40:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-26 11:40:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4047 transitions. [2023-08-26 11:40:32,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33131395824805565 [2023-08-26 11:40:32,563 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4047 transitions. [2023-08-26 11:40:32,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4047 transitions. [2023-08-26 11:40:32,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:32,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4047 transitions. [2023-08-26 11:40:32,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 115.62857142857143) internal successors, (4047), 35 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states 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 11:40:32,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 349.0) internal successors, (12564), 36 states have internal predecessors, (12564), 0 states have call successors, (0), 0 states 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 11:40:32,586 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 349.0) internal successors, (12564), 36 states have internal predecessors, (12564), 0 states have call successors, (0), 0 states 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 11:40:32,586 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 981 flow. Second operand 35 states and 4047 transitions. [2023-08-26 11:40:32,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 308 transitions, 2324 flow [2023-08-26 11:40:32,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 308 transitions, 2244 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-08-26 11:40:32,620 INFO L231 Difference]: Finished difference. Result has 163 places, 147 transitions, 1391 flow [2023-08-26 11:40:32,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1391, PETRI_PLACES=163, PETRI_TRANSITIONS=147} [2023-08-26 11:40:32,620 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 117 predicate places. [2023-08-26 11:40:32,620 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 147 transitions, 1391 flow [2023-08-26 11:40:32,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 111.05714285714286) internal successors, (3887), 35 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states 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 11:40:32,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:32,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:32,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 11:40:32,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:32,828 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:32,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash -726554869, now seen corresponding path program 1 times [2023-08-26 11:40:32,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:32,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372212679] [2023-08-26 11:40:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:32,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372212679] [2023-08-26 11:40:32,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372212679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334977179] [2023-08-26 11:40:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:32,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:32,930 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 11:40:32,960 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 11:40:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:33,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 11:40:33,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:40:33,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 11:40:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334977179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:33,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 11:40:33,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-26 11:40:33,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240892150] [2023-08-26 11:40:33,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:33,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:40:33,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:40:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 11:40:33,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2023-08-26 11:40:33,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 147 transitions, 1391 flow. Second operand has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 11:40:33,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:33,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2023-08-26 11:40:33,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:33,751 INFO L124 PetriNetUnfolderBase]: 2210/4111 cut-off events. [2023-08-26 11:40:33,752 INFO L125 PetriNetUnfolderBase]: For 7743/7743 co-relation queries the response was YES. [2023-08-26 11:40:33,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14545 conditions, 4111 events. 2210/4111 cut-off events. For 7743/7743 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 21411 event pairs, 760 based on Foata normal form. 34/4111 useless extension candidates. Maximal degree in co-relation 14499. Up to 2154 conditions per place. [2023-08-26 11:40:33,776 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 175 selfloop transitions, 30 changer transitions 0/205 dead transitions. [2023-08-26 11:40:33,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 205 transitions, 2142 flow [2023-08-26 11:40:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:40:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:40:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 933 transitions. [2023-08-26 11:40:33,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455587392550143 [2023-08-26 11:40:33,779 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 933 transitions. [2023-08-26 11:40:33,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 933 transitions. [2023-08-26 11:40:33,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:33,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 933 transitions. [2023-08-26 11:40:33,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 11:40:33,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states 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 11:40:33,783 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states 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 11:40:33,783 INFO L175 Difference]: Start difference. First operand has 163 places, 147 transitions, 1391 flow. Second operand 6 states and 933 transitions. [2023-08-26 11:40:33,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 205 transitions, 2142 flow [2023-08-26 11:40:33,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 205 transitions, 1803 flow, removed 107 selfloop flow, removed 15 redundant places. [2023-08-26 11:40:33,836 INFO L231 Difference]: Finished difference. Result has 156 places, 149 transitions, 1231 flow [2023-08-26 11:40:33,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1231, PETRI_PLACES=156, PETRI_TRANSITIONS=149} [2023-08-26 11:40:33,837 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 110 predicate places. [2023-08-26 11:40:33,837 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 149 transitions, 1231 flow [2023-08-26 11:40:33,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 11:40:33,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:33,837 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-26 11:40:33,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-26 11:40:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 11:40:34,043 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:34,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1761919503, now seen corresponding path program 2 times [2023-08-26 11:40:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:34,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77197321] [2023-08-26 11:40:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:34,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77197321] [2023-08-26 11:40:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77197321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150121195] [2023-08-26 11:40:34,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 11:40:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:34,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:34,762 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 11:40:34,765 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 11:40:34,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:40:34,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:40:34,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-26 11:40:34,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:34,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:34,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:34,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-26 11:40:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:35,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:35,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150121195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:35,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:35,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 35 [2023-08-26 11:40:35,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260216529] [2023-08-26 11:40:35,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-26 11:40:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-26 11:40:35,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2023-08-26 11:40:35,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 349 [2023-08-26 11:40:35,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 149 transitions, 1231 flow. Second operand has 37 states, 37 states have (on average 118.1891891891892) internal successors, (4373), 37 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states 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 11:40:35,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:35,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 349 [2023-08-26 11:40:35,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:38,791 INFO L124 PetriNetUnfolderBase]: 3120/5793 cut-off events. [2023-08-26 11:40:38,791 INFO L125 PetriNetUnfolderBase]: For 8715/8715 co-relation queries the response was YES. [2023-08-26 11:40:38,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19365 conditions, 5793 events. 3120/5793 cut-off events. For 8715/8715 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 30385 event pairs, 902 based on Foata normal form. 68/5767 useless extension candidates. Maximal degree in co-relation 19320. Up to 3170 conditions per place. [2023-08-26 11:40:38,843 INFO L140 encePairwiseOnDemand]: 340/349 looper letters, 351 selfloop transitions, 64 changer transitions 6/421 dead transitions. [2023-08-26 11:40:38,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 421 transitions, 3436 flow [2023-08-26 11:40:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-26 11:40:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-26 11:40:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3548 transitions. [2023-08-26 11:40:38,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36307818256242325 [2023-08-26 11:40:38,848 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3548 transitions. [2023-08-26 11:40:38,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3548 transitions. [2023-08-26 11:40:38,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:38,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3548 transitions. [2023-08-26 11:40:38,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 126.71428571428571) internal successors, (3548), 28 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states 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 11:40:38,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 349.0) internal successors, (10121), 29 states have internal predecessors, (10121), 0 states have call successors, (0), 0 states 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 11:40:38,866 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 349.0) internal successors, (10121), 29 states have internal predecessors, (10121), 0 states have call successors, (0), 0 states 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 11:40:38,866 INFO L175 Difference]: Start difference. First operand has 156 places, 149 transitions, 1231 flow. Second operand 28 states and 3548 transitions. [2023-08-26 11:40:38,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 421 transitions, 3436 flow [2023-08-26 11:40:38,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 421 transitions, 3402 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-26 11:40:38,934 INFO L231 Difference]: Finished difference. Result has 192 places, 193 transitions, 1884 flow [2023-08-26 11:40:38,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1884, PETRI_PLACES=192, PETRI_TRANSITIONS=193} [2023-08-26 11:40:38,934 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 146 predicate places. [2023-08-26 11:40:38,935 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 193 transitions, 1884 flow [2023-08-26 11:40:38,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 118.1891891891892) internal successors, (4373), 37 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states 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 11:40:38,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:38,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:38,947 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 11:40:39,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:39,142 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:39,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:39,143 INFO L85 PathProgramCache]: Analyzing trace with hash 467836902, now seen corresponding path program 3 times [2023-08-26 11:40:39,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:39,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838024070] [2023-08-26 11:40:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:39,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:40:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:39,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838024070] [2023-08-26 11:40:39,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838024070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:40:39,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:40:39,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 11:40:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896753254] [2023-08-26 11:40:39,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:39,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 11:40:39,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 11:40:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-26 11:40:39,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 11:40:39,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 193 transitions, 1884 flow. Second operand has 15 states, 15 states have (on average 106.86666666666666) internal successors, (1603), 15 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states 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 11:40:39,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:39,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 11:40:39,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:42,219 INFO L124 PetriNetUnfolderBase]: 5142/9518 cut-off events. [2023-08-26 11:40:42,219 INFO L125 PetriNetUnfolderBase]: For 20746/20746 co-relation queries the response was YES. [2023-08-26 11:40:42,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33831 conditions, 9518 events. 5142/9518 cut-off events. For 20746/20746 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 57340 event pairs, 960 based on Foata normal form. 0/9384 useless extension candidates. Maximal degree in co-relation 33776. Up to 2188 conditions per place. [2023-08-26 11:40:42,283 INFO L140 encePairwiseOnDemand]: 330/349 looper letters, 188 selfloop transitions, 277 changer transitions 4/469 dead transitions. [2023-08-26 11:40:42,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 469 transitions, 4777 flow [2023-08-26 11:40:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 11:40:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 11:40:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3662 transitions. [2023-08-26 11:40:42,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3179647477641747 [2023-08-26 11:40:42,289 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3662 transitions. [2023-08-26 11:40:42,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3662 transitions. [2023-08-26 11:40:42,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:42,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3662 transitions. [2023-08-26 11:40:42,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 110.96969696969697) internal successors, (3662), 33 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states 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 11:40:42,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 349.0) internal successors, (11866), 34 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states 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 11:40:42,302 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 349.0) internal successors, (11866), 34 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states 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 11:40:42,302 INFO L175 Difference]: Start difference. First operand has 192 places, 193 transitions, 1884 flow. Second operand 33 states and 3662 transitions. [2023-08-26 11:40:42,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 469 transitions, 4777 flow [2023-08-26 11:40:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 469 transitions, 4545 flow, removed 88 selfloop flow, removed 10 redundant places. [2023-08-26 11:40:42,433 INFO L231 Difference]: Finished difference. Result has 221 places, 340 transitions, 3956 flow [2023-08-26 11:40:42,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3956, PETRI_PLACES=221, PETRI_TRANSITIONS=340} [2023-08-26 11:40:42,433 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 175 predicate places. [2023-08-26 11:40:42,433 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 340 transitions, 3956 flow [2023-08-26 11:40:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.86666666666666) internal successors, (1603), 15 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states 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 11:40:42,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:42,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:42,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:40:42,434 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:42,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2038868506, now seen corresponding path program 4 times [2023-08-26 11:40:42,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:42,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100123510] [2023-08-26 11:40:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:43,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:43,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100123510] [2023-08-26 11:40:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100123510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:43,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563395494] [2023-08-26 11:40:43,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 11:40:43,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:43,251 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 11:40:43,253 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 11:40:43,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 11:40:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:40:43,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-26 11:40:43,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:43,392 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 11:40:43,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 11:40:43,690 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 11:40:43,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 11:40:44,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-26 11:40:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:44,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:44,649 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:40:44,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-26 11:40:44,664 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:40:44,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-26 11:40:44,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-26 11:40:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:40:44,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563395494] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:44,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 11:40:44,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16, 16] total 46 [2023-08-26 11:40:44,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412251317] [2023-08-26 11:40:44,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:40:44,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:40:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:40:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2076, Unknown=19, NotChecked=0, Total=2256 [2023-08-26 11:40:44,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 349 [2023-08-26 11:40:44,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 340 transitions, 3956 flow. Second operand has 16 states, 16 states have (on average 98.75) internal successors, (1580), 16 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 11:40:44,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:44,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 349 [2023-08-26 11:40:44,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:54,173 INFO L124 PetriNetUnfolderBase]: 5757/10655 cut-off events. [2023-08-26 11:40:54,173 INFO L125 PetriNetUnfolderBase]: For 26332/26332 co-relation queries the response was YES. [2023-08-26 11:40:54,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41651 conditions, 10655 events. 5757/10655 cut-off events. For 26332/26332 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 65128 event pairs, 628 based on Foata normal form. 0/10505 useless extension candidates. Maximal degree in co-relation 41588. Up to 3329 conditions per place. [2023-08-26 11:40:54,391 INFO L140 encePairwiseOnDemand]: 326/349 looper letters, 166 selfloop transitions, 346 changer transitions 3/515 dead transitions. [2023-08-26 11:40:54,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 515 transitions, 5918 flow [2023-08-26 11:40:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 11:40:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 11:40:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3396 transitions. [2023-08-26 11:40:54,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29486845532690803 [2023-08-26 11:40:54,398 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3396 transitions. [2023-08-26 11:40:54,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3396 transitions. [2023-08-26 11:40:54,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:54,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3396 transitions. [2023-08-26 11:40:54,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 102.9090909090909) internal successors, (3396), 33 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states 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 11:40:54,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 349.0) internal successors, (11866), 34 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states 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 11:40:54,412 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 349.0) internal successors, (11866), 34 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states 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 11:40:54,412 INFO L175 Difference]: Start difference. First operand has 221 places, 340 transitions, 3956 flow. Second operand 33 states and 3396 transitions. [2023-08-26 11:40:54,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 515 transitions, 5918 flow [2023-08-26 11:40:54,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 515 transitions, 5785 flow, removed 50 selfloop flow, removed 7 redundant places. [2023-08-26 11:40:54,619 INFO L231 Difference]: Finished difference. Result has 250 places, 394 transitions, 5174 flow [2023-08-26 11:40:54,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=3828, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5174, PETRI_PLACES=250, PETRI_TRANSITIONS=394} [2023-08-26 11:40:54,620 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 204 predicate places. [2023-08-26 11:40:54,620 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 394 transitions, 5174 flow [2023-08-26 11:40:54,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 98.75) internal successors, (1580), 16 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 11:40:54,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:54,621 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:54,629 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 11:40:54,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:54,827 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:54,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:54,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1613710002, now seen corresponding path program 2 times [2023-08-26 11:40:54,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:54,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551929951] [2023-08-26 11:40:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:54,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:40:54,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:54,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551929951] [2023-08-26 11:40:54,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551929951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:54,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023918843] [2023-08-26 11:40:54,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 11:40:54,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:54,941 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 11:40:54,944 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 11:40:55,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:40:55,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:40:55,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 11:40:55,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:40:55,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:40:55,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023918843] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:55,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:55,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 11:40:55,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734010535] [2023-08-26 11:40:55,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:55,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:40:55,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:55,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:40:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:40:55,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2023-08-26 11:40:55,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 394 transitions, 5174 flow. Second operand has 16 states, 16 states have (on average 145.4375) internal successors, (2327), 16 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states 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 11:40:55,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:55,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2023-08-26 11:40:55,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:40:57,476 INFO L124 PetriNetUnfolderBase]: 6043/11187 cut-off events. [2023-08-26 11:40:57,476 INFO L125 PetriNetUnfolderBase]: For 37158/37158 co-relation queries the response was YES. [2023-08-26 11:40:57,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51222 conditions, 11187 events. 6043/11187 cut-off events. For 37158/37158 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 69170 event pairs, 1492 based on Foata normal form. 48/11073 useless extension candidates. Maximal degree in co-relation 51155. Up to 4146 conditions per place. [2023-08-26 11:40:57,558 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 402 selfloop transitions, 221 changer transitions 6/629 dead transitions. [2023-08-26 11:40:57,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 629 transitions, 8688 flow [2023-08-26 11:40:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 11:40:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 11:40:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2566 transitions. [2023-08-26 11:40:57,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43249620765211527 [2023-08-26 11:40:57,562 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2566 transitions. [2023-08-26 11:40:57,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2566 transitions. [2023-08-26 11:40:57,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:40:57,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2566 transitions. [2023-08-26 11:40:57,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 150.94117647058823) internal successors, (2566), 17 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states 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 11:40:57,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 349.0) internal successors, (6282), 18 states have internal predecessors, (6282), 0 states have call successors, (0), 0 states 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 11:40:57,570 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 349.0) internal successors, (6282), 18 states have internal predecessors, (6282), 0 states have call successors, (0), 0 states 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 11:40:57,570 INFO L175 Difference]: Start difference. First operand has 250 places, 394 transitions, 5174 flow. Second operand 17 states and 2566 transitions. [2023-08-26 11:40:57,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 629 transitions, 8688 flow [2023-08-26 11:40:57,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 629 transitions, 8241 flow, removed 121 selfloop flow, removed 12 redundant places. [2023-08-26 11:40:57,804 INFO L231 Difference]: Finished difference. Result has 250 places, 402 transitions, 5730 flow [2023-08-26 11:40:57,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=4677, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5730, PETRI_PLACES=250, PETRI_TRANSITIONS=402} [2023-08-26 11:40:57,804 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 204 predicate places. [2023-08-26 11:40:57,804 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 402 transitions, 5730 flow [2023-08-26 11:40:57,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.4375) internal successors, (2327), 16 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states 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 11:40:57,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:40:57,805 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:40:57,810 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 11:40:58,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:58,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:40:58,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:40:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1602513755, now seen corresponding path program 2 times [2023-08-26 11:40:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:40:58,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782488472] [2023-08-26 11:40:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:40:58,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:40:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:40:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:58,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:40:58,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782488472] [2023-08-26 11:40:58,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782488472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:40:58,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102669688] [2023-08-26 11:40:58,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 11:40:58,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:40:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:40:58,678 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 11:40:58,681 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 11:40:58,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:40:58,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:40:58,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-26 11:40:58,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:40:58,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:58,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:40:58,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-26 11:40:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:59,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:40:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:40:59,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102669688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:40:59,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:40:59,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 35 [2023-08-26 11:40:59,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106730564] [2023-08-26 11:40:59,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:40:59,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-26 11:40:59,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:40:59,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-26 11:40:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-08-26 11:40:59,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 349 [2023-08-26 11:40:59,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 402 transitions, 5730 flow. Second operand has 37 states, 37 states have (on average 110.51351351351352) internal successors, (4089), 37 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states 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 11:40:59,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:40:59,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 349 [2023-08-26 11:40:59,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:04,263 INFO L124 PetriNetUnfolderBase]: 7447/13831 cut-off events. [2023-08-26 11:41:04,263 INFO L125 PetriNetUnfolderBase]: For 46761/46761 co-relation queries the response was YES. [2023-08-26 11:41:04,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63268 conditions, 13831 events. 7447/13831 cut-off events. For 46761/46761 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 91642 event pairs, 2339 based on Foata normal form. 24/13718 useless extension candidates. Maximal degree in co-relation 63200. Up to 7907 conditions per place. [2023-08-26 11:41:04,364 INFO L140 encePairwiseOnDemand]: 337/349 looper letters, 573 selfloop transitions, 149 changer transitions 27/749 dead transitions. [2023-08-26 11:41:04,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 749 transitions, 10231 flow [2023-08-26 11:41:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-26 11:41:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-26 11:41:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3609 transitions. [2023-08-26 11:41:04,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3335798132914317 [2023-08-26 11:41:04,369 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3609 transitions. [2023-08-26 11:41:04,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3609 transitions. [2023-08-26 11:41:04,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:04,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3609 transitions. [2023-08-26 11:41:04,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 116.41935483870968) internal successors, (3609), 31 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states 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 11:41:04,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 349.0) internal successors, (11168), 32 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states 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 11:41:04,379 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 349.0) internal successors, (11168), 32 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states 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 11:41:04,379 INFO L175 Difference]: Start difference. First operand has 250 places, 402 transitions, 5730 flow. Second operand 31 states and 3609 transitions. [2023-08-26 11:41:04,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 749 transitions, 10231 flow [2023-08-26 11:41:04,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 749 transitions, 9999 flow, removed 54 selfloop flow, removed 6 redundant places. [2023-08-26 11:41:04,626 INFO L231 Difference]: Finished difference. Result has 286 places, 488 transitions, 7335 flow [2023-08-26 11:41:04,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7335, PETRI_PLACES=286, PETRI_TRANSITIONS=488} [2023-08-26 11:41:04,627 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 240 predicate places. [2023-08-26 11:41:04,627 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 488 transitions, 7335 flow [2023-08-26 11:41:04,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 110.51351351351352) internal successors, (4089), 37 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states 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 11:41:04,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:04,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:04,637 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 11:41:04,833 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,SelfDestructingSolverStorable22 [2023-08-26 11:41:04,834 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:41:04,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:04,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1694961628, now seen corresponding path program 1 times [2023-08-26 11:41:04,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:04,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040120493] [2023-08-26 11:41:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:04,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040120493] [2023-08-26 11:41:05,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040120493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980339025] [2023-08-26 11:41:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:05,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:05,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:05,990 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 11:41:05,992 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 11:41:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:06,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-26 11:41:06,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:06,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 11:41:06,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-26 11:41:07,084 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 11:41:07,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 32 [2023-08-26 11:41:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:07,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:08,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-08-26 11:41:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:08,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980339025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:08,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:08,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 60 [2023-08-26 11:41:08,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337883503] [2023-08-26 11:41:08,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:08,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-08-26 11:41:08,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:08,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-08-26 11:41:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2023-08-26 11:41:08,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 11:41:08,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 488 transitions, 7335 flow. Second operand has 62 states, 62 states have (on average 106.74193548387096) internal successors, (6618), 62 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states 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 11:41:08,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:08,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 11:41:08,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:24,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:41:38,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:41:45,169 INFO L124 PetriNetUnfolderBase]: 12727/23781 cut-off events. [2023-08-26 11:41:45,169 INFO L125 PetriNetUnfolderBase]: For 87422/87422 co-relation queries the response was YES. [2023-08-26 11:41:45,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108480 conditions, 23781 events. 12727/23781 cut-off events. For 87422/87422 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 169762 event pairs, 2814 based on Foata normal form. 106/23802 useless extension candidates. Maximal degree in co-relation 108402. Up to 8236 conditions per place. [2023-08-26 11:41:45,489 INFO L140 encePairwiseOnDemand]: 329/349 looper letters, 729 selfloop transitions, 607 changer transitions 157/1493 dead transitions. [2023-08-26 11:41:45,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1493 transitions, 19340 flow [2023-08-26 11:41:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-08-26 11:41:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2023-08-26 11:41:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 14671 transitions. [2023-08-26 11:41:45,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31606954348622274 [2023-08-26 11:41:45,509 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 14671 transitions. [2023-08-26 11:41:45,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 14671 transitions. [2023-08-26 11:41:45,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:45,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 14671 transitions. [2023-08-26 11:41:45,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 110.30827067669173) internal successors, (14671), 133 states have internal predecessors, (14671), 0 states have call successors, (0), 0 states 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 11:41:45,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 349.0) internal successors, (46766), 134 states have internal predecessors, (46766), 0 states have call successors, (0), 0 states 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 11:41:45,577 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 349.0) internal successors, (46766), 134 states have internal predecessors, (46766), 0 states have call successors, (0), 0 states 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 11:41:45,577 INFO L175 Difference]: Start difference. First operand has 286 places, 488 transitions, 7335 flow. Second operand 133 states and 14671 transitions. [2023-08-26 11:41:45,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1493 transitions, 19340 flow [2023-08-26 11:41:46,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1493 transitions, 19126 flow, removed 78 selfloop flow, removed 10 redundant places. [2023-08-26 11:41:46,163 INFO L231 Difference]: Finished difference. Result has 448 places, 984 transitions, 15970 flow [2023-08-26 11:41:46,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=7211, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=15970, PETRI_PLACES=448, PETRI_TRANSITIONS=984} [2023-08-26 11:41:46,163 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 402 predicate places. [2023-08-26 11:41:46,164 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 984 transitions, 15970 flow [2023-08-26 11:41:46,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 106.74193548387096) internal successors, (6618), 62 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states 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 11:41:46,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:46,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:46,170 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 11:41:46,365 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,SelfDestructingSolverStorable23 [2023-08-26 11:41:46,365 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:41:46,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:46,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1429512368, now seen corresponding path program 2 times [2023-08-26 11:41:46,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:46,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646812665] [2023-08-26 11:41:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:46,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:48,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:48,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646812665] [2023-08-26 11:41:48,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646812665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:48,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206219375] [2023-08-26 11:41:48,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 11:41:48,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:48,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:48,397 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 11:41:48,400 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 11:41:48,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:41:48,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:48,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 85 conjunts are in the unsatisfiable core [2023-08-26 11:41:48,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:48,575 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 11:41:48,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-26 11:41:48,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 11:41:48,928 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 11:41:49,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-26 11:41:49,935 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 11:41:49,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 32 [2023-08-26 11:41:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:49,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:51,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:41:51,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-26 11:41:51,965 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:41:51,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2023-08-26 11:41:51,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2023-08-26 11:41:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206219375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:52,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:52,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 67 [2023-08-26 11:41:52,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005793304] [2023-08-26 11:41:52,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:52,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-26 11:41:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-26 11:41:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4284, Unknown=10, NotChecked=0, Total=4692 [2023-08-26 11:41:52,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 11:41:52,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 984 transitions, 15970 flow. Second operand has 69 states, 69 states have (on average 91.56521739130434) internal successors, (6318), 69 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states 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 11:41:52,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:52,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 11:41:52,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:05,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:42:07,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:42:16,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:42:18,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:42:20,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:42:27,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:42:33,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:42:35,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:42:43,754 INFO L124 PetriNetUnfolderBase]: 17461/32707 cut-off events. [2023-08-26 11:42:43,754 INFO L125 PetriNetUnfolderBase]: For 164029/164029 co-relation queries the response was YES. [2023-08-26 11:42:44,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162474 conditions, 32707 events. 17461/32707 cut-off events. For 164029/164029 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 247406 event pairs, 4858 based on Foata normal form. 24/32658 useless extension candidates. Maximal degree in co-relation 162355. Up to 14738 conditions per place. [2023-08-26 11:42:44,460 INFO L140 encePairwiseOnDemand]: 329/349 looper letters, 1007 selfloop transitions, 746 changer transitions 136/1889 dead transitions. [2023-08-26 11:42:44,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1889 transitions, 29631 flow [2023-08-26 11:42:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-08-26 11:42:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-08-26 11:42:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 8085 transitions. [2023-08-26 11:42:44,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27578796561604585 [2023-08-26 11:42:44,470 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 8085 transitions. [2023-08-26 11:42:44,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 8085 transitions. [2023-08-26 11:42:44,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:44,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 8085 transitions. [2023-08-26 11:42:44,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 96.25) internal successors, (8085), 84 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states 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 11:42:44,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 349.0) internal successors, (29665), 85 states have internal predecessors, (29665), 0 states have call successors, (0), 0 states 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 11:42:44,502 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 349.0) internal successors, (29665), 85 states have internal predecessors, (29665), 0 states have call successors, (0), 0 states 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 11:42:44,502 INFO L175 Difference]: Start difference. First operand has 448 places, 984 transitions, 15970 flow. Second operand 84 states and 8085 transitions. [2023-08-26 11:42:44,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1889 transitions, 29631 flow [2023-08-26 11:42:46,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1889 transitions, 28460 flow, removed 530 selfloop flow, removed 20 redundant places. [2023-08-26 11:42:46,515 INFO L231 Difference]: Finished difference. Result has 564 places, 1414 transitions, 24351 flow [2023-08-26 11:42:46,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=15247, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=24351, PETRI_PLACES=564, PETRI_TRANSITIONS=1414} [2023-08-26 11:42:46,516 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 518 predicate places. [2023-08-26 11:42:46,516 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 1414 transitions, 24351 flow [2023-08-26 11:42:46,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 91.56521739130434) internal successors, (6318), 69 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states 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 11:42:46,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:46,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:46,523 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 11:42:46,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-26 11:42:46,718 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:42:46,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:46,718 INFO L85 PathProgramCache]: Analyzing trace with hash -19589870, now seen corresponding path program 3 times [2023-08-26 11:42:46,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:46,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095948425] [2023-08-26 11:42:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:46,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:48,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:48,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095948425] [2023-08-26 11:42:48,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095948425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:42:48,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979597455] [2023-08-26 11:42:48,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 11:42:48,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:42:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:42:48,217 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:42:48,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 11:42:48,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 11:42:48,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:42:48,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-26 11:42:48,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:42:48,379 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 11:42:48,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 11:42:48,599 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 11:42:48,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 11:42:49,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2023-08-26 11:42:49,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-26 11:42:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:49,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:42:50,478 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~top~0 0) (forall ((v_ArrVal_925 (Array Int Int)) (v_ArrVal_927 Int)) (not (= (mod (let ((.cse1 (* c_~top~0 4))) (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_925))) (store .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| .cse1) v_ArrVal_927))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) .cse1))) 4294967296) 4294967294)))) is different from false [2023-08-26 11:42:51,034 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:42:51,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-26 11:42:51,042 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:42:51,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-26 11:42:51,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-26 11:42:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:42:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979597455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:42:51,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:42:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 64 [2023-08-26 11:42:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694190502] [2023-08-26 11:42:51,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:42:51,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-26 11:42:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-26 11:42:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3833, Unknown=20, NotChecked=126, Total=4290 [2023-08-26 11:42:51,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 11:42:51,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 1414 transitions, 24351 flow. Second operand has 66 states, 66 states have (on average 91.63636363636364) internal successors, (6048), 66 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 11:42:51,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:51,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 11:42:51,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:35,100 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~top~0 4))) (let ((.cse0 (<= c_~top~0 0)) (.cse3 (+ |c_~#arr~0.offset| (- 4) .cse2))) (and (or .cse0 (forall ((v_ArrVal_925 (Array Int Int)) (v_ArrVal_927 Int)) (not (= 4294967294 (mod (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_925))) (store .cse1 |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select .cse1 |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_#in~stack#1.offset| .cse2) v_ArrVal_927))) |c_~#arr~0.base|) .cse3) 4294967296))))) (or .cse0 (forall ((v_ArrVal_925 (Array Int Int)) (v_ArrVal_927 Int)) (not (= (mod (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_925))) (store .cse4 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse4 |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| .cse2) v_ArrVal_927))) |c_~#arr~0.base|) .cse3) 4294967296) 4294967294))))))) is different from false [2023-08-26 11:43:43,966 WARN L234 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:43:57,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:44:00,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:44:24,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:44:49,440 INFO L124 PetriNetUnfolderBase]: 20504/38815 cut-off events. [2023-08-26 11:44:49,441 INFO L125 PetriNetUnfolderBase]: For 248528/248528 co-relation queries the response was YES. [2023-08-26 11:44:50,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199116 conditions, 38815 events. 20504/38815 cut-off events. For 248528/248528 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 300585 event pairs, 3948 based on Foata normal form. 688/39356 useless extension candidates. Maximal degree in co-relation 198949. Up to 13474 conditions per place. [2023-08-26 11:44:50,857 INFO L140 encePairwiseOnDemand]: 325/349 looper letters, 1122 selfloop transitions, 1397 changer transitions 106/2625 dead transitions. [2023-08-26 11:44:50,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 2625 transitions, 39981 flow [2023-08-26 11:44:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-08-26 11:44:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2023-08-26 11:44:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 17296 transitions. [2023-08-26 11:44:50,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2738051892542228 [2023-08-26 11:44:50,871 INFO L72 ComplementDD]: Start complementDD. Operand 181 states and 17296 transitions. [2023-08-26 11:44:50,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 181 states and 17296 transitions. [2023-08-26 11:44:50,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:44:50,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 181 states and 17296 transitions. [2023-08-26 11:44:50,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 182 states, 181 states have (on average 95.55801104972376) internal successors, (17296), 181 states have internal predecessors, (17296), 0 states have call successors, (0), 0 states 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 11:44:50,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 182 states, 182 states have (on average 349.0) internal successors, (63518), 182 states have internal predecessors, (63518), 0 states have call successors, (0), 0 states 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 11:44:50,942 INFO L81 ComplementDD]: Finished complementDD. Result has 182 states, 182 states have (on average 349.0) internal successors, (63518), 182 states have internal predecessors, (63518), 0 states have call successors, (0), 0 states 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 11:44:50,943 INFO L175 Difference]: Start difference. First operand has 564 places, 1414 transitions, 24351 flow. Second operand 181 states and 17296 transitions. [2023-08-26 11:44:50,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 2625 transitions, 39981 flow [2023-08-26 11:44:54,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 704 places, 2625 transitions, 39640 flow, removed 115 selfloop flow, removed 11 redundant places. [2023-08-26 11:44:54,114 INFO L231 Difference]: Finished difference. Result has 770 places, 1965 transitions, 36974 flow [2023-08-26 11:44:54,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=19332, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=772, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=181, PETRI_FLOW=36974, PETRI_PLACES=770, PETRI_TRANSITIONS=1965} [2023-08-26 11:44:54,115 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 724 predicate places. [2023-08-26 11:44:54,115 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 1965 transitions, 36974 flow [2023-08-26 11:44:54,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 91.63636363636364) internal successors, (6048), 66 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 11:44:54,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:44:54,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:44:54,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 11:44:54,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 11:44:54,317 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:44:54,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:44:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash 277423492, now seen corresponding path program 4 times [2023-08-26 11:44:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:44:54,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919998129] [2023-08-26 11:44:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:44:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:44:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:44:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:44:56,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:44:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919998129] [2023-08-26 11:44:56,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919998129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:44:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101518533] [2023-08-26 11:44:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 11:44:56,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:44:56,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:44:56,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:44:56,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 11:44:56,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 11:44:56,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:44:56,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-26 11:44:56,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:44:56,311 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 11:44:56,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 11:44:56,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 11:44:56,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 11:44:56,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-26 11:44:56,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 11:44:57,505 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-26 11:44:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:44:57,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:44:59,423 INFO L322 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-26 11:44:59,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2023-08-26 11:44:59,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 11:44:59,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2023-08-26 11:44:59,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-26 11:45:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:01,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101518533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:45:01,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:45:01,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 69 [2023-08-26 11:45:01,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168688919] [2023-08-26 11:45:01,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:45:01,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-08-26 11:45:01,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-08-26 11:45:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=4597, Unknown=28, NotChecked=0, Total=4970 [2023-08-26 11:45:01,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 11:45:01,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 770 places, 1965 transitions, 36974 flow. Second operand has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states 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 11:45:01,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:01,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 11:45:01,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:22,291 WARN L234 SmtUtils]: Spent 20.39s on a formula simplification. DAG size of input: 95 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:46:04,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:46:06,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:46:21,406 WARN L234 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 98 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:46:47,876 WARN L234 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 105 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:47:08,581 WARN L234 SmtUtils]: Spent 9.95s on a formula simplification. DAG size of input: 126 DAG size of output: 123 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:47:18,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:47:20,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:47:22,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:47:31,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:47:33,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:47:35,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:47:37,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:48:05,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:48:15,458 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base|)) (.cse0 (= c_~top~0 0)) (.cse2 (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4)))) (and (or .cse0 (forall ((v_ArrVal_995 Int) (v_ArrVal_997 (Array Int Int))) (not (= (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse1 (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| (* |c_t1Thread1of1ForFork1_get_top_#res#1| 4)) v_ArrVal_995)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_997) |c_~#arr~0.base|) .cse2) 4294967296) 4294967294)))) (or (= |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 0) (forall ((v_ArrVal_997 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_997) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| (- 4))) 4294967296))))) (or .cse0 (forall ((v_ArrVal_995 Int) (v_ArrVal_997 (Array Int Int)) (|v_t1Thread1of1ForFork1_get_top_#res#1_58| Int)) (or (not (= (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse1 (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| (* |v_t1Thread1of1ForFork1_get_top_#res#1_58| 4)) v_ArrVal_995)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_997) |c_~#arr~0.base|) .cse2) 4294967296) 4294967294)) (< |v_t1Thread1of1ForFork1_get_top_#res#1_58| c_~top~0)))) (or .cse0 (forall ((v_ArrVal_995 Int) (v_ArrVal_997 (Array Int Int)) (|v_t1Thread1of1ForFork1_push_~stack#1.offset_97| Int) (|v_t1Thread1of1ForFork1_get_top_#res#1_58| Int)) (or (< |v_t1Thread1of1ForFork1_push_~stack#1.offset_97| |c_t1Thread1of1ForFork1_push_#in~stack#1.offset|) (< |v_t1Thread1of1ForFork1_get_top_#res#1_58| c_~top~0) (not (= (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ (* |v_t1Thread1of1ForFork1_get_top_#res#1_58| 4) |v_t1Thread1of1ForFork1_push_~stack#1.offset_97|) v_ArrVal_995)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_997) |c_~#arr~0.base|) .cse2) 4294967296) 4294967294))))))) is different from false [2023-08-26 11:48:19,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:48:21,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:48:46,752 WARN L234 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 104 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:50:05,494 WARN L234 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 117 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:50:19,993 WARN L234 SmtUtils]: Spent 9.39s on a formula simplification. DAG size of input: 116 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:50:31,982 WARN L234 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 89 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:50:34,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:50:49,994 WARN L234 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 66 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 11:51:50,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 11:52:14,256 INFO L124 PetriNetUnfolderBase]: 31502/59362 cut-off events. [2023-08-26 11:52:14,256 INFO L125 PetriNetUnfolderBase]: For 806173/806173 co-relation queries the response was YES. [2023-08-26 11:52:18,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428816 conditions, 59362 events. 31502/59362 cut-off events. For 806173/806173 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 496906 event pairs, 5335 based on Foata normal form. 218/59258 useless extension candidates. Maximal degree in co-relation 428592. Up to 20922 conditions per place. [2023-08-26 11:52:18,256 INFO L140 encePairwiseOnDemand]: 325/349 looper letters, 1533 selfloop transitions, 2374 changer transitions 96/4003 dead transitions. [2023-08-26 11:52:18,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 942 places, 4003 transitions, 74469 flow [2023-08-26 11:52:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2023-08-26 11:52:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2023-08-26 11:52:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 16762 transitions. [2023-08-26 11:52:18,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2744494474007368 [2023-08-26 11:52:18,274 INFO L72 ComplementDD]: Start complementDD. Operand 175 states and 16762 transitions. [2023-08-26 11:52:18,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 16762 transitions. [2023-08-26 11:52:18,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:18,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 175 states and 16762 transitions. [2023-08-26 11:52:18,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 176 states, 175 states have (on average 95.78285714285714) internal successors, (16762), 175 states have internal predecessors, (16762), 0 states have call successors, (0), 0 states 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 11:52:18,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 176 states, 176 states have (on average 349.0) internal successors, (61424), 176 states have internal predecessors, (61424), 0 states have call successors, (0), 0 states 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 11:52:18,346 INFO L81 ComplementDD]: Finished complementDD. Result has 176 states, 176 states have (on average 349.0) internal successors, (61424), 176 states have internal predecessors, (61424), 0 states have call successors, (0), 0 states 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 11:52:18,346 INFO L175 Difference]: Start difference. First operand has 770 places, 1965 transitions, 36974 flow. Second operand 175 states and 16762 transitions. [2023-08-26 11:52:18,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 942 places, 4003 transitions, 74469 flow [2023-08-26 11:52:31,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 917 places, 4003 transitions, 70970 flow, removed 1437 selfloop flow, removed 25 redundant places. [2023-08-26 11:52:31,468 INFO L231 Difference]: Finished difference. Result has 969 places, 3134 transitions, 62979 flow [2023-08-26 11:52:31,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=33825, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=175, PETRI_FLOW=62979, PETRI_PLACES=969, PETRI_TRANSITIONS=3134} [2023-08-26 11:52:31,470 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 923 predicate places. [2023-08-26 11:52:31,470 INFO L495 AbstractCegarLoop]: Abstraction has has 969 places, 3134 transitions, 62979 flow [2023-08-26 11:52:31,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states 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 11:52:31,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:31,471 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-08-26 11:52:31,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 11:52:31,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 11:52:31,672 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 11:52:31,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash -80465826, now seen corresponding path program 2 times [2023-08-26 11:52:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900072773] [2023-08-26 11:52:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:52:31,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:31,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900072773] [2023-08-26 11:52:31,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900072773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:52:31,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018784931] [2023-08-26 11:52:31,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 11:52:31,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:52:31,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:52:31,921 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:52:31,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 11:52:32,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:52:32,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:52:32,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 11:52:32,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:52:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:52:32,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:52:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:52:32,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018784931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:52:32,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:52:32,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2023-08-26 11:52:32,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866939238] [2023-08-26 11:52:32,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:52:32,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 11:52:32,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 11:52:32,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2023-08-26 11:52:32,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 349 [2023-08-26 11:52:32,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 3134 transitions, 62979 flow. Second operand has 26 states, 26 states have (on average 146.46153846153845) internal successors, (3808), 26 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states 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 11:52:32,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:32,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 349 [2023-08-26 11:52:32,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 11:53:29,447 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 11:53:29,447 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 11:53:30,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-26 11:53:30,569 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 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown