/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:41:02,153 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:41:02,201 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 11:41:02,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:41:02,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:41:02,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:41:02,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:41:02,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:41:02,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:41:02,220 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:41:02,220 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:41:02,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:41:02,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:41:02,221 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:41:02,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:41:02,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:41:02,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:41:02,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:41:02,222 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:41:02,222 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:41:02,222 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:41:02,227 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:41:02,227 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:41:02,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:41:02,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:41:02,229 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:41:02,229 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:41:02,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:41:02,229 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:41:02,229 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:41:02,230 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:41:02,230 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:41:02,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:41:02,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:41:02,231 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:41:02,231 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:41:02,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:41:02,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:41:02,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:41:02,493 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:41:02,493 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:41:02,495 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2023-08-26 11:41:03,397 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:41:03,615 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:41:03,615 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2023-08-26 11:41:03,630 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4d5cba24/3daed404fd7549b590244bb49a1f79e6/FLAGc1eb50820 [2023-08-26 11:41:03,639 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4d5cba24/3daed404fd7549b590244bb49a1f79e6 [2023-08-26 11:41:03,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:41:03,643 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:41:03,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:41:03,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:41:03,646 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:41:03,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:03,647 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3676fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03, skipping insertion in model container [2023-08-26 11:41:03,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:03,673 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:41:03,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:41:03,926 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:41:03,943 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 11:41:03,944 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 11:41:03,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:41:03,981 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:03,981 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:03,985 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:41:03,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03 WrapperNode [2023-08-26 11:41:03,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:41:03,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:41:03,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:41:03,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:41:03,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,029 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-08-26 11:41:04,030 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:41:04,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:41:04,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:41:04,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:41:04,036 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,055 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,059 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,060 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:41:04,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:41:04,061 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:41:04,061 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:41:04,061 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (1/1) ... [2023-08-26 11:41:04,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:41:04,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:04,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 11:41:04,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 11:41:04,115 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 11:41:04,116 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 11:41:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 11:41:04,116 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 11:41:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:41:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 11:41:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:41:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:41:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:41:04,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:41:04,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 11:41:04,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:41:04,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:41:04,118 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 11:41:04,217 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:41:04,220 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:41:04,347 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:41:04,351 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:41:04,351 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:41:04,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:41:04 BoogieIcfgContainer [2023-08-26 11:41:04,353 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:41:04,354 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:41:04,355 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:41:04,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:41:04,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:41:03" (1/3) ... [2023-08-26 11:41:04,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b07817e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:41:04, skipping insertion in model container [2023-08-26 11:41:04,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:03" (2/3) ... [2023-08-26 11:41:04,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b07817e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:41:04, skipping insertion in model container [2023-08-26 11:41:04,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:41:04" (3/3) ... [2023-08-26 11:41:04,358 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2023-08-26 11:41:04,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:41:04,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 11:41:04,373 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:41:04,434 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:41:04,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 11:41:04,498 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 11:41:04,498 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:04,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 11:41:04,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 11:41:04,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:04,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:41:04,518 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:04,521 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:04,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:04,552 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 11:41:04,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:04,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 11:41:04,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 1440 [2023-08-26 11:41:06,257 INFO L134 LiptonReduction]: Checked pairs total: 1354 [2023-08-26 11:41:06,257 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-26 11:41:06,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:41:06,271 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;@5a7c976d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:41:06,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 11:41:06,271 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:41:06,272 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:41:06,272 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:06,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:06,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:41:06,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:06,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash 313, now seen corresponding path program 1 times [2023-08-26 11:41:06,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:06,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121160587] [2023-08-26 11:41:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:06,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:06,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:06,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121160587] [2023-08-26 11:41:06,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121160587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:06,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:06,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:41:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981627984] [2023-08-26 11:41:06,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:06,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:41:06,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:41:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:41:06,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 157 [2023-08-26 11:41:06,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:06,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 157 [2023-08-26 11:41:06,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:06,420 INFO L124 PetriNetUnfolderBase]: 76/125 cut-off events. [2023-08-26 11:41:06,420 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:41:06,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 125 events. 76/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 298 event pairs, 48 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 252. Up to 126 conditions per place. [2023-08-26 11:41:06,422 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 14 selfloop transitions, 0 changer transitions 1/15 dead transitions. [2023-08-26 11:41:06,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 11:41:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:41:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:41:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-26 11:41:06,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-08-26 11:41:06,433 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-26 11:41:06,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-26 11:41:06,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:06,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-26 11:41:06,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,443 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,444 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 42 flow. Second operand 2 states and 156 transitions. [2023-08-26 11:41:06,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 11:41:06,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:41:06,447 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 32 flow [2023-08-26 11:41:06,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-08-26 11:41:06,451 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:06,451 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 32 flow [2023-08-26 11:41:06,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:06,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:41:06,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:41:06,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:06,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash 306362, now seen corresponding path program 1 times [2023-08-26 11:41:06,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:06,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951549858] [2023-08-26 11:41:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:06,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:06,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:06,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951549858] [2023-08-26 11:41:06,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951549858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:06,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:06,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:41:06,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355800623] [2023-08-26 11:41:06,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:06,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:41:06,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:41:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:41:06,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 157 [2023-08-26 11:41:06,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:06,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 157 [2023-08-26 11:41:06,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:06,669 INFO L124 PetriNetUnfolderBase]: 55/92 cut-off events. [2023-08-26 11:41:06,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:06,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 92 events. 55/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 34 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 192. Up to 92 conditions per place. [2023-08-26 11:41:06,670 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 11:41:06,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 56 flow [2023-08-26 11:41:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:41:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:41:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 11:41:06,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39278131634819535 [2023-08-26 11:41:06,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 11:41:06,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 11:41:06,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:06,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 11:41:06,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,674 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 32 flow. Second operand 3 states and 185 transitions. [2023-08-26 11:41:06,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 56 flow [2023-08-26 11:41:06,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 13 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:06,675 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 32 flow [2023-08-26 11:41:06,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=13} [2023-08-26 11:41:06,676 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:06,676 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 32 flow [2023-08-26 11:41:06,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:06,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:41:06,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:41:06,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:06,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:06,677 INFO L85 PathProgramCache]: Analyzing trace with hash 306361, now seen corresponding path program 1 times [2023-08-26 11:41:06,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:06,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761560360] [2023-08-26 11:41:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:06,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:06,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:06,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761560360] [2023-08-26 11:41:06,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761560360] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:06,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:06,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:41:06,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303570374] [2023-08-26 11:41:06,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:06,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:41:06,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:06,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:41:06,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:41:06,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 157 [2023-08-26 11:41:06,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:06,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 157 [2023-08-26 11:41:06,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:06,746 INFO L124 PetriNetUnfolderBase]: 52/86 cut-off events. [2023-08-26 11:41:06,746 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:06,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 86 events. 52/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 32 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 181. Up to 86 conditions per place. [2023-08-26 11:41:06,747 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 11:41:06,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 54 flow [2023-08-26 11:41:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:41:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:41:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-08-26 11:41:06,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791932059447986 [2023-08-26 11:41:06,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-08-26 11:41:06,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-08-26 11:41:06,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:06,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-08-26 11:41:06,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,750 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 3 states and 178 transitions. [2023-08-26 11:41:06,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 54 flow [2023-08-26 11:41:06,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 12 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:41:06,751 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 31 flow [2023-08-26 11:41:06,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-08-26 11:41:06,751 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:06,752 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 31 flow [2023-08-26 11:41:06,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:06,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:41:06,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:41:06,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:06,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash 537039974, now seen corresponding path program 1 times [2023-08-26 11:41:06,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:06,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712161537] [2023-08-26 11:41:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:06,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712161537] [2023-08-26 11:41:06,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712161537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:06,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:06,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:41:06,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266689113] [2023-08-26 11:41:06,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:06,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:41:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:41:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:41:06,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:06,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:06,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:06,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:06,896 INFO L124 PetriNetUnfolderBase]: 64/107 cut-off events. [2023-08-26 11:41:06,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:06,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 107 events. 64/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 11 based on Foata normal form. 9/87 useless extension candidates. Maximal degree in co-relation 224. Up to 55 conditions per place. [2023-08-26 11:41:06,897 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 18 selfloop transitions, 4 changer transitions 2/24 dead transitions. [2023-08-26 11:41:06,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 103 flow [2023-08-26 11:41:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:41:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:41:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-08-26 11:41:06,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42197452229299365 [2023-08-26 11:41:06,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-08-26 11:41:06,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-08-26 11:41:06,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:06,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-08-26 11:41:06,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,901 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,901 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 31 flow. Second operand 4 states and 265 transitions. [2023-08-26 11:41:06,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 103 flow [2023-08-26 11:41:06,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:41:06,902 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 55 flow [2023-08-26 11:41:06,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-26 11:41:06,902 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-26 11:41:06,902 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 55 flow [2023-08-26 11:41:06,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:06,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:06,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:41:06,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:06,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:06,903 INFO L85 PathProgramCache]: Analyzing trace with hash 698883682, now seen corresponding path program 1 times [2023-08-26 11:41:06,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:06,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394651293] [2023-08-26 11:41:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:06,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:06,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:06,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394651293] [2023-08-26 11:41:06,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394651293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:06,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:06,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:41:06,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766158460] [2023-08-26 11:41:06,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:06,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:41:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:41:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:41:06,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:06,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:06,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:06,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:06,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:07,045 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-26 11:41:07,048 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 11:41:07,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 667 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 544. Up to 89 conditions per place. [2023-08-26 11:41:07,049 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-26 11:41:07,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 217 flow [2023-08-26 11:41:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:41:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:41:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 398 transitions. [2023-08-26 11:41:07,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42250530785562634 [2023-08-26 11:41:07,050 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 398 transitions. [2023-08-26 11:41:07,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 398 transitions. [2023-08-26 11:41:07,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:07,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 398 transitions. [2023-08-26 11:41:07,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,053 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 55 flow. Second operand 6 states and 398 transitions. [2023-08-26 11:41:07,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 217 flow [2023-08-26 11:41:07,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 217 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:07,054 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 136 flow [2023-08-26 11:41:07,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 11:41:07,055 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2023-08-26 11:41:07,055 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 136 flow [2023-08-26 11:41:07,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:07,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:07,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:41:07,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:07,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash 698901352, now seen corresponding path program 2 times [2023-08-26 11:41:07,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:07,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919085009] [2023-08-26 11:41:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:07,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:07,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:07,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919085009] [2023-08-26 11:41:07,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919085009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:07,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:07,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:41:07,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093374143] [2023-08-26 11:41:07,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:07,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:41:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:41:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:41:07,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:07,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:07,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:07,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:07,176 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-08-26 11:41:07,176 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-26 11:41:07,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 625 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 646. Up to 84 conditions per place. [2023-08-26 11:41:07,180 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-26 11:41:07,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 286 flow [2023-08-26 11:41:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:41:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:41:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2023-08-26 11:41:07,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42420382165605097 [2023-08-26 11:41:07,182 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 333 transitions. [2023-08-26 11:41:07,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 333 transitions. [2023-08-26 11:41:07,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:07,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 333 transitions. [2023-08-26 11:41:07,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,184 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,184 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 136 flow. Second operand 5 states and 333 transitions. [2023-08-26 11:41:07,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 286 flow [2023-08-26 11:41:07,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 284 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:07,189 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 184 flow [2023-08-26 11:41:07,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-26 11:41:07,190 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 16 predicate places. [2023-08-26 11:41:07,192 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 184 flow [2023-08-26 11:41:07,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:07,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:07,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:41:07,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:07,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:07,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1937873995, now seen corresponding path program 1 times [2023-08-26 11:41:07,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:07,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910892771] [2023-08-26 11:41:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:07,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:07,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:07,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910892771] [2023-08-26 11:41:07,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910892771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:07,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:07,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:07,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267366527] [2023-08-26 11:41:07,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:07,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:07,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:07,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:07,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:07,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:07,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:07,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:07,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:07,407 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-26 11:41:07,407 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2023-08-26 11:41:07,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 219 events. 126/219 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 705 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 783. Up to 86 conditions per place. [2023-08-26 11:41:07,408 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-08-26 11:41:07,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 427 flow [2023-08-26 11:41:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:41:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:41:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 592 transitions. [2023-08-26 11:41:07,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418966737438075 [2023-08-26 11:41:07,410 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 592 transitions. [2023-08-26 11:41:07,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 592 transitions. [2023-08-26 11:41:07,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:07,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 592 transitions. [2023-08-26 11:41:07,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.77777777777777) internal successors, (592), 9 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,413 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,413 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 184 flow. Second operand 9 states and 592 transitions. [2023-08-26 11:41:07,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 427 flow [2023-08-26 11:41:07,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 390 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 11:41:07,420 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 253 flow [2023-08-26 11:41:07,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-26 11:41:07,420 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-08-26 11:41:07,420 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 253 flow [2023-08-26 11:41:07,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:07,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:07,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:41:07,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:07,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:07,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1938173455, now seen corresponding path program 2 times [2023-08-26 11:41:07,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:07,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532332294] [2023-08-26 11:41:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:07,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:07,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532332294] [2023-08-26 11:41:07,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532332294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:07,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:07,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:07,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912585001] [2023-08-26 11:41:07,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:07,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:07,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:07,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:07,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:07,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:07,572 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-26 11:41:07,573 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-08-26 11:41:07,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 283 events. 162/283 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 948 event pairs, 22 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1077. Up to 77 conditions per place. [2023-08-26 11:41:07,574 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-08-26 11:41:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 499 flow [2023-08-26 11:41:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:41:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:41:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 526 transitions. [2023-08-26 11:41:07,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41878980891719747 [2023-08-26 11:41:07,576 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 526 transitions. [2023-08-26 11:41:07,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 526 transitions. [2023-08-26 11:41:07,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:07,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 526 transitions. [2023-08-26 11:41:07,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.75) internal successors, (526), 8 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,578 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,578 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 253 flow. Second operand 8 states and 526 transitions. [2023-08-26 11:41:07,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 499 flow [2023-08-26 11:41:07,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 469 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-26 11:41:07,581 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 346 flow [2023-08-26 11:41:07,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-26 11:41:07,582 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2023-08-26 11:41:07,582 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 346 flow [2023-08-26 11:41:07,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:07,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:07,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:41:07,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:07,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1978408975, now seen corresponding path program 3 times [2023-08-26 11:41:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:07,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020126706] [2023-08-26 11:41:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:07,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:07,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:07,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020126706] [2023-08-26 11:41:07,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020126706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:07,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:07,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:07,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269078479] [2023-08-26 11:41:07,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:07,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:07,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:07,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:07,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:07,732 INFO L124 PetriNetUnfolderBase]: 150/263 cut-off events. [2023-08-26 11:41:07,732 INFO L125 PetriNetUnfolderBase]: For 1223/1223 co-relation queries the response was YES. [2023-08-26 11:41:07,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 263 events. 150/263 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 893 event pairs, 22 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1174. Up to 65 conditions per place. [2023-08-26 11:41:07,734 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 30 selfloop transitions, 20 changer transitions 8/58 dead transitions. [2023-08-26 11:41:07,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 568 flow [2023-08-26 11:41:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:41:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:41:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 460 transitions. [2023-08-26 11:41:07,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41856232939035487 [2023-08-26 11:41:07,735 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 460 transitions. [2023-08-26 11:41:07,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 460 transitions. [2023-08-26 11:41:07,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:07,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 460 transitions. [2023-08-26 11:41:07,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 11:41:07,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 11:41:07,738 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states 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 11:41:07,738 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 346 flow. Second operand 7 states and 460 transitions. [2023-08-26 11:41:07,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 568 flow [2023-08-26 11:41:07,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 533 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 11:41:07,744 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 390 flow [2023-08-26 11:41:07,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2023-08-26 11:41:07,744 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-08-26 11:41:07,745 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 390 flow [2023-08-26 11:41:07,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:07,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:07,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:07,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:41:07,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:07,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:07,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1201164613, now seen corresponding path program 4 times [2023-08-26 11:41:07,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:07,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173682271] [2023-08-26 11:41:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:07,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:07,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:07,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173682271] [2023-08-26 11:41:07,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173682271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:07,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868637427] [2023-08-26 11:41:07,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 11:41:07,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:07,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:07,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:41:07,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 11:41:07,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 11:41:07,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:07,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 11:41:07,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:07,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868637427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:08,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:08,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 11:41:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969165589] [2023-08-26 11:41:08,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:08,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 11:41:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 11:41:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-26 11:41:08,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:08,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 390 flow. Second operand has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:08,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:08,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:08,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:08,223 INFO L124 PetriNetUnfolderBase]: 198/343 cut-off events. [2023-08-26 11:41:08,223 INFO L125 PetriNetUnfolderBase]: For 2136/2136 co-relation queries the response was YES. [2023-08-26 11:41:08,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 343 events. 198/343 cut-off events. For 2136/2136 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1152 event pairs, 18 based on Foata normal form. 16/359 useless extension candidates. Maximal degree in co-relation 1639. Up to 87 conditions per place. [2023-08-26 11:41:08,225 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 34 selfloop transitions, 35 changer transitions 22/91 dead transitions. [2023-08-26 11:41:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 948 flow [2023-08-26 11:41:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:41:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:41:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 914 transitions. [2023-08-26 11:41:08,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41583257506824384 [2023-08-26 11:41:08,228 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 914 transitions. [2023-08-26 11:41:08,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 914 transitions. [2023-08-26 11:41:08,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:08,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 914 transitions. [2023-08-26 11:41:08,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.28571428571429) internal successors, (914), 14 states have internal predecessors, (914), 0 states have call successors, (0), 0 states 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 11:41:08,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states 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 11:41:08,232 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states 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 11:41:08,232 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 390 flow. Second operand 14 states and 914 transitions. [2023-08-26 11:41:08,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 948 flow [2023-08-26 11:41:08,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 886 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-26 11:41:08,237 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 691 flow [2023-08-26 11:41:08,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=691, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-26 11:41:08,238 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-08-26 11:41:08,238 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 691 flow [2023-08-26 11:41:08,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:08,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:08,238 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:08,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 11:41:08,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 11:41:08,445 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:08,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1651254496, now seen corresponding path program 5 times [2023-08-26 11:41:08,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:08,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534037559] [2023-08-26 11:41:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:08,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534037559] [2023-08-26 11:41:08,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534037559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:08,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906381926] [2023-08-26 11:41:08,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 11:41:08,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:08,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:41:08,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 11:41:08,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 11:41:08,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:08,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 11:41:08,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:08,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:08,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906381926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:08,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:08,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-26 11:41:08,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140512308] [2023-08-26 11:41:08,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:08,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:41:08,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:08,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:41:08,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:41:08,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:08,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 691 flow. Second operand has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 11:41:08,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:08,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:08,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:08,953 INFO L124 PetriNetUnfolderBase]: 254/455 cut-off events. [2023-08-26 11:41:08,953 INFO L125 PetriNetUnfolderBase]: For 4621/4621 co-relation queries the response was YES. [2023-08-26 11:41:08,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 455 events. 254/455 cut-off events. For 4621/4621 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1589 event pairs, 55 based on Foata normal form. 32/487 useless extension candidates. Maximal degree in co-relation 2411. Up to 249 conditions per place. [2023-08-26 11:41:08,956 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 65 selfloop transitions, 25 changer transitions 27/117 dead transitions. [2023-08-26 11:41:08,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1457 flow [2023-08-26 11:41:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 11:41:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 11:41:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1043 transitions. [2023-08-26 11:41:08,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41520700636942676 [2023-08-26 11:41:08,959 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1043 transitions. [2023-08-26 11:41:08,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1043 transitions. [2023-08-26 11:41:08,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:08,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1043 transitions. [2023-08-26 11:41:08,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.1875) internal successors, (1043), 16 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states 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 11:41:08,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states 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 11:41:08,964 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states 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 11:41:08,964 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 691 flow. Second operand 16 states and 1043 transitions. [2023-08-26 11:41:08,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1457 flow [2023-08-26 11:41:08,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 1096 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-08-26 11:41:08,976 INFO L231 Difference]: Finished difference. Result has 92 places, 69 transitions, 764 flow [2023-08-26 11:41:08,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=764, PETRI_PLACES=92, PETRI_TRANSITIONS=69} [2023-08-26 11:41:08,976 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-08-26 11:41:08,976 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 69 transitions, 764 flow [2023-08-26 11:41:08,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 11:41:08,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:08,977 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:08,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:09,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 11:41:09,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:09,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1714670042, now seen corresponding path program 6 times [2023-08-26 11:41:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:09,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869186924] [2023-08-26 11:41:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:09,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:09,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:09,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869186924] [2023-08-26 11:41:09,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869186924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:09,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236545919] [2023-08-26 11:41:09,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 11:41:09,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:09,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:09,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:41:09,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 11:41:09,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 11:41:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:09,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 11:41:09,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:09,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:09,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236545919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:09,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:09,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 11:41:09,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205994398] [2023-08-26 11:41:09,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:09,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 11:41:09,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 11:41:09,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-26 11:41:09,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:09,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 69 transitions, 764 flow. Second operand has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states 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 11:41:09,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:09,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:09,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:09,858 INFO L124 PetriNetUnfolderBase]: 408/747 cut-off events. [2023-08-26 11:41:09,858 INFO L125 PetriNetUnfolderBase]: For 12685/12685 co-relation queries the response was YES. [2023-08-26 11:41:09,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 747 events. 408/747 cut-off events. For 12685/12685 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3284 event pairs, 44 based on Foata normal form. 32/779 useless extension candidates. Maximal degree in co-relation 3998. Up to 227 conditions per place. [2023-08-26 11:41:09,862 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 73 selfloop transitions, 71 changer transitions 37/181 dead transitions. [2023-08-26 11:41:09,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 2080 flow [2023-08-26 11:41:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 11:41:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 11:41:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1434 transitions. [2023-08-26 11:41:09,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151708164447018 [2023-08-26 11:41:09,865 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1434 transitions. [2023-08-26 11:41:09,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1434 transitions. [2023-08-26 11:41:09,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:09,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1434 transitions. [2023-08-26 11:41:09,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.18181818181819) internal successors, (1434), 22 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states 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 11:41:09,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:09,872 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:09,872 INFO L175 Difference]: Start difference. First operand has 92 places, 69 transitions, 764 flow. Second operand 22 states and 1434 transitions. [2023-08-26 11:41:09,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 2080 flow [2023-08-26 11:41:09,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 181 transitions, 1988 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-08-26 11:41:09,893 INFO L231 Difference]: Finished difference. Result has 123 places, 107 transitions, 1491 flow [2023-08-26 11:41:09,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1491, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2023-08-26 11:41:09,894 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 101 predicate places. [2023-08-26 11:41:09,894 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 1491 flow [2023-08-26 11:41:09,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states 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 11:41:09,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:09,894 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:09,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:10,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:10,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:10,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:10,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2039594720, now seen corresponding path program 7 times [2023-08-26 11:41:10,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:10,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261140531] [2023-08-26 11:41:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:10,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:10,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261140531] [2023-08-26 11:41:10,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261140531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070986655] [2023-08-26 11:41:10,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 11:41:10,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:10,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:41:10,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 11:41:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:10,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 11:41:10,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:10,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:10,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070986655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:10,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:10,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 11:41:10,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112713446] [2023-08-26 11:41:10,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:10,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 11:41:10,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:10,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 11:41:10,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-08-26 11:41:10,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:10,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 1491 flow. Second operand has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 11:41:10,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:10,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:10,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:10,896 INFO L124 PetriNetUnfolderBase]: 572/1027 cut-off events. [2023-08-26 11:41:10,896 INFO L125 PetriNetUnfolderBase]: For 34544/34544 co-relation queries the response was YES. [2023-08-26 11:41:10,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7293 conditions, 1027 events. 572/1027 cut-off events. For 34544/34544 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4775 event pairs, 20 based on Foata normal form. 32/1059 useless extension candidates. Maximal degree in co-relation 7242. Up to 327 conditions per place. [2023-08-26 11:41:10,905 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 61 selfloop transitions, 127 changer transitions 48/236 dead transitions. [2023-08-26 11:41:10,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 236 transitions, 3639 flow [2023-08-26 11:41:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 11:41:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 11:41:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1760 transitions. [2023-08-26 11:41:10,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151922623260203 [2023-08-26 11:41:10,909 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1760 transitions. [2023-08-26 11:41:10,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1760 transitions. [2023-08-26 11:41:10,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:10,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1760 transitions. [2023-08-26 11:41:10,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.18518518518519) internal successors, (1760), 27 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 11:41:10,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states 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 11:41:10,917 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states 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 11:41:10,917 INFO L175 Difference]: Start difference. First operand has 123 places, 107 transitions, 1491 flow. Second operand 27 states and 1760 transitions. [2023-08-26 11:41:10,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 236 transitions, 3639 flow [2023-08-26 11:41:10,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 236 transitions, 3315 flow, removed 148 selfloop flow, removed 7 redundant places. [2023-08-26 11:41:10,994 INFO L231 Difference]: Finished difference. Result has 157 places, 149 transitions, 2482 flow [2023-08-26 11:41:10,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2482, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2023-08-26 11:41:10,996 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2023-08-26 11:41:10,996 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 2482 flow [2023-08-26 11:41:10,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 11:41:10,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:10,996 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:11,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:11,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:11,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash 531927744, now seen corresponding path program 8 times [2023-08-26 11:41:11,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:11,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308626772] [2023-08-26 11:41:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:11,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:11,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308626772] [2023-08-26 11:41:11,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308626772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:11,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220990775] [2023-08-26 11:41:11,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 11:41:11,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:11,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:11,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:41:11,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 11:41:11,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:41:11,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:11,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 11:41:11,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:11,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:11,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220990775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:11,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-26 11:41:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933534385] [2023-08-26 11:41:11,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:11,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 11:41:11,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 11:41:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-08-26 11:41:11,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:11,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 2482 flow. Second operand has 24 states, 24 states have (on average 61.458333333333336) internal successors, (1475), 24 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states 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 11:41:11,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:11,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:11,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:12,014 INFO L124 PetriNetUnfolderBase]: 672/1203 cut-off events. [2023-08-26 11:41:12,015 INFO L125 PetriNetUnfolderBase]: For 57710/57710 co-relation queries the response was YES. [2023-08-26 11:41:12,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10620 conditions, 1203 events. 672/1203 cut-off events. For 57710/57710 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5662 event pairs, 27 based on Foata normal form. 12/1215 useless extension candidates. Maximal degree in co-relation 10554. Up to 390 conditions per place. [2023-08-26 11:41:12,026 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 72 selfloop transitions, 139 changer transitions 40/251 dead transitions. [2023-08-26 11:41:12,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 251 transitions, 4832 flow [2023-08-26 11:41:12,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 11:41:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 11:41:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1626 transitions. [2023-08-26 11:41:12,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41426751592356686 [2023-08-26 11:41:12,029 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1626 transitions. [2023-08-26 11:41:12,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1626 transitions. [2023-08-26 11:41:12,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:12,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1626 transitions. [2023-08-26 11:41:12,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 65.04) internal successors, (1626), 25 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states 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 11:41:12,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states 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 11:41:12,037 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states 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 11:41:12,037 INFO L175 Difference]: Start difference. First operand has 157 places, 149 transitions, 2482 flow. Second operand 25 states and 1626 transitions. [2023-08-26 11:41:12,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 251 transitions, 4832 flow [2023-08-26 11:41:12,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 251 transitions, 3702 flow, removed 542 selfloop flow, removed 10 redundant places. [2023-08-26 11:41:12,153 INFO L231 Difference]: Finished difference. Result has 179 places, 179 transitions, 2846 flow [2023-08-26 11:41:12,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2846, PETRI_PLACES=179, PETRI_TRANSITIONS=179} [2023-08-26 11:41:12,154 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2023-08-26 11:41:12,154 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 179 transitions, 2846 flow [2023-08-26 11:41:12,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.458333333333336) internal successors, (1475), 24 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states 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 11:41:12,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:12,155 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:12,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-26 11:41:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 11:41:12,360 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:12,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1880062792, now seen corresponding path program 9 times [2023-08-26 11:41:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:12,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583648458] [2023-08-26 11:41:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:12,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583648458] [2023-08-26 11:41:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583648458] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806083636] [2023-08-26 11:41:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 11:41:12,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:12,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:41:12,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 11:41:12,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-26 11:41:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:12,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 11:41:12,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:12,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 11:41:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806083636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:12,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 11:41:12,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-26 11:41:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312356484] [2023-08-26 11:41:12,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 11:41:12,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 11:41:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-26 11:41:12,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 157 [2023-08-26 11:41:12,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 179 transitions, 2846 flow. Second operand has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 11:41:12,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:12,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 157 [2023-08-26 11:41:12,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:12,953 INFO L124 PetriNetUnfolderBase]: 1331/2222 cut-off events. [2023-08-26 11:41:12,953 INFO L125 PetriNetUnfolderBase]: For 78377/78377 co-relation queries the response was YES. [2023-08-26 11:41:12,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15347 conditions, 2222 events. 1331/2222 cut-off events. For 78377/78377 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 11866 event pairs, 59 based on Foata normal form. 213/2435 useless extension candidates. Maximal degree in co-relation 15274. Up to 972 conditions per place. [2023-08-26 11:41:12,967 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 27 selfloop transitions, 7 changer transitions 463/497 dead transitions. [2023-08-26 11:41:12,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 497 transitions, 8470 flow [2023-08-26 11:41:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:41:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:41:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 551 transitions. [2023-08-26 11:41:12,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43869426751592355 [2023-08-26 11:41:12,969 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 551 transitions. [2023-08-26 11:41:12,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 551 transitions. [2023-08-26 11:41:12,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:12,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 551 transitions. [2023-08-26 11:41:12,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.875) internal successors, (551), 8 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 11:41:12,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:12,971 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:12,971 INFO L175 Difference]: Start difference. First operand has 179 places, 179 transitions, 2846 flow. Second operand 8 states and 551 transitions. [2023-08-26 11:41:12,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 497 transitions, 8470 flow [2023-08-26 11:41:13,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 497 transitions, 7834 flow, removed 188 selfloop flow, removed 11 redundant places. [2023-08-26 11:41:13,112 INFO L231 Difference]: Finished difference. Result has 173 places, 22 transitions, 274 flow [2023-08-26 11:41:13,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=274, PETRI_PLACES=173, PETRI_TRANSITIONS=22} [2023-08-26 11:41:13,113 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 151 predicate places. [2023-08-26 11:41:13,113 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 22 transitions, 274 flow [2023-08-26 11:41:13,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 11:41:13,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:13,113 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:13,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:13,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 11:41:13,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:13,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -875029135, now seen corresponding path program 10 times [2023-08-26 11:41:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:13,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248702109] [2023-08-26 11:41:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:13,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:13,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248702109] [2023-08-26 11:41:13,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248702109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:13,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020788792] [2023-08-26 11:41:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 11:41:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:13,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:13,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 11:41:13,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 11:41:13,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 11:41:13,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:13,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 11:41:13,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:13,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 11:41:13,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020788792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:13,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 11:41:13,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-26 11:41:13,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118999512] [2023-08-26 11:41:13,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:13,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 11:41:13,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 11:41:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-26 11:41:13,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 157 [2023-08-26 11:41:13,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 22 transitions, 274 flow. Second operand has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 11:41:13,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:13,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 157 [2023-08-26 11:41:13,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:13,528 INFO L124 PetriNetUnfolderBase]: 68/141 cut-off events. [2023-08-26 11:41:13,528 INFO L125 PetriNetUnfolderBase]: For 3182/3182 co-relation queries the response was YES. [2023-08-26 11:41:13,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1069 conditions, 141 events. 68/141 cut-off events. For 3182/3182 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 353 event pairs, 6 based on Foata normal form. 14/155 useless extension candidates. Maximal degree in co-relation 998. Up to 68 conditions per place. [2023-08-26 11:41:13,529 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2023-08-26 11:41:13,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 67 transitions, 813 flow [2023-08-26 11:41:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:41:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:41:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 548 transitions. [2023-08-26 11:41:13,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43630573248407645 [2023-08-26 11:41:13,530 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 548 transitions. [2023-08-26 11:41:13,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 548 transitions. [2023-08-26 11:41:13,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:13,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 548 transitions. [2023-08-26 11:41:13,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.5) internal successors, (548), 8 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 11:41:13,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,532 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,532 INFO L175 Difference]: Start difference. First operand has 173 places, 22 transitions, 274 flow. Second operand 8 states and 548 transitions. [2023-08-26 11:41:13,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 67 transitions, 813 flow [2023-08-26 11:41:13,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 67 transitions, 439 flow, removed 95 selfloop flow, removed 43 redundant places. [2023-08-26 11:41:13,535 INFO L231 Difference]: Finished difference. Result has 76 places, 0 transitions, 0 flow [2023-08-26 11:41:13,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=76, PETRI_TRANSITIONS=0} [2023-08-26 11:41:13,536 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 54 predicate places. [2023-08-26 11:41:13,536 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 0 transitions, 0 flow [2023-08-26 11:41:13,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 11:41:13,538 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-26 11:41:13,538 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 11:41:13,538 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 11:41:13,538 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 11:41:13,538 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 11:41:13,539 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-26 11:41:13,539 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2023-08-26 11:41:13,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:13,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:13,745 INFO L445 BasicCegarLoop]: Path program histogram: [10, 2, 1, 1, 1, 1] [2023-08-26 11:41:13,747 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 11:41:13,747 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 11:41:13,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 11:41:13 BasicIcfg [2023-08-26 11:41:13,749 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 11:41:13,749 INFO L158 Benchmark]: Toolchain (without parser) took 10106.06ms. Allocated memory was 406.8MB in the beginning and 622.9MB in the end (delta: 216.0MB). Free memory was 381.6MB in the beginning and 423.8MB in the end (delta: -42.2MB). Peak memory consumption was 175.2MB. Max. memory is 16.0GB. [2023-08-26 11:41:13,749 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 406.8MB. Free memory was 383.5MB in the beginning and 383.4MB in the end (delta: 77.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:41:13,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 343.17ms. Allocated memory is still 406.8MB. Free memory was 381.3MB in the beginning and 361.7MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 11:41:13,750 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.48ms. Allocated memory is still 406.8MB. Free memory was 361.7MB in the beginning and 360.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:41:13,750 INFO L158 Benchmark]: Boogie Preprocessor took 29.14ms. Allocated memory is still 406.8MB. Free memory was 360.0MB in the beginning and 358.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:41:13,750 INFO L158 Benchmark]: RCFGBuilder took 292.61ms. Allocated memory is still 406.8MB. Free memory was 358.2MB in the beginning and 345.3MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 11:41:13,750 INFO L158 Benchmark]: TraceAbstraction took 9394.67ms. Allocated memory was 406.8MB in the beginning and 622.9MB in the end (delta: 216.0MB). Free memory was 344.6MB in the beginning and 423.8MB in the end (delta: -79.2MB). Peak memory consumption was 139.6MB. Max. memory is 16.0GB. [2023-08-26 11:41:13,751 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 406.8MB. Free memory was 383.5MB in the beginning and 383.4MB in the end (delta: 77.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 343.17ms. Allocated memory is still 406.8MB. Free memory was 381.3MB in the beginning and 361.7MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.48ms. Allocated memory is still 406.8MB. Free memory was 361.7MB in the beginning and 360.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.14ms. Allocated memory is still 406.8MB. Free memory was 360.0MB in the beginning and 358.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 292.61ms. Allocated memory is still 406.8MB. Free memory was 358.2MB in the beginning and 345.3MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 9394.67ms. Allocated memory was 406.8MB in the beginning and 622.9MB in the end (delta: 216.0MB). Free memory was 344.6MB in the beginning and 423.8MB in the end (delta: -79.2MB). Peak memory consumption was 139.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 75 PlacesBefore, 22 PlacesAfterwards, 74 TransitionsBefore, 18 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 81 TotalNumberOfCompositions, 1354 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1185, independent: 1156, independent conditional: 0, independent unconditional: 1156, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 799, independent: 787, independent conditional: 0, independent unconditional: 787, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1185, independent: 369, independent conditional: 0, independent unconditional: 369, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 799, unknown conditional: 0, unknown unconditional: 799] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 693]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.3s, OverallIterations: 16, TraceHistogramMax: 6, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 998 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 998 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 101 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1767 IncrementalHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 101 mSolverCounterUnsat, 0 mSDtfsCounter, 1767 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 340 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2846occurred in iteration=14, InterpolantAutomatonStates: 167, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 275 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 317 ConstructedInterpolants, 0 QuantifiedInterpolants, 1231 SizeOfPredicates, 27 NumberOfNonLiveVariables, 988 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 28 InterpolantComputations, 11 PerfectInterpolantSequences, 95/214 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 11:41:13,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...