/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-wmm/safe035_power.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:19:05,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:19:05,161 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 12:19:05,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:19:05,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:19:05,191 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:19:05,192 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:19:05,192 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:19:05,193 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:19:05,193 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:19:05,193 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:19:05,193 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:19:05,194 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:19:05,194 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:19:05,194 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:19:05,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:19:05,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:19:05,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:19:05,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:19:05,199 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:19:05,200 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:19:05,201 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:19:05,201 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:19:05,202 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:19:05,202 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:19:05,202 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:19:05,203 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:19:05,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:19:05,203 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:19:05,203 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:19:05,204 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:19:05,204 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:19:05,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:19:05,205 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:19:05,205 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:19:05,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:19:05,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:19:05,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:19:05,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:19:05,538 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:19:05,539 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:19:05,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i [2023-08-26 12:19:06,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:19:07,124 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:19:07,125 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i [2023-08-26 12:19:07,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d02bd28c0/c1e20d2393ac465ba9e3f0d8fd40f437/FLAGd2ee3959b [2023-08-26 12:19:07,150 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d02bd28c0/c1e20d2393ac465ba9e3f0d8fd40f437 [2023-08-26 12:19:07,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:19:07,153 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:19:07,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:19:07,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:19:07,157 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:19:07,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e97ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07, skipping insertion in model container [2023-08-26 12:19:07,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,215 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:19:07,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:19:07,617 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:19:07,632 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:19:07,644 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:19:07,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:19:07,723 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:19:07,724 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:19:07,730 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:19:07,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07 WrapperNode [2023-08-26 12:19:07,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:19:07,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:19:07,731 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:19:07,731 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:19:07,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,815 INFO L138 Inliner]: procedures = 176, calls = 61, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 179 [2023-08-26 12:19:07,816 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:19:07,817 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:19:07,817 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:19:07,817 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:19:07,827 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,843 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,844 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,871 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:19:07,880 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:19:07,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:19:07,880 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:19:07,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (1/1) ... [2023-08-26 12:19:07,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:19:07,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:19:07,907 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 12:19:07,928 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 12:19:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:19:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:19:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:19:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:19:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:19:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:19:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:19:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:19:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:19:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 12:19:07,947 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 12:19:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:19:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:19:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:19:07,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:19:07,948 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 12:19:08,067 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:19:08,069 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:19:08,476 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:19:08,687 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:19:08,687 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:19:08,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:19:08 BoogieIcfgContainer [2023-08-26 12:19:08,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:19:08,692 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:19:08,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:19:08,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:19:08,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:19:07" (1/3) ... [2023-08-26 12:19:08,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e373f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:19:08, skipping insertion in model container [2023-08-26 12:19:08,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:19:07" (2/3) ... [2023-08-26 12:19:08,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e373f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:19:08, skipping insertion in model container [2023-08-26 12:19:08,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:19:08" (3/3) ... [2023-08-26 12:19:08,699 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_power.i [2023-08-26 12:19:08,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:19:08,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-26 12:19:08,717 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:19:08,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:19:08,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 122 transitions, 259 flow [2023-08-26 12:19:08,893 INFO L124 PetriNetUnfolderBase]: 3/119 cut-off events. [2023-08-26 12:19:08,894 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:19:08,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 119 events. 3/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-08-26 12:19:08,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 122 transitions, 259 flow [2023-08-26 12:19:08,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 119 transitions, 247 flow [2023-08-26 12:19:08,908 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:19:08,928 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 119 transitions, 247 flow [2023-08-26 12:19:08,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 119 transitions, 247 flow [2023-08-26 12:19:08,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 119 transitions, 247 flow [2023-08-26 12:19:08,966 INFO L124 PetriNetUnfolderBase]: 3/119 cut-off events. [2023-08-26 12:19:08,967 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:19:08,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 119 events. 3/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-08-26 12:19:08,969 INFO L119 LiptonReduction]: Number of co-enabled transitions 2498 [2023-08-26 12:19:13,752 INFO L134 LiptonReduction]: Checked pairs total: 7961 [2023-08-26 12:19:13,753 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-26 12:19:13,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:19:13,770 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;@77d87e78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:19:13,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-26 12:19:13,772 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:19:13,772 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:19:13,772 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:19:13,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:13,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:19:13,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:13,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash 650, now seen corresponding path program 1 times [2023-08-26 12:19:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946145010] [2023-08-26 12:19:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:13,879 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 12:19:13,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:13,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946145010] [2023-08-26 12:19:13,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946145010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:13,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:13,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:19:13,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751675623] [2023-08-26 12:19:13,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:13,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:19:13,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:13,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:19:13,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:19:13,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 243 [2023-08-26 12:19:13,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:13,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:13,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 243 [2023-08-26 12:19:13,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:14,623 INFO L124 PetriNetUnfolderBase]: 2512/3635 cut-off events. [2023-08-26 12:19:14,624 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-26 12:19:14,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7345 conditions, 3635 events. 2512/3635 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16562 event pairs, 2512 based on Foata normal form. 0/3274 useless extension candidates. Maximal degree in co-relation 7334. Up to 3634 conditions per place. [2023-08-26 12:19:14,653 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 25 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-08-26 12:19:14,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 111 flow [2023-08-26 12:19:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:19:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:19:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 237 transitions. [2023-08-26 12:19:14,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2023-08-26 12:19:14,666 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 237 transitions. [2023-08-26 12:19:14,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 237 transitions. [2023-08-26 12:19:14,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:14,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 237 transitions. [2023-08-26 12:19:14,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 118.5) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:14,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:14,678 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:14,679 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 2 states and 237 transitions. [2023-08-26 12:19:14,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 111 flow [2023-08-26 12:19:14,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:19:14,684 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 58 flow [2023-08-26 12:19:14,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-26 12:19:14,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2023-08-26 12:19:14,689 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 58 flow [2023-08-26 12:19:14,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:14,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:14,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:14,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:19:14,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:14,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1917472490, now seen corresponding path program 1 times [2023-08-26 12:19:14,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:14,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376953230] [2023-08-26 12:19:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:14,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:15,012 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 12:19:15,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:15,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376953230] [2023-08-26 12:19:15,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376953230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:15,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:15,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:19:15,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56988644] [2023-08-26 12:19:15,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:15,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:19:15,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:19:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:19:15,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 243 [2023-08-26 12:19:15,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:15,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:15,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 243 [2023-08-26 12:19:15,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:15,502 INFO L124 PetriNetUnfolderBase]: 2147/3120 cut-off events. [2023-08-26 12:19:15,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:19:15,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6313 conditions, 3120 events. 2147/3120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14561 event pairs, 322 based on Foata normal form. 0/2939 useless extension candidates. Maximal degree in co-relation 6310. Up to 2576 conditions per place. [2023-08-26 12:19:15,517 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 33 selfloop transitions, 2 changer transitions 2/38 dead transitions. [2023-08-26 12:19:15,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 156 flow [2023-08-26 12:19:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:19:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:19:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-26 12:19:15,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718792866941015 [2023-08-26 12:19:15,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-26 12:19:15,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-26 12:19:15,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:15,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-26 12:19:15,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:15,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:15,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:15,531 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 58 flow. Second operand 3 states and 344 transitions. [2023-08-26 12:19:15,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 156 flow [2023-08-26 12:19:15,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:19:15,534 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 58 flow [2023-08-26 12:19:15,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-26 12:19:15,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 12:19:15,537 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 58 flow [2023-08-26 12:19:15,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:15,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:15,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:15,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:19:15,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:15,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash -150069699, now seen corresponding path program 1 times [2023-08-26 12:19:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:15,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189926315] [2023-08-26 12:19:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:15,796 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 12:19:15,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:15,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189926315] [2023-08-26 12:19:15,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189926315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:15,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:15,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:19:15,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317299378] [2023-08-26 12:19:15,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:15,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:19:15,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:15,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:19:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:19:15,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 243 [2023-08-26 12:19:15,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:15,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:15,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 243 [2023-08-26 12:19:15,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:16,135 INFO L124 PetriNetUnfolderBase]: 1466/2169 cut-off events. [2023-08-26 12:19:16,135 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-26 12:19:16,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 2169 events. 1466/2169 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9224 event pairs, 698 based on Foata normal form. 90/2258 useless extension candidates. Maximal degree in co-relation 4499. Up to 1189 conditions per place. [2023-08-26 12:19:16,146 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 32 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-26 12:19:16,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 148 flow [2023-08-26 12:19:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:19:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:19:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-26 12:19:16,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46776406035665297 [2023-08-26 12:19:16,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-26 12:19:16,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-26 12:19:16,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:16,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-26 12:19:16,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:16,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:16,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:16,153 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 58 flow. Second operand 3 states and 341 transitions. [2023-08-26 12:19:16,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 148 flow [2023-08-26 12:19:16,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:19:16,156 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 62 flow [2023-08-26 12:19:16,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-26 12:19:16,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 12:19:16,157 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 62 flow [2023-08-26 12:19:16,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:16,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:16,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:16,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:19:16,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:16,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash 278612808, now seen corresponding path program 1 times [2023-08-26 12:19:16,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:16,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852996765] [2023-08-26 12:19:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:16,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:17,091 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 12:19:17,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:17,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852996765] [2023-08-26 12:19:17,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852996765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:17,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:17,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:19:17,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67572054] [2023-08-26 12:19:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:17,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:19:17,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:17,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:19:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:19:17,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 243 [2023-08-26 12:19:17,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:17,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:17,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 243 [2023-08-26 12:19:17,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:17,648 INFO L124 PetriNetUnfolderBase]: 2031/3004 cut-off events. [2023-08-26 12:19:17,649 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-26 12:19:17,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6506 conditions, 3004 events. 2031/3004 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14065 event pairs, 692 based on Foata normal form. 30/3034 useless extension candidates. Maximal degree in co-relation 6501. Up to 2386 conditions per place. [2023-08-26 12:19:17,668 INFO L140 encePairwiseOnDemand]: 231/243 looper letters, 39 selfloop transitions, 19 changer transitions 0/59 dead transitions. [2023-08-26 12:19:17,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 255 flow [2023-08-26 12:19:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:19:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:19:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-08-26 12:19:17,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355281207133059 [2023-08-26 12:19:17,671 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-08-26 12:19:17,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-08-26 12:19:17,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:17,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-08-26 12:19:17,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:17,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:17,676 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:17,676 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 62 flow. Second operand 6 states and 635 transitions. [2023-08-26 12:19:17,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 255 flow [2023-08-26 12:19:17,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:19:17,685 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 175 flow [2023-08-26 12:19:17,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=175, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-08-26 12:19:17,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-26 12:19:17,686 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 175 flow [2023-08-26 12:19:17,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:17,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:17,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:17,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:19:17,687 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:17,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash 275131818, now seen corresponding path program 2 times [2023-08-26 12:19:17,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:17,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210456224] [2023-08-26 12:19:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:18,821 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 12:19:18,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:18,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210456224] [2023-08-26 12:19:18,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210456224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:18,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:18,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:19:18,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89065053] [2023-08-26 12:19:18,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:18,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:19:18,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:19:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:19:18,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 243 [2023-08-26 12:19:18,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:18,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:18,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 243 [2023-08-26 12:19:18,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:19,603 INFO L124 PetriNetUnfolderBase]: 2230/3295 cut-off events. [2023-08-26 12:19:19,603 INFO L125 PetriNetUnfolderBase]: For 1841/1841 co-relation queries the response was YES. [2023-08-26 12:19:19,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9939 conditions, 3295 events. 2230/3295 cut-off events. For 1841/1841 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15467 event pairs, 585 based on Foata normal form. 16/3311 useless extension candidates. Maximal degree in co-relation 9931. Up to 2982 conditions per place. [2023-08-26 12:19:19,622 INFO L140 encePairwiseOnDemand]: 231/243 looper letters, 66 selfloop transitions, 41 changer transitions 0/108 dead transitions. [2023-08-26 12:19:19,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 108 transitions, 649 flow [2023-08-26 12:19:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:19:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:19:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 847 transitions. [2023-08-26 12:19:19,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43569958847736623 [2023-08-26 12:19:19,626 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 847 transitions. [2023-08-26 12:19:19,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 847 transitions. [2023-08-26 12:19:19,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:19,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 847 transitions. [2023-08-26 12:19:19,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.875) internal successors, (847), 8 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:19,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 243.0) internal successors, (2187), 9 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:19,633 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 243.0) internal successors, (2187), 9 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:19,633 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 175 flow. Second operand 8 states and 847 transitions. [2023-08-26 12:19:19,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 108 transitions, 649 flow [2023-08-26 12:19:19,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 108 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:19:19,639 INFO L231 Difference]: Finished difference. Result has 50 places, 78 transitions, 518 flow [2023-08-26 12:19:19,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=518, PETRI_PLACES=50, PETRI_TRANSITIONS=78} [2023-08-26 12:19:19,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-08-26 12:19:19,641 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 78 transitions, 518 flow [2023-08-26 12:19:19,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:19,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:19,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:19,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:19:19,642 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:19,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash 275239698, now seen corresponding path program 3 times [2023-08-26 12:19:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:19,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083181428] [2023-08-26 12:19:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:20,257 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 12:19:20,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:20,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083181428] [2023-08-26 12:19:20,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083181428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:20,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:20,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:19:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679945547] [2023-08-26 12:19:20,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:20,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:19:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:19:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:19:20,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 243 [2023-08-26 12:19:20,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 78 transitions, 518 flow. Second operand has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:20,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:20,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 243 [2023-08-26 12:19:20,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:21,171 INFO L124 PetriNetUnfolderBase]: 3365/4996 cut-off events. [2023-08-26 12:19:21,172 INFO L125 PetriNetUnfolderBase]: For 6961/6961 co-relation queries the response was YES. [2023-08-26 12:19:21,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18355 conditions, 4996 events. 3365/4996 cut-off events. For 6961/6961 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25823 event pairs, 614 based on Foata normal form. 30/5026 useless extension candidates. Maximal degree in co-relation 18344. Up to 2415 conditions per place. [2023-08-26 12:19:21,217 INFO L140 encePairwiseOnDemand]: 230/243 looper letters, 118 selfloop transitions, 42 changer transitions 0/161 dead transitions. [2023-08-26 12:19:21,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 161 transitions, 1346 flow [2023-08-26 12:19:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:19:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:19:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-08-26 12:19:21,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2023-08-26 12:19:21,220 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-08-26 12:19:21,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-08-26 12:19:21,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:21,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-08-26 12:19:21,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:21,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:21,224 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:21,224 INFO L175 Difference]: Start difference. First operand has 50 places, 78 transitions, 518 flow. Second operand 5 states and 558 transitions. [2023-08-26 12:19:21,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 161 transitions, 1346 flow [2023-08-26 12:19:21,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 161 transitions, 1264 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-26 12:19:21,270 INFO L231 Difference]: Finished difference. Result has 55 places, 111 transitions, 920 flow [2023-08-26 12:19:21,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=920, PETRI_PLACES=55, PETRI_TRANSITIONS=111} [2023-08-26 12:19:21,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-26 12:19:21,272 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 111 transitions, 920 flow [2023-08-26 12:19:21,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:21,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:21,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:21,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:19:21,273 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:21,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:21,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2121013037, now seen corresponding path program 1 times [2023-08-26 12:19:21,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:21,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885096870] [2023-08-26 12:19:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:21,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:22,345 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 12:19:22,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:22,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885096870] [2023-08-26 12:19:22,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885096870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:22,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:22,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:19:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404221385] [2023-08-26 12:19:22,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:19:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:19:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:19:22,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 243 [2023-08-26 12:19:22,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 111 transitions, 920 flow. Second operand has 8 states, 8 states have (on average 93.625) internal successors, (749), 8 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:22,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:22,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 243 [2023-08-26 12:19:22,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:23,809 INFO L124 PetriNetUnfolderBase]: 4881/7384 cut-off events. [2023-08-26 12:19:23,809 INFO L125 PetriNetUnfolderBase]: For 15751/15751 co-relation queries the response was YES. [2023-08-26 12:19:23,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31589 conditions, 7384 events. 4881/7384 cut-off events. For 15751/15751 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42232 event pairs, 784 based on Foata normal form. 46/7430 useless extension candidates. Maximal degree in co-relation 31575. Up to 4542 conditions per place. [2023-08-26 12:19:23,874 INFO L140 encePairwiseOnDemand]: 231/243 looper letters, 150 selfloop transitions, 56 changer transitions 0/207 dead transitions. [2023-08-26 12:19:23,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 207 transitions, 1986 flow [2023-08-26 12:19:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:19:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:19:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-08-26 12:19:23,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355281207133059 [2023-08-26 12:19:23,878 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-08-26 12:19:23,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-08-26 12:19:23,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:23,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-08-26 12:19:23,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:23,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:23,883 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:23,883 INFO L175 Difference]: Start difference. First operand has 55 places, 111 transitions, 920 flow. Second operand 6 states and 635 transitions. [2023-08-26 12:19:23,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 207 transitions, 1986 flow [2023-08-26 12:19:23,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 207 transitions, 1957 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 12:19:23,962 INFO L231 Difference]: Finished difference. Result has 63 places, 158 transitions, 1599 flow [2023-08-26 12:19:23,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1599, PETRI_PLACES=63, PETRI_TRANSITIONS=158} [2023-08-26 12:19:23,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2023-08-26 12:19:23,963 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 158 transitions, 1599 flow [2023-08-26 12:19:23,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 93.625) internal successors, (749), 8 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:23,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:23,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:23,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:19:23,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:23,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -17583499, now seen corresponding path program 2 times [2023-08-26 12:19:23,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:23,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583975233] [2023-08-26 12:19:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:23,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:24,709 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 12:19:24,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583975233] [2023-08-26 12:19:24,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583975233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:24,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:24,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:19:24,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824914588] [2023-08-26 12:19:24,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:24,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:19:24,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:24,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:19:24,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:19:24,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 243 [2023-08-26 12:19:24,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 158 transitions, 1599 flow. Second operand has 8 states, 8 states have (on average 95.625) internal successors, (765), 8 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:24,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:24,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 243 [2023-08-26 12:19:24,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:26,329 INFO L124 PetriNetUnfolderBase]: 6064/9259 cut-off events. [2023-08-26 12:19:26,329 INFO L125 PetriNetUnfolderBase]: For 45583/45583 co-relation queries the response was YES. [2023-08-26 12:19:26,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45959 conditions, 9259 events. 6064/9259 cut-off events. For 45583/45583 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 56266 event pairs, 1169 based on Foata normal form. 308/9567 useless extension candidates. Maximal degree in co-relation 45941. Up to 5303 conditions per place. [2023-08-26 12:19:26,400 INFO L140 encePairwiseOnDemand]: 230/243 looper letters, 134 selfloop transitions, 101 changer transitions 10/246 dead transitions. [2023-08-26 12:19:26,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 246 transitions, 2709 flow [2023-08-26 12:19:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:19:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:19:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 949 transitions. [2023-08-26 12:19:26,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43392775491540925 [2023-08-26 12:19:26,404 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 949 transitions. [2023-08-26 12:19:26,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 949 transitions. [2023-08-26 12:19:26,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:26,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 949 transitions. [2023-08-26 12:19:26,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.44444444444444) internal successors, (949), 9 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:26,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:26,412 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:26,412 INFO L175 Difference]: Start difference. First operand has 63 places, 158 transitions, 1599 flow. Second operand 9 states and 949 transitions. [2023-08-26 12:19:26,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 246 transitions, 2709 flow [2023-08-26 12:19:26,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 246 transitions, 2681 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-08-26 12:19:26,519 INFO L231 Difference]: Finished difference. Result has 73 places, 169 transitions, 1949 flow [2023-08-26 12:19:26,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1949, PETRI_PLACES=73, PETRI_TRANSITIONS=169} [2023-08-26 12:19:26,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2023-08-26 12:19:26,521 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 169 transitions, 1949 flow [2023-08-26 12:19:26,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.625) internal successors, (765), 8 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:26,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:26,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:26,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:19:26,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:26,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash -59588809, now seen corresponding path program 3 times [2023-08-26 12:19:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:26,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918308940] [2023-08-26 12:19:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:26,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:27,271 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 12:19:27,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:27,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918308940] [2023-08-26 12:19:27,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918308940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:27,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:27,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:19:27,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994981435] [2023-08-26 12:19:27,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:27,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:19:27,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:19:27,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:19:27,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 243 [2023-08-26 12:19:27,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 169 transitions, 1949 flow. Second operand has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:27,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:27,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 243 [2023-08-26 12:19:27,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:29,132 INFO L124 PetriNetUnfolderBase]: 6618/10269 cut-off events. [2023-08-26 12:19:29,132 INFO L125 PetriNetUnfolderBase]: For 52537/52537 co-relation queries the response was YES. [2023-08-26 12:19:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53707 conditions, 10269 events. 6618/10269 cut-off events. For 52537/52537 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 65351 event pairs, 875 based on Foata normal form. 88/10357 useless extension candidates. Maximal degree in co-relation 53686. Up to 5173 conditions per place. [2023-08-26 12:19:29,228 INFO L140 encePairwiseOnDemand]: 230/243 looper letters, 110 selfloop transitions, 139 changer transitions 1/251 dead transitions. [2023-08-26 12:19:29,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 251 transitions, 3101 flow [2023-08-26 12:19:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:19:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:19:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 955 transitions. [2023-08-26 12:19:29,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366712391403749 [2023-08-26 12:19:29,231 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 955 transitions. [2023-08-26 12:19:29,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 955 transitions. [2023-08-26 12:19:29,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:29,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 955 transitions. [2023-08-26 12:19:29,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.11111111111111) internal successors, (955), 9 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:29,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:29,238 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:29,238 INFO L175 Difference]: Start difference. First operand has 73 places, 169 transitions, 1949 flow. Second operand 9 states and 955 transitions. [2023-08-26 12:19:29,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 251 transitions, 3101 flow [2023-08-26 12:19:29,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 251 transitions, 2968 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-26 12:19:29,546 INFO L231 Difference]: Finished difference. Result has 81 places, 207 transitions, 2769 flow [2023-08-26 12:19:29,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2769, PETRI_PLACES=81, PETRI_TRANSITIONS=207} [2023-08-26 12:19:29,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2023-08-26 12:19:29,547 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 207 transitions, 2769 flow [2023-08-26 12:19:29,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:29,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:29,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:29,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:19:29,548 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:29,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash -60914989, now seen corresponding path program 4 times [2023-08-26 12:19:29,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:29,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136203119] [2023-08-26 12:19:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:29,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:29,721 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 12:19:29,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:29,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136203119] [2023-08-26 12:19:29,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136203119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:29,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:29,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:19:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685693287] [2023-08-26 12:19:29,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:29,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:19:29,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:29,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:19:29,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:19:29,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 243 [2023-08-26 12:19:29,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 207 transitions, 2769 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:29,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:29,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 243 [2023-08-26 12:19:29,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:30,702 INFO L124 PetriNetUnfolderBase]: 3924/6460 cut-off events. [2023-08-26 12:19:30,702 INFO L125 PetriNetUnfolderBase]: For 58594/58594 co-relation queries the response was YES. [2023-08-26 12:19:30,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37713 conditions, 6460 events. 3924/6460 cut-off events. For 58594/58594 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42218 event pairs, 710 based on Foata normal form. 672/7131 useless extension candidates. Maximal degree in co-relation 37688. Up to 2754 conditions per place. [2023-08-26 12:19:30,735 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 321 selfloop transitions, 5 changer transitions 6/333 dead transitions. [2023-08-26 12:19:30,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 333 transitions, 5199 flow [2023-08-26 12:19:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:19:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:19:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 442 transitions. [2023-08-26 12:19:30,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4547325102880658 [2023-08-26 12:19:30,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 442 transitions. [2023-08-26 12:19:30,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 442 transitions. [2023-08-26 12:19:30,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:30,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 442 transitions. [2023-08-26 12:19:30,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:30,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:30,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:30,740 INFO L175 Difference]: Start difference. First operand has 81 places, 207 transitions, 2769 flow. Second operand 4 states and 442 transitions. [2023-08-26 12:19:30,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 333 transitions, 5199 flow [2023-08-26 12:19:30,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 333 transitions, 5032 flow, removed 49 selfloop flow, removed 3 redundant places. [2023-08-26 12:19:30,868 INFO L231 Difference]: Finished difference. Result has 83 places, 173 transitions, 2260 flow [2023-08-26 12:19:30,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2260, PETRI_PLACES=83, PETRI_TRANSITIONS=173} [2023-08-26 12:19:30,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2023-08-26 12:19:30,870 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 173 transitions, 2260 flow [2023-08-26 12:19:30,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:30,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:30,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:30,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:19:30,870 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:30,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash 524377912, now seen corresponding path program 1 times [2023-08-26 12:19:30,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:30,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659125983] [2023-08-26 12:19:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:30,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:31,071 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 12:19:31,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:31,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659125983] [2023-08-26 12:19:31,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659125983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:31,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:31,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:19:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838062439] [2023-08-26 12:19:31,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:31,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:19:31,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:19:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:19:31,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 243 [2023-08-26 12:19:31,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 173 transitions, 2260 flow. Second operand has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:31,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:31,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 243 [2023-08-26 12:19:31,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:31,601 INFO L124 PetriNetUnfolderBase]: 1685/2946 cut-off events. [2023-08-26 12:19:31,601 INFO L125 PetriNetUnfolderBase]: For 30449/30449 co-relation queries the response was YES. [2023-08-26 12:19:31,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18273 conditions, 2946 events. 1685/2946 cut-off events. For 30449/30449 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17812 event pairs, 173 based on Foata normal form. 312/3257 useless extension candidates. Maximal degree in co-relation 18246. Up to 1338 conditions per place. [2023-08-26 12:19:31,620 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 273 selfloop transitions, 8 changer transitions 10/292 dead transitions. [2023-08-26 12:19:31,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 292 transitions, 4398 flow [2023-08-26 12:19:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:19:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:19:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-08-26 12:19:31,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45596707818930043 [2023-08-26 12:19:31,622 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-08-26 12:19:31,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-08-26 12:19:31,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:31,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-08-26 12:19:31,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:31,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:31,626 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:31,626 INFO L175 Difference]: Start difference. First operand has 83 places, 173 transitions, 2260 flow. Second operand 5 states and 554 transitions. [2023-08-26 12:19:31,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 292 transitions, 4398 flow [2023-08-26 12:19:31,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 292 transitions, 4324 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-26 12:19:31,681 INFO L231 Difference]: Finished difference. Result has 86 places, 146 transitions, 1849 flow [2023-08-26 12:19:31,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1849, PETRI_PLACES=86, PETRI_TRANSITIONS=146} [2023-08-26 12:19:31,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2023-08-26 12:19:31,682 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 146 transitions, 1849 flow [2023-08-26 12:19:31,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:31,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:31,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:31,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:19:31,683 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:31,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:31,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1848309091, now seen corresponding path program 1 times [2023-08-26 12:19:31,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:31,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949933996] [2023-08-26 12:19:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:31,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:32,832 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 12:19:32,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949933996] [2023-08-26 12:19:32,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949933996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:32,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:32,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:19:32,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344008075] [2023-08-26 12:19:32,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:32,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:19:32,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:19:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:19:32,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 243 [2023-08-26 12:19:32,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 146 transitions, 1849 flow. Second operand has 9 states, 9 states have (on average 95.0) internal successors, (855), 9 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:32,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:32,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 243 [2023-08-26 12:19:32,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:33,311 INFO L124 PetriNetUnfolderBase]: 1367/2490 cut-off events. [2023-08-26 12:19:33,311 INFO L125 PetriNetUnfolderBase]: For 20449/20449 co-relation queries the response was YES. [2023-08-26 12:19:33,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16256 conditions, 2490 events. 1367/2490 cut-off events. For 20449/20449 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14753 event pairs, 176 based on Foata normal form. 12/2502 useless extension candidates. Maximal degree in co-relation 16229. Up to 1657 conditions per place. [2023-08-26 12:19:33,328 INFO L140 encePairwiseOnDemand]: 232/243 looper letters, 136 selfloop transitions, 55 changer transitions 12/204 dead transitions. [2023-08-26 12:19:33,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 204 transitions, 2781 flow [2023-08-26 12:19:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:19:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:19:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 627 transitions. [2023-08-26 12:19:33,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43004115226337447 [2023-08-26 12:19:33,331 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 627 transitions. [2023-08-26 12:19:33,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 627 transitions. [2023-08-26 12:19:33,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:33,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 627 transitions. [2023-08-26 12:19:33,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.5) internal successors, (627), 6 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:33,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:33,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:33,336 INFO L175 Difference]: Start difference. First operand has 86 places, 146 transitions, 1849 flow. Second operand 6 states and 627 transitions. [2023-08-26 12:19:33,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 204 transitions, 2781 flow [2023-08-26 12:19:33,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 204 transitions, 2667 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-26 12:19:33,404 INFO L231 Difference]: Finished difference. Result has 87 places, 156 transitions, 2098 flow [2023-08-26 12:19:33,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2098, PETRI_PLACES=87, PETRI_TRANSITIONS=156} [2023-08-26 12:19:33,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2023-08-26 12:19:33,405 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 156 transitions, 2098 flow [2023-08-26 12:19:33,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 95.0) internal successors, (855), 9 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:33,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:33,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:33,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:19:33,406 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:33,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:33,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1071785673, now seen corresponding path program 2 times [2023-08-26 12:19:33,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:33,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648782843] [2023-08-26 12:19:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:33,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:34,414 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 12:19:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:34,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648782843] [2023-08-26 12:19:34,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648782843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:34,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:34,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:19:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867473147] [2023-08-26 12:19:34,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:19:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:19:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:19:34,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 243 [2023-08-26 12:19:34,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 156 transitions, 2098 flow. Second operand has 8 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:34,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:34,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 243 [2023-08-26 12:19:34,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:35,141 INFO L124 PetriNetUnfolderBase]: 1425/2611 cut-off events. [2023-08-26 12:19:35,142 INFO L125 PetriNetUnfolderBase]: For 24410/24410 co-relation queries the response was YES. [2023-08-26 12:19:35,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17265 conditions, 2611 events. 1425/2611 cut-off events. For 24410/24410 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15892 event pairs, 280 based on Foata normal form. 23/2632 useless extension candidates. Maximal degree in co-relation 17238. Up to 1045 conditions per place. [2023-08-26 12:19:35,160 INFO L140 encePairwiseOnDemand]: 231/243 looper letters, 116 selfloop transitions, 42 changer transitions 56/215 dead transitions. [2023-08-26 12:19:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 215 transitions, 2971 flow [2023-08-26 12:19:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:19:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:19:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 744 transitions. [2023-08-26 12:19:35,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43738977072310403 [2023-08-26 12:19:35,165 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 744 transitions. [2023-08-26 12:19:35,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 744 transitions. [2023-08-26 12:19:35,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:35,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 744 transitions. [2023-08-26 12:19:35,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:35,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:35,170 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:35,170 INFO L175 Difference]: Start difference. First operand has 87 places, 156 transitions, 2098 flow. Second operand 7 states and 744 transitions. [2023-08-26 12:19:35,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 215 transitions, 2971 flow [2023-08-26 12:19:35,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 215 transitions, 2891 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-26 12:19:35,228 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 1497 flow [2023-08-26 12:19:35,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1497, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2023-08-26 12:19:35,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2023-08-26 12:19:35,230 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 1497 flow [2023-08-26 12:19:35,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:35,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:35,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:35,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:19:35,231 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:35,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1511067317, now seen corresponding path program 3 times [2023-08-26 12:19:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:35,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707796564] [2023-08-26 12:19:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:36,757 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 12:19:36,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:36,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707796564] [2023-08-26 12:19:36,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707796564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:36,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:36,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 12:19:36,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441087287] [2023-08-26 12:19:36,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:36,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 12:19:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 12:19:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-26 12:19:36,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 243 [2023-08-26 12:19:36,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 1497 flow. Second operand has 10 states, 10 states have (on average 93.8) internal successors, (938), 10 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:36,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:36,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 243 [2023-08-26 12:19:36,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:37,308 INFO L124 PetriNetUnfolderBase]: 1141/2162 cut-off events. [2023-08-26 12:19:37,308 INFO L125 PetriNetUnfolderBase]: For 20163/20163 co-relation queries the response was YES. [2023-08-26 12:19:37,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13995 conditions, 2162 events. 1141/2162 cut-off events. For 20163/20163 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12981 event pairs, 173 based on Foata normal form. 10/2171 useless extension candidates. Maximal degree in co-relation 13967. Up to 1119 conditions per place. [2023-08-26 12:19:37,321 INFO L140 encePairwiseOnDemand]: 232/243 looper letters, 102 selfloop transitions, 58 changer transitions 19/180 dead transitions. [2023-08-26 12:19:37,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 180 transitions, 2504 flow [2023-08-26 12:19:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:19:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:19:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 626 transitions. [2023-08-26 12:19:37,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42935528120713307 [2023-08-26 12:19:37,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 626 transitions. [2023-08-26 12:19:37,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 626 transitions. [2023-08-26 12:19:37,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:37,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 626 transitions. [2023-08-26 12:19:37,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.33333333333333) internal successors, (626), 6 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:37,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:37,329 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:37,329 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 1497 flow. Second operand 6 states and 626 transitions. [2023-08-26 12:19:37,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 180 transitions, 2504 flow [2023-08-26 12:19:37,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 180 transitions, 2262 flow, removed 71 selfloop flow, removed 7 redundant places. [2023-08-26 12:19:37,373 INFO L231 Difference]: Finished difference. Result has 91 places, 130 transitions, 1746 flow [2023-08-26 12:19:37,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1746, PETRI_PLACES=91, PETRI_TRANSITIONS=130} [2023-08-26 12:19:37,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2023-08-26 12:19:37,374 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 130 transitions, 1746 flow [2023-08-26 12:19:37,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 93.8) internal successors, (938), 10 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:37,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:37,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:37,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:19:37,375 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:37,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2009750277, now seen corresponding path program 4 times [2023-08-26 12:19:37,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:37,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042583844] [2023-08-26 12:19:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:37,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:38,342 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 12:19:38,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:38,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042583844] [2023-08-26 12:19:38,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042583844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:38,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:38,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:19:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649130149] [2023-08-26 12:19:38,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:38,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:19:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:19:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:19:38,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 243 [2023-08-26 12:19:38,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 130 transitions, 1746 flow. Second operand has 8 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:38,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:38,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 243 [2023-08-26 12:19:38,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:38,987 INFO L124 PetriNetUnfolderBase]: 1251/2395 cut-off events. [2023-08-26 12:19:38,987 INFO L125 PetriNetUnfolderBase]: For 21997/21997 co-relation queries the response was YES. [2023-08-26 12:19:38,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15362 conditions, 2395 events. 1251/2395 cut-off events. For 21997/21997 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14868 event pairs, 154 based on Foata normal form. 13/2407 useless extension candidates. Maximal degree in co-relation 15332. Up to 932 conditions per place. [2023-08-26 12:19:39,003 INFO L140 encePairwiseOnDemand]: 232/243 looper letters, 71 selfloop transitions, 36 changer transitions 104/212 dead transitions. [2023-08-26 12:19:39,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 212 transitions, 3072 flow [2023-08-26 12:19:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:19:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:19:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 730 transitions. [2023-08-26 12:19:39,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42915931804820695 [2023-08-26 12:19:39,006 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 730 transitions. [2023-08-26 12:19:39,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 730 transitions. [2023-08-26 12:19:39,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:39,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 730 transitions. [2023-08-26 12:19:39,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,011 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,012 INFO L175 Difference]: Start difference. First operand has 91 places, 130 transitions, 1746 flow. Second operand 7 states and 730 transitions. [2023-08-26 12:19:39,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 212 transitions, 3072 flow [2023-08-26 12:19:39,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 212 transitions, 2936 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-08-26 12:19:39,061 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 1191 flow [2023-08-26 12:19:39,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2023-08-26 12:19:39,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2023-08-26 12:19:39,062 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 1191 flow [2023-08-26 12:19:39,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:39,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:39,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:19:39,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:39,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1223071253, now seen corresponding path program 5 times [2023-08-26 12:19:39,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:39,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640577462] [2023-08-26 12:19:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:39,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:39,281 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 12:19:39,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:39,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640577462] [2023-08-26 12:19:39,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640577462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:39,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:39,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:19:39,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540616233] [2023-08-26 12:19:39,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:39,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:19:39,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:19:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:19:39,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 243 [2023-08-26 12:19:39,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 1191 flow. Second operand has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:39,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 243 [2023-08-26 12:19:39,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:39,463 INFO L124 PetriNetUnfolderBase]: 325/623 cut-off events. [2023-08-26 12:19:39,463 INFO L125 PetriNetUnfolderBase]: For 7674/7674 co-relation queries the response was YES. [2023-08-26 12:19:39,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4348 conditions, 623 events. 325/623 cut-off events. For 7674/7674 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2803 event pairs, 35 based on Foata normal form. 25/646 useless extension candidates. Maximal degree in co-relation 4317. Up to 281 conditions per place. [2023-08-26 12:19:39,467 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 127 selfloop transitions, 11 changer transitions 1/140 dead transitions. [2023-08-26 12:19:39,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 2361 flow [2023-08-26 12:19:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:19:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:19:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 629 transitions. [2023-08-26 12:19:39,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43141289437585734 [2023-08-26 12:19:39,471 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 629 transitions. [2023-08-26 12:19:39,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 629 transitions. [2023-08-26 12:19:39,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:39,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 629 transitions. [2023-08-26 12:19:39,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.83333333333333) internal successors, (629), 6 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,474 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,475 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 1191 flow. Second operand 6 states and 629 transitions. [2023-08-26 12:19:39,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 2361 flow [2023-08-26 12:19:39,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 140 transitions, 1901 flow, removed 104 selfloop flow, removed 18 redundant places. [2023-08-26 12:19:39,492 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 957 flow [2023-08-26 12:19:39,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=957, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2023-08-26 12:19:39,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2023-08-26 12:19:39,493 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 957 flow [2023-08-26 12:19:39,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:39,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:39,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:19:39,494 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:39,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:39,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1742371128, now seen corresponding path program 1 times [2023-08-26 12:19:39,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:39,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062878469] [2023-08-26 12:19:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:39,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:39,840 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 12:19:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062878469] [2023-08-26 12:19:39,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062878469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:39,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:39,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:19:39,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505267867] [2023-08-26 12:19:39,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:39,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:19:39,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:39,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:19:39,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:19:39,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 243 [2023-08-26 12:19:39,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 957 flow. Second operand has 7 states, 7 states have (on average 100.42857142857143) internal successors, (703), 7 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:39,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:39,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 243 [2023-08-26 12:19:39,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:40,186 INFO L124 PetriNetUnfolderBase]: 567/1032 cut-off events. [2023-08-26 12:19:40,186 INFO L125 PetriNetUnfolderBase]: For 7477/7477 co-relation queries the response was YES. [2023-08-26 12:19:40,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6388 conditions, 1032 events. 567/1032 cut-off events. For 7477/7477 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5123 event pairs, 55 based on Foata normal form. 3/1035 useless extension candidates. Maximal degree in co-relation 6364. Up to 435 conditions per place. [2023-08-26 12:19:40,190 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 39 selfloop transitions, 1 changer transitions 131/171 dead transitions. [2023-08-26 12:19:40,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 171 transitions, 2302 flow [2023-08-26 12:19:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:19:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:19:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 752 transitions. [2023-08-26 12:19:40,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442092886537331 [2023-08-26 12:19:40,195 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 752 transitions. [2023-08-26 12:19:40,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 752 transitions. [2023-08-26 12:19:40,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:40,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 752 transitions. [2023-08-26 12:19:40,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:40,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:40,199 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 243.0) internal successors, (1944), 8 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:40,200 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 957 flow. Second operand 7 states and 752 transitions. [2023-08-26 12:19:40,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 171 transitions, 2302 flow [2023-08-26 12:19:40,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 171 transitions, 2051 flow, removed 44 selfloop flow, removed 9 redundant places. [2023-08-26 12:19:40,216 INFO L231 Difference]: Finished difference. Result has 82 places, 34 transitions, 258 flow [2023-08-26 12:19:40,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=82, PETRI_TRANSITIONS=34} [2023-08-26 12:19:40,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2023-08-26 12:19:40,217 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 34 transitions, 258 flow [2023-08-26 12:19:40,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.42857142857143) internal successors, (703), 7 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:40,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:40,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:40,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:19:40,218 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 12:19:40,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash 601700024, now seen corresponding path program 2 times [2023-08-26 12:19:40,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:40,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943493051] [2023-08-26 12:19:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:40,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:41,218 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 12:19:41,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:41,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943493051] [2023-08-26 12:19:41,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943493051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:41,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:41,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:19:41,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131706228] [2023-08-26 12:19:41,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:41,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:19:41,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:41,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:19:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:19:41,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 243 [2023-08-26 12:19:41,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 34 transitions, 258 flow. Second operand has 8 states, 8 states have (on average 96.875) internal successors, (775), 8 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:41,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:41,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 243 [2023-08-26 12:19:41,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:41,366 INFO L124 PetriNetUnfolderBase]: 119/240 cut-off events. [2023-08-26 12:19:41,367 INFO L125 PetriNetUnfolderBase]: For 1365/1365 co-relation queries the response was YES. [2023-08-26 12:19:41,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1262 conditions, 240 events. 119/240 cut-off events. For 1365/1365 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 773 event pairs, 37 based on Foata normal form. 1/241 useless extension candidates. Maximal degree in co-relation 1238. Up to 110 conditions per place. [2023-08-26 12:19:41,368 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 0 selfloop transitions, 0 changer transitions 49/49 dead transitions. [2023-08-26 12:19:41,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 49 transitions, 474 flow [2023-08-26 12:19:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:19:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:19:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 599 transitions. [2023-08-26 12:19:41,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108367626886145 [2023-08-26 12:19:41,370 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 599 transitions. [2023-08-26 12:19:41,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 599 transitions. [2023-08-26 12:19:41,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:41,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 599 transitions. [2023-08-26 12:19:41,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.83333333333333) internal successors, (599), 6 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:41,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:41,373 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:41,374 INFO L175 Difference]: Start difference. First operand has 82 places, 34 transitions, 258 flow. Second operand 6 states and 599 transitions. [2023-08-26 12:19:41,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 49 transitions, 474 flow [2023-08-26 12:19:41,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 371 flow, removed 20 selfloop flow, removed 26 redundant places. [2023-08-26 12:19:41,377 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-26 12:19:41,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-08-26 12:19:41,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-26 12:19:41,377 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-26 12:19:41,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.875) internal successors, (775), 8 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:41,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONASSERT (11 of 12 remaining) [2023-08-26 12:19:41,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-08-26 12:19:41,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-08-26 12:19:41,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-26 12:19:41,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-08-26 12:19:41,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-08-26 12:19:41,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-08-26 12:19:41,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (4 of 12 remaining) [2023-08-26 12:19:41,381 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 12 remaining) [2023-08-26 12:19:41,382 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 12 remaining) [2023-08-26 12:19:41,382 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-08-26 12:19:41,382 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONASSERT (0 of 12 remaining) [2023-08-26 12:19:41,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 12:19:41,382 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 3, 2, 1, 1, 1, 1] [2023-08-26 12:19:41,387 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:19:41,387 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:19:41,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:19:41 BasicIcfg [2023-08-26 12:19:41,390 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:19:41,390 INFO L158 Benchmark]: Toolchain (without parser) took 34237.59ms. Allocated memory was 354.4MB in the beginning and 1.3GB in the end (delta: 992.0MB). Free memory was 329.1MB in the beginning and 1.1GB in the end (delta: -759.3MB). Peak memory consumption was 234.6MB. Max. memory is 16.0GB. [2023-08-26 12:19:41,391 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 354.4MB. Free memory was 331.5MB in the beginning and 331.3MB in the end (delta: 125.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:19:41,391 INFO L158 Benchmark]: CACSL2BoogieTranslator took 576.52ms. Allocated memory is still 354.4MB. Free memory was 328.6MB in the beginning and 301.6MB in the end (delta: 26.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 12:19:41,391 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.91ms. Allocated memory is still 354.4MB. Free memory was 301.0MB in the beginning and 297.4MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 12:19:41,391 INFO L158 Benchmark]: Boogie Preprocessor took 62.80ms. Allocated memory is still 354.4MB. Free memory was 297.4MB in the beginning and 295.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:19:41,391 INFO L158 Benchmark]: RCFGBuilder took 809.17ms. Allocated memory was 354.4MB in the beginning and 444.6MB in the end (delta: 90.2MB). Free memory was 294.8MB in the beginning and 404.5MB in the end (delta: -109.7MB). Peak memory consumption was 60.8MB. Max. memory is 16.0GB. [2023-08-26 12:19:41,392 INFO L158 Benchmark]: TraceAbstraction took 32697.73ms. Allocated memory was 444.6MB in the beginning and 1.3GB in the end (delta: 901.8MB). Free memory was 404.5MB in the beginning and 1.1GB in the end (delta: -684.0MB). Peak memory consumption was 217.8MB. Max. memory is 16.0GB. [2023-08-26 12:19:41,393 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 354.4MB. Free memory was 331.5MB in the beginning and 331.3MB in the end (delta: 125.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 576.52ms. Allocated memory is still 354.4MB. Free memory was 328.6MB in the beginning and 301.6MB in the end (delta: 26.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 84.91ms. Allocated memory is still 354.4MB. Free memory was 301.0MB in the beginning and 297.4MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 62.80ms. Allocated memory is still 354.4MB. Free memory was 297.4MB in the beginning and 295.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 809.17ms. Allocated memory was 354.4MB in the beginning and 444.6MB in the end (delta: 90.2MB). Free memory was 294.8MB in the beginning and 404.5MB in the end (delta: -109.7MB). Peak memory consumption was 60.8MB. Max. memory is 16.0GB. * TraceAbstraction took 32697.73ms. Allocated memory was 444.6MB in the beginning and 1.3GB in the end (delta: 901.8MB). Free memory was 404.5MB in the beginning and 1.1GB in the end (delta: -684.0MB). Peak memory consumption was 217.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 126 PlacesBefore, 42 PlacesAfterwards, 119 TransitionsBefore, 32 TransitionsAfterwards, 2498 CoEnabledTransitionPairs, 7 FixpointIterations, 47 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 121 TotalNumberOfCompositions, 7961 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2400, independent: 2174, independent conditional: 0, independent unconditional: 2174, dependent: 226, dependent conditional: 0, dependent unconditional: 226, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1292, independent: 1243, independent conditional: 0, independent unconditional: 1243, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2400, independent: 931, independent conditional: 0, independent unconditional: 931, dependent: 177, dependent conditional: 0, dependent unconditional: 177, unknown: 1292, unknown conditional: 0, unknown unconditional: 1292] , Statistics on independence cache: Total cache size (in pairs): 76, Positive cache size: 59, Positive conditional cache size: 0, Positive unconditional cache size: 59, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds 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: -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: 17]: 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 7 procedures, 151 locations, 12 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: 32.6s, OverallIterations: 18, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 649 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 649 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 305 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2880 IncrementalHoareTripleChecker+Invalid, 3185 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 305 mSolverCounterUnsat, 1 mSDtfsCounter, 2880 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2769occurred in iteration=9, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 263 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 2650 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 0/0 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 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:19:41,410 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...