/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 --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -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/weaver/popl20-figure1-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:58:54,742 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:58:54,789 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 16:58:54,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:58:54,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:58:54,820 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:58:54,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:58:54,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:58:54,822 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:58:54,822 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:58:54,822 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:58:54,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:58:54,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:58:54,823 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:58:54,823 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:58:54,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:58:54,824 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:58:54,824 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:58:54,825 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:58:54,825 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:58:54,825 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:58:54,826 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:58:54,826 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:58:54,826 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:58:54,827 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:58:54,827 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:58:54,827 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:58:54,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:58:54,828 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:58:54,828 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:58:54,829 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:58:54,829 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:58:54,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:58:54,829 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:58:54,830 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:58:54,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:58:55,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:58:55,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:58:55,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:58:55,182 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:58:55,182 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:58:55,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-26 16:58:56,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:58:56,618 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:58:56,619 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-26 16:58:56,630 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74fdd4e18/ddec3b5e622b4359929417d20aed814d/FLAGe3f91aa9e [2023-08-26 16:58:56,645 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74fdd4e18/ddec3b5e622b4359929417d20aed814d [2023-08-26 16:58:56,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:58:56,654 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:58:56,656 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:58:56,657 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:58:56,660 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:58:56,661 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3ec32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56, skipping insertion in model container [2023-08-26 16:58:56,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,682 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:58:56,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:58:56,816 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:58:56,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:58:56,839 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 16:58:56,839 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 16:58:56,845 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:58:56,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56 WrapperNode [2023-08-26 16:58:56,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:58:56,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:58:56,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:58:56,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:58:56,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,858 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,874 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 81 [2023-08-26 16:58:56,874 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:58:56,875 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:58:56,875 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:58:56,875 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:58:56,882 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,884 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,888 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,892 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,893 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:58:56,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:58:56,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:58:56,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:58:56,901 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (1/1) ... [2023-08-26 16:58:56,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:58:56,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:58:56,923 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 16:58:56,938 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 16:58:56,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:58:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 16:58:56,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 16:58:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 16:58:56,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 16:58:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:58:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:58:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:58:56,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 16:58:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 16:58:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:58:56,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:58:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 16:58:56,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:58:56,969 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 16:58:57,047 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:58:57,048 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:58:57,307 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:58:57,349 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:58:57,349 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 16:58:57,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:58:57 BoogieIcfgContainer [2023-08-26 16:58:57,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:58:57,357 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:58:57,357 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:58:57,360 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:58:57,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:58:56" (1/3) ... [2023-08-26 16:58:57,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65eb1742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:58:57, skipping insertion in model container [2023-08-26 16:58:57,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:58:56" (2/3) ... [2023-08-26 16:58:57,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65eb1742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:58:57, skipping insertion in model container [2023-08-26 16:58:57,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:58:57" (3/3) ... [2023-08-26 16:58:57,365 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-08-26 16:58:57,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:58:57,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 16:58:57,381 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:58:57,460 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 16:58:57,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 206 flow [2023-08-26 16:58:57,567 INFO L124 PetriNetUnfolderBase]: 6/93 cut-off events. [2023-08-26 16:58:57,567 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:58:57,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 16:58:57,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 95 transitions, 206 flow [2023-08-26 16:58:57,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 84 transitions, 180 flow [2023-08-26 16:58:57,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:58:57,597 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 84 transitions, 180 flow [2023-08-26 16:58:57,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 84 transitions, 180 flow [2023-08-26 16:58:57,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 180 flow [2023-08-26 16:58:57,632 INFO L124 PetriNetUnfolderBase]: 6/84 cut-off events. [2023-08-26 16:58:57,632 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:58:57,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 16:58:57,634 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-26 16:59:00,364 INFO L134 LiptonReduction]: Checked pairs total: 769 [2023-08-26 16:59:00,364 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-26 16:59:00,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 16:59:00,380 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;@6e9ad8e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:59:00,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 16:59:00,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:59:00,381 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 16:59:00,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:59:00,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:00,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 16:59:00,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:00,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash 380, now seen corresponding path program 1 times [2023-08-26 16:59:00,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:00,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795526698] [2023-08-26 16:59:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:00,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:00,468 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 16:59:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:00,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795526698] [2023-08-26 16:59:00,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795526698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:00,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:00,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 16:59:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618413425] [2023-08-26 16:59:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:00,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 16:59:00,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 16:59:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 16:59:00,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 180 [2023-08-26 16:59:00,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:00,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 180 [2023-08-26 16:59:00,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:00,566 INFO L124 PetriNetUnfolderBase]: 106/169 cut-off events. [2023-08-26 16:59:00,566 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 16:59:00,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 106/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 555 event pairs, 45 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 277. Up to 167 conditions per place. [2023-08-26 16:59:00,569 INFO L140 encePairwiseOnDemand]: 178/180 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 16:59:00,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-26 16:59:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 16:59:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 16:59:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 189 transitions. [2023-08-26 16:59:00,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2023-08-26 16:59:00,581 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 189 transitions. [2023-08-26 16:59:00,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 189 transitions. [2023-08-26 16:59:00,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:00,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 189 transitions. [2023-08-26 16:59:00,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,592 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,594 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 2 states and 189 transitions. [2023-08-26 16:59:00,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-26 16:59:00,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 16:59:00,597 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-26 16:59:00,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-26 16:59:00,602 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 16:59:00,602 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-26 16:59:00,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:00,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:59:00,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:59:00,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:00,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 375616, now seen corresponding path program 1 times [2023-08-26 16:59:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:00,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480681277] [2023-08-26 16:59:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:00,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:00,775 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 16:59:00,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:00,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480681277] [2023-08-26 16:59:00,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480681277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:00,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:00,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:59:00,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418478183] [2023-08-26 16:59:00,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:00,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:59:00,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:59:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:59:00,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 180 [2023-08-26 16:59:00,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:00,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 180 [2023-08-26 16:59:00,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:00,824 INFO L124 PetriNetUnfolderBase]: 99/156 cut-off events. [2023-08-26 16:59:00,824 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:00,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 156 events. 99/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 494 event pairs, 42 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-08-26 16:59:00,826 INFO L140 encePairwiseOnDemand]: 177/180 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 16:59:00,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-26 16:59:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2023-08-26 16:59:00,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-08-26 16:59:00,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2023-08-26 16:59:00,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2023-08-26 16:59:00,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:00,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2023-08-26 16:59:00,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,836 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 220 transitions. [2023-08-26 16:59:00,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-26 16:59:00,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:59:00,837 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-26 16:59:00,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-26 16:59:00,838 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 16:59:00,838 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-26 16:59:00,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:00,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:59:00,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:59:00,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:00,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash 375618, now seen corresponding path program 1 times [2023-08-26 16:59:00,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:00,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548087553] [2023-08-26 16:59:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:00,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:00,913 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 16:59:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548087553] [2023-08-26 16:59:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548087553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:00,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:00,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:59:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35265780] [2023-08-26 16:59:00,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:00,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:59:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:59:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:59:00,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:00,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:00,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:00,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:00,960 INFO L124 PetriNetUnfolderBase]: 92/143 cut-off events. [2023-08-26 16:59:00,961 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:00,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 143 events. 92/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 433 event pairs, 39 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 288. Up to 140 conditions per place. [2023-08-26 16:59:00,962 INFO L140 encePairwiseOnDemand]: 177/180 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 16:59:00,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-26 16:59:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-26 16:59:00,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2023-08-26 16:59:00,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-26 16:59:00,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-26 16:59:00,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:00,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-26 16:59:00,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,972 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 212 transitions. [2023-08-26 16:59:00,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-26 16:59:00,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:00,974 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-26 16:59:00,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-26 16:59:00,975 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 16:59:00,975 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-26 16:59:00,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:00,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:00,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:59:00,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:59:00,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:00,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash 360976376, now seen corresponding path program 1 times [2023-08-26 16:59:00,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:00,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628541456] [2023-08-26 16:59:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:00,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:01,129 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 16:59:01,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628541456] [2023-08-26 16:59:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628541456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:01,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:01,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:59:01,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869465428] [2023-08-26 16:59:01,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:01,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:59:01,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:59:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:59:01,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 180 [2023-08-26 16:59:01,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:01,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 180 [2023-08-26 16:59:01,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:01,172 INFO L124 PetriNetUnfolderBase]: 70/112 cut-off events. [2023-08-26 16:59:01,172 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:01,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 112 events. 70/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 302 event pairs, 29 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 227. Up to 109 conditions per place. [2023-08-26 16:59:01,176 INFO L140 encePairwiseOnDemand]: 178/180 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 16:59:01,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-26 16:59:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-08-26 16:59:01,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2023-08-26 16:59:01,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-08-26 16:59:01,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-08-26 16:59:01,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:01,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-08-26 16:59:01,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,183 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 201 transitions. [2023-08-26 16:59:01,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-26 16:59:01,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:01,185 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-26 16:59:01,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-26 16:59:01,186 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 16:59:01,186 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-26 16:59:01,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:01,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:59:01,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 16:59:01,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:01,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 360976377, now seen corresponding path program 1 times [2023-08-26 16:59:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:01,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612430783] [2023-08-26 16:59:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:01,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:01,342 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 16:59:01,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:01,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612430783] [2023-08-26 16:59:01,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612430783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:01,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:01,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:59:01,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448853404] [2023-08-26 16:59:01,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:01,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:59:01,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:01,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:59:01,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:59:01,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 180 [2023-08-26 16:59:01,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:01,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 180 [2023-08-26 16:59:01,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:01,375 INFO L124 PetriNetUnfolderBase]: 48/81 cut-off events. [2023-08-26 16:59:01,376 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:01,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 48/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 183 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2023-08-26 16:59:01,381 INFO L140 encePairwiseOnDemand]: 178/180 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 16:59:01,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-26 16:59:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-08-26 16:59:01,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37592592592592594 [2023-08-26 16:59:01,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-08-26 16:59:01,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-08-26 16:59:01,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:01,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-08-26 16:59:01,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,386 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 203 transitions. [2023-08-26 16:59:01,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-26 16:59:01,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:01,386 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 16:59:01,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 16:59:01,388 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 16:59:01,389 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 16:59:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:01,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:01,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 16:59:01,389 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:01,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:01,390 INFO L85 PathProgramCache]: Analyzing trace with hash -110369619, now seen corresponding path program 1 times [2023-08-26 16:59:01,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:01,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701411271] [2023-08-26 16:59:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:01,753 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 16:59:01,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:01,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701411271] [2023-08-26 16:59:01,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701411271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:01,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:01,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:01,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522460977] [2023-08-26 16:59:01,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:01,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:59:01,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:59:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:59:01,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:01,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:01,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:01,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:01,850 INFO L124 PetriNetUnfolderBase]: 62/128 cut-off events. [2023-08-26 16:59:01,850 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:59:01,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 128 events. 62/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 2 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 266. Up to 61 conditions per place. [2023-08-26 16:59:01,851 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 29 selfloop transitions, 4 changer transitions 11/44 dead transitions. [2023-08-26 16:59:01,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 44 transitions, 193 flow [2023-08-26 16:59:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:59:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:59:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 504 transitions. [2023-08-26 16:59:01,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-26 16:59:01,853 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 504 transitions. [2023-08-26 16:59:01,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 504 transitions. [2023-08-26 16:59:01,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:01,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 504 transitions. [2023-08-26 16:59:01,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,857 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,857 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 7 states and 504 transitions. [2023-08-26 16:59:01,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 44 transitions, 193 flow [2023-08-26 16:59:01,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:01,858 INFO L231 Difference]: Finished difference. Result has 32 places, 17 transitions, 74 flow [2023-08-26 16:59:01,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=17} [2023-08-26 16:59:01,859 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2023-08-26 16:59:01,859 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 17 transitions, 74 flow [2023-08-26 16:59:01,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:01,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:01,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:01,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 16:59:01,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:01,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2597403, now seen corresponding path program 2 times [2023-08-26 16:59:01,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:01,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898322534] [2023-08-26 16:59:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:01,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:02,064 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 16:59:02,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:02,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898322534] [2023-08-26 16:59:02,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898322534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:02,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:02,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:02,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921091431] [2023-08-26 16:59:02,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:59:02,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:59:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:59:02,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:02,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 17 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:02,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:02,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:02,180 INFO L124 PetriNetUnfolderBase]: 58/122 cut-off events. [2023-08-26 16:59:02,180 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-26 16:59:02,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 122 events. 58/122 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 344 event pairs, 14 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 377. Up to 63 conditions per place. [2023-08-26 16:59:02,181 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 29 selfloop transitions, 8 changer transitions 8/45 dead transitions. [2023-08-26 16:59:02,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 262 flow [2023-08-26 16:59:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:59:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:59:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 501 transitions. [2023-08-26 16:59:02,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2023-08-26 16:59:02,183 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 501 transitions. [2023-08-26 16:59:02,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 501 transitions. [2023-08-26 16:59:02,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:02,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 501 transitions. [2023-08-26 16:59:02,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,187 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,187 INFO L175 Difference]: Start difference. First operand has 32 places, 17 transitions, 74 flow. Second operand 7 states and 501 transitions. [2023-08-26 16:59:02,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 262 flow [2023-08-26 16:59:02,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 235 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 16:59:02,190 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 116 flow [2023-08-26 16:59:02,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-26 16:59:02,191 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2023-08-26 16:59:02,191 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 116 flow [2023-08-26 16:59:02,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:02,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 16:59:02,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:02,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1975221591, now seen corresponding path program 3 times [2023-08-26 16:59:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234928760] [2023-08-26 16:59:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:02,432 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 16:59:02,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:02,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234928760] [2023-08-26 16:59:02,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234928760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:02,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:02,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:02,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101589060] [2023-08-26 16:59:02,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:02,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:59:02,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:02,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:59:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:59:02,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:02,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:02,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:02,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:02,513 INFO L124 PetriNetUnfolderBase]: 64/134 cut-off events. [2023-08-26 16:59:02,514 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-08-26 16:59:02,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 134 events. 64/134 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 410 event pairs, 14 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 453. Up to 65 conditions per place. [2023-08-26 16:59:02,515 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 28 selfloop transitions, 10 changer transitions 9/47 dead transitions. [2023-08-26 16:59:02,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 294 flow [2023-08-26 16:59:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:59:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:59:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 499 transitions. [2023-08-26 16:59:02,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396031746031746 [2023-08-26 16:59:02,517 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 499 transitions. [2023-08-26 16:59:02,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 499 transitions. [2023-08-26 16:59:02,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:02,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 499 transitions. [2023-08-26 16:59:02,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.28571428571429) internal successors, (499), 7 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,521 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,521 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 116 flow. Second operand 7 states and 499 transitions. [2023-08-26 16:59:02,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 294 flow [2023-08-26 16:59:02,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 284 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 16:59:02,524 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 168 flow [2023-08-26 16:59:02,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-08-26 16:59:02,525 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2023-08-26 16:59:02,525 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 168 flow [2023-08-26 16:59:02,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:02,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:02,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 16:59:02,526 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:02,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1885530561, now seen corresponding path program 4 times [2023-08-26 16:59:02,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:02,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989328360] [2023-08-26 16:59:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:02,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:02,739 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 16:59:02,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989328360] [2023-08-26 16:59:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989328360] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:02,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:02,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:02,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011594570] [2023-08-26 16:59:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:59:02,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:59:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:59:02,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:02,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:02,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:02,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:02,808 INFO L124 PetriNetUnfolderBase]: 59/125 cut-off events. [2023-08-26 16:59:02,808 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2023-08-26 16:59:02,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 125 events. 59/125 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 360 event pairs, 18 based on Foata normal form. 1/118 useless extension candidates. Maximal degree in co-relation 476. Up to 65 conditions per place. [2023-08-26 16:59:02,809 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 25 selfloop transitions, 12 changer transitions 9/46 dead transitions. [2023-08-26 16:59:02,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 340 flow [2023-08-26 16:59:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:59:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:59:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 497 transitions. [2023-08-26 16:59:02,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2023-08-26 16:59:02,811 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 497 transitions. [2023-08-26 16:59:02,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 497 transitions. [2023-08-26 16:59:02,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:02,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 497 transitions. [2023-08-26 16:59:02,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.0) internal successors, (497), 7 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,815 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,815 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 168 flow. Second operand 7 states and 497 transitions. [2023-08-26 16:59:02,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 340 flow [2023-08-26 16:59:02,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 320 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-26 16:59:02,818 INFO L231 Difference]: Finished difference. Result has 47 places, 28 transitions, 211 flow [2023-08-26 16:59:02,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=211, PETRI_PLACES=47, PETRI_TRANSITIONS=28} [2023-08-26 16:59:02,818 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2023-08-26 16:59:02,819 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 28 transitions, 211 flow [2023-08-26 16:59:02,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:02,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:02,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 16:59:02,819 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:02,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1893229071, now seen corresponding path program 5 times [2023-08-26 16:59:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:02,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14743401] [2023-08-26 16:59:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:02,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:02,993 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 16:59:02,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:02,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14743401] [2023-08-26 16:59:02,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14743401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:02,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:02,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:02,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131093484] [2023-08-26 16:59:02,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:02,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:59:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:02,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:59:02,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:59:02,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:02,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 28 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:02,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:02,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:02,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:03,073 INFO L124 PetriNetUnfolderBase]: 57/121 cut-off events. [2023-08-26 16:59:03,073 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2023-08-26 16:59:03,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 121 events. 57/121 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 344 event pairs, 14 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 490. Up to 67 conditions per place. [2023-08-26 16:59:03,074 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 28 selfloop transitions, 13 changer transitions 5/46 dead transitions. [2023-08-26 16:59:03,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 363 flow [2023-08-26 16:59:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:59:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:59:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 497 transitions. [2023-08-26 16:59:03,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2023-08-26 16:59:03,076 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 497 transitions. [2023-08-26 16:59:03,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 497 transitions. [2023-08-26 16:59:03,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:03,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 497 transitions. [2023-08-26 16:59:03,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.0) internal successors, (497), 7 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,079 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,080 INFO L175 Difference]: Start difference. First operand has 47 places, 28 transitions, 211 flow. Second operand 7 states and 497 transitions. [2023-08-26 16:59:03,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 363 flow [2023-08-26 16:59:03,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 329 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-26 16:59:03,082 INFO L231 Difference]: Finished difference. Result has 48 places, 29 transitions, 215 flow [2023-08-26 16:59:03,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=48, PETRI_TRANSITIONS=29} [2023-08-26 16:59:03,083 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2023-08-26 16:59:03,083 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 215 flow [2023-08-26 16:59:03,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:03,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:03,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 16:59:03,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:03,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:03,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1913236191, now seen corresponding path program 6 times [2023-08-26 16:59:03,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:03,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30433673] [2023-08-26 16:59:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:03,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:03,311 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 16:59:03,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:03,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30433673] [2023-08-26 16:59:03,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30433673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:03,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:03,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:03,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120913552] [2023-08-26 16:59:03,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:03,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:59:03,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:03,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:59:03,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:59:03,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:03,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 215 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:03,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:03,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:03,416 INFO L124 PetriNetUnfolderBase]: 56/114 cut-off events. [2023-08-26 16:59:03,416 INFO L125 PetriNetUnfolderBase]: For 299/299 co-relation queries the response was YES. [2023-08-26 16:59:03,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 114 events. 56/114 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 303 event pairs, 17 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 463. Up to 67 conditions per place. [2023-08-26 16:59:03,417 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 21 selfloop transitions, 13 changer transitions 8/42 dead transitions. [2023-08-26 16:59:03,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 341 flow [2023-08-26 16:59:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:59:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:59:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 493 transitions. [2023-08-26 16:59:03,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39126984126984127 [2023-08-26 16:59:03,419 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 493 transitions. [2023-08-26 16:59:03,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 493 transitions. [2023-08-26 16:59:03,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:03,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 493 transitions. [2023-08-26 16:59:03,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,423 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,423 INFO L175 Difference]: Start difference. First operand has 48 places, 29 transitions, 215 flow. Second operand 7 states and 493 transitions. [2023-08-26 16:59:03,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 341 flow [2023-08-26 16:59:03,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 296 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-26 16:59:03,426 INFO L231 Difference]: Finished difference. Result has 48 places, 28 transitions, 192 flow [2023-08-26 16:59:03,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=48, PETRI_TRANSITIONS=28} [2023-08-26 16:59:03,426 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2023-08-26 16:59:03,426 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 28 transitions, 192 flow [2023-08-26 16:59:03,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:03,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:03,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 16:59:03,427 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:03,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1072574913, now seen corresponding path program 1 times [2023-08-26 16:59:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:03,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874101485] [2023-08-26 16:59:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:03,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:03,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:03,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874101485] [2023-08-26 16:59:03,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874101485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:03,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186326763] [2023-08-26 16:59:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:03,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:03,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:03,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:03,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 16:59:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:03,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:03,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:03,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:04,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186326763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:04,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:04,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 16:59:04,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767870991] [2023-08-26 16:59:04,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:04,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:59:04,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:04,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:59:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:59:04,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:04,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 28 transitions, 192 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:04,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:04,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:04,616 INFO L124 PetriNetUnfolderBase]: 138/285 cut-off events. [2023-08-26 16:59:04,616 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-26 16:59:04,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 285 events. 138/285 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1152 event pairs, 10 based on Foata normal form. 12/269 useless extension candidates. Maximal degree in co-relation 913. Up to 101 conditions per place. [2023-08-26 16:59:04,618 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 72 selfloop transitions, 26 changer transitions 10/108 dead transitions. [2023-08-26 16:59:04,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 108 transitions, 674 flow [2023-08-26 16:59:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 16:59:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 16:59:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1143 transitions. [2023-08-26 16:59:04,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2023-08-26 16:59:04,622 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1143 transitions. [2023-08-26 16:59:04,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1143 transitions. [2023-08-26 16:59:04,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:04,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1143 transitions. [2023-08-26 16:59:04,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 71.4375) internal successors, (1143), 16 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 180.0) internal successors, (3060), 17 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,629 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 180.0) internal successors, (3060), 17 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,630 INFO L175 Difference]: Start difference. First operand has 48 places, 28 transitions, 192 flow. Second operand 16 states and 1143 transitions. [2023-08-26 16:59:04,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 108 transitions, 674 flow [2023-08-26 16:59:04,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 108 transitions, 621 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-26 16:59:04,633 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 332 flow [2023-08-26 16:59:04,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=332, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-26 16:59:04,634 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 33 predicate places. [2023-08-26 16:59:04,634 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 332 flow [2023-08-26 16:59:04,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:04,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:04,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 16:59:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 16:59:04,841 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:04,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2014836671, now seen corresponding path program 2 times [2023-08-26 16:59:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:04,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278059793] [2023-08-26 16:59:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:04,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:05,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:05,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278059793] [2023-08-26 16:59:05,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278059793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:05,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805378678] [2023-08-26 16:59:05,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:05,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:05,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:05,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:05,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 16:59:05,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:05,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:05,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:05,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:05,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:05,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805378678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:05,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:05,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 16:59:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924419466] [2023-08-26 16:59:05,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:05,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:59:05,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:05,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:59:05,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:59:05,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:05,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 332 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:05,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:05,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:06,341 INFO L124 PetriNetUnfolderBase]: 189/407 cut-off events. [2023-08-26 16:59:06,341 INFO L125 PetriNetUnfolderBase]: For 848/848 co-relation queries the response was YES. [2023-08-26 16:59:06,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 407 events. 189/407 cut-off events. For 848/848 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1931 event pairs, 18 based on Foata normal form. 3/410 useless extension candidates. Maximal degree in co-relation 1647. Up to 151 conditions per place. [2023-08-26 16:59:06,345 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 88 selfloop transitions, 51 changer transitions 16/155 dead transitions. [2023-08-26 16:59:06,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 155 transitions, 1136 flow [2023-08-26 16:59:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 16:59:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 16:59:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1900 transitions. [2023-08-26 16:59:06,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39094650205761317 [2023-08-26 16:59:06,350 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1900 transitions. [2023-08-26 16:59:06,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1900 transitions. [2023-08-26 16:59:06,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:06,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1900 transitions. [2023-08-26 16:59:06,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 70.37037037037037) internal successors, (1900), 27 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 180.0) internal successors, (5040), 28 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,362 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 180.0) internal successors, (5040), 28 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,362 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 332 flow. Second operand 27 states and 1900 transitions. [2023-08-26 16:59:06,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 155 transitions, 1136 flow [2023-08-26 16:59:06,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 155 transitions, 997 flow, removed 63 selfloop flow, removed 4 redundant places. [2023-08-26 16:59:06,368 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 574 flow [2023-08-26 16:59:06,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=574, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2023-08-26 16:59:06,369 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2023-08-26 16:59:06,369 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 574 flow [2023-08-26 16:59:06,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:06,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:06,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 16:59:06,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-26 16:59:06,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:06,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1932844151, now seen corresponding path program 3 times [2023-08-26 16:59:06,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:06,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938585210] [2023-08-26 16:59:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:06,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:06,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:06,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938585210] [2023-08-26 16:59:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938585210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:06,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785833638] [2023-08-26 16:59:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:06,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:06,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:06,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:06,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 16:59:06,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:59:06,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:06,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:06,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:07,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:07,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785833638] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:07,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:07,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 16:59:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082359329] [2023-08-26 16:59:07,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:07,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:59:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:59:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:59:07,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:07,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 574 flow. Second operand has 19 states, 19 states have (on average 67.10526315789474) internal successors, (1275), 19 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:07,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:07,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:08,010 INFO L124 PetriNetUnfolderBase]: 187/397 cut-off events. [2023-08-26 16:59:08,010 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2023-08-26 16:59:08,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1653 conditions, 397 events. 187/397 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1854 event pairs, 18 based on Foata normal form. 5/402 useless extension candidates. Maximal degree in co-relation 1631. Up to 127 conditions per place. [2023-08-26 16:59:08,014 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 70 selfloop transitions, 44 changer transitions 33/147 dead transitions. [2023-08-26 16:59:08,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 147 transitions, 1094 flow [2023-08-26 16:59:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 16:59:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 16:59:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1695 transitions. [2023-08-26 16:59:08,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923611111111111 [2023-08-26 16:59:08,018 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1695 transitions. [2023-08-26 16:59:08,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1695 transitions. [2023-08-26 16:59:08,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:08,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1695 transitions. [2023-08-26 16:59:08,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 70.625) internal successors, (1695), 24 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,028 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,029 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 574 flow. Second operand 24 states and 1695 transitions. [2023-08-26 16:59:08,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 147 transitions, 1094 flow [2023-08-26 16:59:08,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 147 transitions, 942 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-08-26 16:59:08,040 INFO L231 Difference]: Finished difference. Result has 103 places, 70 transitions, 537 flow [2023-08-26 16:59:08,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=537, PETRI_PLACES=103, PETRI_TRANSITIONS=70} [2023-08-26 16:59:08,040 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2023-08-26 16:59:08,040 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 70 transitions, 537 flow [2023-08-26 16:59:08,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.10526315789474) internal successors, (1275), 19 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:08,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:08,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:08,247 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:08,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash -281708653, now seen corresponding path program 4 times [2023-08-26 16:59:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:08,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684115229] [2023-08-26 16:59:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:08,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684115229] [2023-08-26 16:59:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684115229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958466395] [2023-08-26 16:59:08,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:08,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:08,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:08,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:08,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 16:59:08,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:08,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:08,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:08,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:08,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:08,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958466395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:08,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:08,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 16:59:08,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998641425] [2023-08-26 16:59:08,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:08,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:59:08,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:59:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:59:08,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:08,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 70 transitions, 537 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:08,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:08,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:09,110 INFO L124 PetriNetUnfolderBase]: 171/358 cut-off events. [2023-08-26 16:59:09,111 INFO L125 PetriNetUnfolderBase]: For 711/711 co-relation queries the response was YES. [2023-08-26 16:59:09,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 358 events. 171/358 cut-off events. For 711/711 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1550 event pairs, 34 based on Foata normal form. 2/358 useless extension candidates. Maximal degree in co-relation 1465. Up to 274 conditions per place. [2023-08-26 16:59:09,114 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 59 selfloop transitions, 28 changer transitions 10/97 dead transitions. [2023-08-26 16:59:09,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 97 transitions, 817 flow [2023-08-26 16:59:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 16:59:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 16:59:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 907 transitions. [2023-08-26 16:59:09,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876068376068376 [2023-08-26 16:59:09,116 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 907 transitions. [2023-08-26 16:59:09,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 907 transitions. [2023-08-26 16:59:09,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:09,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 907 transitions. [2023-08-26 16:59:09,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 69.76923076923077) internal successors, (907), 13 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 180.0) internal successors, (2520), 14 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,123 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 180.0) internal successors, (2520), 14 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,123 INFO L175 Difference]: Start difference. First operand has 103 places, 70 transitions, 537 flow. Second operand 13 states and 907 transitions. [2023-08-26 16:59:09,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 97 transitions, 817 flow [2023-08-26 16:59:09,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 97 transitions, 716 flow, removed 9 selfloop flow, removed 21 redundant places. [2023-08-26 16:59:09,128 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 522 flow [2023-08-26 16:59:09,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=522, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2023-08-26 16:59:09,129 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2023-08-26 16:59:09,129 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 522 flow [2023-08-26 16:59:09,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:09,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:09,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:09,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 16:59:09,335 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:09,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1037833293, now seen corresponding path program 5 times [2023-08-26 16:59:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:09,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047006024] [2023-08-26 16:59:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:09,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:09,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:09,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047006024] [2023-08-26 16:59:09,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047006024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:09,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55046226] [2023-08-26 16:59:09,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:09,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:09,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:09,525 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:09,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 16:59:09,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:09,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:09,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:09,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:09,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:09,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55046226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:09,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:09,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 16:59:09,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786309331] [2023-08-26 16:59:09,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:09,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:59:09,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:59:09,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:59:09,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:09,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 522 flow. Second operand has 19 states, 19 states have (on average 66.94736842105263) internal successors, (1272), 19 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:09,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:09,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:10,369 INFO L124 PetriNetUnfolderBase]: 199/440 cut-off events. [2023-08-26 16:59:10,369 INFO L125 PetriNetUnfolderBase]: For 781/781 co-relation queries the response was YES. [2023-08-26 16:59:10,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 440 events. 199/440 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2156 event pairs, 43 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 1691. Up to 296 conditions per place. [2023-08-26 16:59:10,372 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 95 selfloop transitions, 29 changer transitions 10/134 dead transitions. [2023-08-26 16:59:10,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1056 flow [2023-08-26 16:59:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 16:59:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 16:59:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1260 transitions. [2023-08-26 16:59:10,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-26 16:59:10,375 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1260 transitions. [2023-08-26 16:59:10,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1260 transitions. [2023-08-26 16:59:10,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:10,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1260 transitions. [2023-08-26 16:59:10,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 70.0) internal successors, (1260), 18 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,382 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,382 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 522 flow. Second operand 18 states and 1260 transitions. [2023-08-26 16:59:10,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1056 flow [2023-08-26 16:59:10,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 134 transitions, 979 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-26 16:59:10,388 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 643 flow [2023-08-26 16:59:10,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=643, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2023-08-26 16:59:10,389 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 73 predicate places. [2023-08-26 16:59:10,389 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 643 flow [2023-08-26 16:59:10,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.94736842105263) internal successors, (1272), 19 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:10,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:10,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 16:59:10,595 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:10,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash -993294209, now seen corresponding path program 6 times [2023-08-26 16:59:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010284899] [2023-08-26 16:59:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:10,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010284899] [2023-08-26 16:59:10,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010284899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:10,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688418398] [2023-08-26 16:59:10,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:10,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:10,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:10,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 16:59:10,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 16:59:10,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:10,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:10,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:11,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688418398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:11,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:11,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 16:59:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444107842] [2023-08-26 16:59:11,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:11,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:59:11,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:59:11,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:59:11,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:11,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 643 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:11,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:11,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:11,377 INFO L124 PetriNetUnfolderBase]: 201/446 cut-off events. [2023-08-26 16:59:11,377 INFO L125 PetriNetUnfolderBase]: For 910/910 co-relation queries the response was YES. [2023-08-26 16:59:11,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 446 events. 201/446 cut-off events. For 910/910 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2199 event pairs, 47 based on Foata normal form. 2/446 useless extension candidates. Maximal degree in co-relation 1817. Up to 396 conditions per place. [2023-08-26 16:59:11,381 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 78 selfloop transitions, 15 changer transitions 10/103 dead transitions. [2023-08-26 16:59:11,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 929 flow [2023-08-26 16:59:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 16:59:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 16:59:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 695 transitions. [2023-08-26 16:59:11,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2023-08-26 16:59:11,383 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 695 transitions. [2023-08-26 16:59:11,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 695 transitions. [2023-08-26 16:59:11,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:11,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 695 transitions. [2023-08-26 16:59:11,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 69.5) internal successors, (695), 10 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 180.0) internal successors, (1980), 11 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,387 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 180.0) internal successors, (1980), 11 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,387 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 643 flow. Second operand 10 states and 695 transitions. [2023-08-26 16:59:11,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 929 flow [2023-08-26 16:59:11,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 896 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-26 16:59:11,393 INFO L231 Difference]: Finished difference. Result has 105 places, 85 transitions, 674 flow [2023-08-26 16:59:11,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=674, PETRI_PLACES=105, PETRI_TRANSITIONS=85} [2023-08-26 16:59:11,394 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 77 predicate places. [2023-08-26 16:59:11,394 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 85 transitions, 674 flow [2023-08-26 16:59:11,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:11,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:11,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-26 16:59:11,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 16:59:11,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:11,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash -679915767, now seen corresponding path program 7 times [2023-08-26 16:59:11,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:11,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518862415] [2023-08-26 16:59:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:11,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:11,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518862415] [2023-08-26 16:59:11,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518862415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:11,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147825127] [2023-08-26 16:59:11,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:59:11,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:11,792 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:11,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 16:59:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:11,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:11,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:11,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147825127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:12,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-26 16:59:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970708651] [2023-08-26 16:59:12,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:12,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:59:12,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:59:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:59:12,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:12,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 85 transitions, 674 flow. Second operand has 18 states, 18 states have (on average 67.05555555555556) internal successors, (1207), 18 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:12,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:12,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:12,356 INFO L124 PetriNetUnfolderBase]: 201/441 cut-off events. [2023-08-26 16:59:12,357 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2023-08-26 16:59:12,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 441 events. 201/441 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2154 event pairs, 47 based on Foata normal form. 3/442 useless extension candidates. Maximal degree in co-relation 1835. Up to 376 conditions per place. [2023-08-26 16:59:12,360 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 76 selfloop transitions, 22 changer transitions 10/108 dead transitions. [2023-08-26 16:59:12,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 108 transitions, 974 flow [2023-08-26 16:59:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:59:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:59:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 967 transitions. [2023-08-26 16:59:12,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38373015873015875 [2023-08-26 16:59:12,362 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 967 transitions. [2023-08-26 16:59:12,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 967 transitions. [2023-08-26 16:59:12,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:12,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 967 transitions. [2023-08-26 16:59:12,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 180.0) internal successors, (2700), 15 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,367 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 180.0) internal successors, (2700), 15 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,367 INFO L175 Difference]: Start difference. First operand has 105 places, 85 transitions, 674 flow. Second operand 14 states and 967 transitions. [2023-08-26 16:59:12,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 108 transitions, 974 flow [2023-08-26 16:59:12,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 108 transitions, 924 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-26 16:59:12,374 INFO L231 Difference]: Finished difference. Result has 111 places, 86 transitions, 695 flow [2023-08-26 16:59:12,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=695, PETRI_PLACES=111, PETRI_TRANSITIONS=86} [2023-08-26 16:59:12,375 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 83 predicate places. [2023-08-26 16:59:12,375 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 86 transitions, 695 flow [2023-08-26 16:59:12,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.05555555555556) internal successors, (1207), 18 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:12,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:12,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-26 16:59:12,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:12,581 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:12,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash 957397593, now seen corresponding path program 8 times [2023-08-26 16:59:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:12,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279214442] [2023-08-26 16:59:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:12,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:12,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279214442] [2023-08-26 16:59:12,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279214442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951470929] [2023-08-26 16:59:12,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:12,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:12,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:12,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:12,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 16:59:12,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:12,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:12,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:12,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:13,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:13,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951470929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:13,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:13,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 16:59:13,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393816964] [2023-08-26 16:59:13,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:13,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:59:13,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:59:13,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:59:13,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:13,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 86 transitions, 695 flow. Second operand has 19 states, 19 states have (on average 67.05263157894737) internal successors, (1274), 19 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:13,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:13,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:13,805 INFO L124 PetriNetUnfolderBase]: 197/424 cut-off events. [2023-08-26 16:59:13,805 INFO L125 PetriNetUnfolderBase]: For 1081/1081 co-relation queries the response was YES. [2023-08-26 16:59:13,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 424 events. 197/424 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2040 event pairs, 35 based on Foata normal form. 4/426 useless extension candidates. Maximal degree in co-relation 1784. Up to 304 conditions per place. [2023-08-26 16:59:13,809 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 76 selfloop transitions, 29 changer transitions 21/126 dead transitions. [2023-08-26 16:59:13,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 126 transitions, 1075 flow [2023-08-26 16:59:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:59:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:59:13,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1316 transitions. [2023-08-26 16:59:13,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847953216374269 [2023-08-26 16:59:13,811 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1316 transitions. [2023-08-26 16:59:13,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1316 transitions. [2023-08-26 16:59:13,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:13,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1316 transitions. [2023-08-26 16:59:13,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 69.26315789473684) internal successors, (1316), 19 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,818 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,818 INFO L175 Difference]: Start difference. First operand has 111 places, 86 transitions, 695 flow. Second operand 19 states and 1316 transitions. [2023-08-26 16:59:13,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 126 transitions, 1075 flow [2023-08-26 16:59:13,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 126 transitions, 1027 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-26 16:59:13,827 INFO L231 Difference]: Finished difference. Result has 119 places, 85 transitions, 745 flow [2023-08-26 16:59:13,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=745, PETRI_PLACES=119, PETRI_TRANSITIONS=85} [2023-08-26 16:59:13,828 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 91 predicate places. [2023-08-26 16:59:13,828 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 85 transitions, 745 flow [2023-08-26 16:59:13,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.05263157894737) internal successors, (1274), 19 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:13,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:13,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:14,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:14,034 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:14,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:14,034 INFO L85 PathProgramCache]: Analyzing trace with hash -300812834, now seen corresponding path program 1 times [2023-08-26 16:59:14,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:14,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101150013] [2023-08-26 16:59:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:14,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:14,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:14,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101150013] [2023-08-26 16:59:14,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101150013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:14,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126719495] [2023-08-26 16:59:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:14,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:14,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:14,183 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:14,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 16:59:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:14,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:14,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:14,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:14,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126719495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:14,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:14,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 16:59:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851410284] [2023-08-26 16:59:14,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:14,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:59:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:59:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:59:14,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:14,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 85 transitions, 745 flow. Second operand has 18 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:14,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:14,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:14,861 INFO L124 PetriNetUnfolderBase]: 216/450 cut-off events. [2023-08-26 16:59:14,861 INFO L125 PetriNetUnfolderBase]: For 1381/1381 co-relation queries the response was YES. [2023-08-26 16:59:14,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 450 events. 216/450 cut-off events. For 1381/1381 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2127 event pairs, 22 based on Foata normal form. 3/451 useless extension candidates. Maximal degree in co-relation 1982. Up to 103 conditions per place. [2023-08-26 16:59:14,865 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 75 selfloop transitions, 43 changer transitions 29/147 dead transitions. [2023-08-26 16:59:14,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 147 transitions, 1273 flow [2023-08-26 16:59:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:59:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:59:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1000 transitions. [2023-08-26 16:59:14,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2023-08-26 16:59:14,867 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1000 transitions. [2023-08-26 16:59:14,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1000 transitions. [2023-08-26 16:59:14,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:14,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1000 transitions. [2023-08-26 16:59:14,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.42857142857143) internal successors, (1000), 14 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 180.0) internal successors, (2700), 15 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,872 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 180.0) internal successors, (2700), 15 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,872 INFO L175 Difference]: Start difference. First operand has 119 places, 85 transitions, 745 flow. Second operand 14 states and 1000 transitions. [2023-08-26 16:59:14,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 147 transitions, 1273 flow [2023-08-26 16:59:14,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 147 transitions, 1182 flow, removed 23 selfloop flow, removed 12 redundant places. [2023-08-26 16:59:14,881 INFO L231 Difference]: Finished difference. Result has 120 places, 85 transitions, 793 flow [2023-08-26 16:59:14,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=793, PETRI_PLACES=120, PETRI_TRANSITIONS=85} [2023-08-26 16:59:14,882 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 92 predicate places. [2023-08-26 16:59:14,882 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 85 transitions, 793 flow [2023-08-26 16:59:14,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:14,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:14,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-26 16:59:15,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:15,088 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:15,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:15,088 INFO L85 PathProgramCache]: Analyzing trace with hash -870334123, now seen corresponding path program 9 times [2023-08-26 16:59:15,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:15,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838234187] [2023-08-26 16:59:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:15,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838234187] [2023-08-26 16:59:15,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838234187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723269231] [2023-08-26 16:59:15,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:15,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:15,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:15,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:15,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 16:59:15,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:59:15,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:15,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 16:59:15,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:15,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:15,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723269231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:15,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:15,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-26 16:59:15,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349741551] [2023-08-26 16:59:15,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:15,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:59:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:59:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-26 16:59:15,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 85 transitions, 793 flow. Second operand has 22 states, 22 states have (on average 66.86363636363636) internal successors, (1471), 22 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:15,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:15,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:15,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:17,313 INFO L124 PetriNetUnfolderBase]: 312/669 cut-off events. [2023-08-26 16:59:17,313 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-26 16:59:17,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3215 conditions, 669 events. 312/669 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3609 event pairs, 18 based on Foata normal form. 6/675 useless extension candidates. Maximal degree in co-relation 3171. Up to 271 conditions per place. [2023-08-26 16:59:17,317 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 131 selfloop transitions, 88 changer transitions 25/244 dead transitions. [2023-08-26 16:59:17,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 244 transitions, 2238 flow [2023-08-26 16:59:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 16:59:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 16:59:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2857 transitions. [2023-08-26 16:59:17,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871273712737127 [2023-08-26 16:59:17,322 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2857 transitions. [2023-08-26 16:59:17,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2857 transitions. [2023-08-26 16:59:17,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:17,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2857 transitions. [2023-08-26 16:59:17,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 69.6829268292683) internal successors, (2857), 41 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 180.0) internal successors, (7560), 42 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,334 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 180.0) internal successors, (7560), 42 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,335 INFO L175 Difference]: Start difference. First operand has 120 places, 85 transitions, 793 flow. Second operand 41 states and 2857 transitions. [2023-08-26 16:59:17,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 244 transitions, 2238 flow [2023-08-26 16:59:17,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 244 transitions, 2032 flow, removed 75 selfloop flow, removed 14 redundant places. [2023-08-26 16:59:17,349 INFO L231 Difference]: Finished difference. Result has 145 places, 141 transitions, 1421 flow [2023-08-26 16:59:17,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1421, PETRI_PLACES=145, PETRI_TRANSITIONS=141} [2023-08-26 16:59:17,349 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 117 predicate places. [2023-08-26 16:59:17,349 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 141 transitions, 1421 flow [2023-08-26 16:59:17,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.86363636363636) internal successors, (1471), 22 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:17,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:17,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:17,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-26 16:59:17,555 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:17,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash 965231828, now seen corresponding path program 2 times [2023-08-26 16:59:17,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:17,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848913155] [2023-08-26 16:59:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:17,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:17,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:17,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848913155] [2023-08-26 16:59:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848913155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:17,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628035844] [2023-08-26 16:59:17,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:17,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:17,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:17,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:17,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 16:59:17,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:17,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:17,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:17,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:17,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:18,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628035844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:18,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:18,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 16:59:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344592650] [2023-08-26 16:59:18,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:18,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:59:18,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:59:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:59:18,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:18,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 141 transitions, 1421 flow. Second operand has 18 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:18,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:18,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:18,569 INFO L124 PetriNetUnfolderBase]: 376/768 cut-off events. [2023-08-26 16:59:18,569 INFO L125 PetriNetUnfolderBase]: For 2755/2755 co-relation queries the response was YES. [2023-08-26 16:59:18,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3832 conditions, 768 events. 376/768 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4116 event pairs, 10 based on Foata normal form. 5/773 useless extension candidates. Maximal degree in co-relation 3790. Up to 224 conditions per place. [2023-08-26 16:59:18,577 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 129 selfloop transitions, 104 changer transitions 17/250 dead transitions. [2023-08-26 16:59:18,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 250 transitions, 2626 flow [2023-08-26 16:59:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 16:59:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 16:59:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1684 transitions. [2023-08-26 16:59:18,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38981481481481484 [2023-08-26 16:59:18,585 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1684 transitions. [2023-08-26 16:59:18,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1684 transitions. [2023-08-26 16:59:18,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:18,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1684 transitions. [2023-08-26 16:59:18,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 70.16666666666667) internal successors, (1684), 24 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,597 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,597 INFO L175 Difference]: Start difference. First operand has 145 places, 141 transitions, 1421 flow. Second operand 24 states and 1684 transitions. [2023-08-26 16:59:18,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 250 transitions, 2626 flow [2023-08-26 16:59:18,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 250 transitions, 2073 flow, removed 217 selfloop flow, removed 19 redundant places. [2023-08-26 16:59:18,620 INFO L231 Difference]: Finished difference. Result has 155 places, 174 transitions, 1634 flow [2023-08-26 16:59:18,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1634, PETRI_PLACES=155, PETRI_TRANSITIONS=174} [2023-08-26 16:59:18,620 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 127 predicate places. [2023-08-26 16:59:18,621 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 174 transitions, 1634 flow [2023-08-26 16:59:18,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:18,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:18,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:18,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 16:59:18,827 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:18,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash -952326643, now seen corresponding path program 10 times [2023-08-26 16:59:18,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:18,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117570641] [2023-08-26 16:59:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:18,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:18,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:18,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117570641] [2023-08-26 16:59:18,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117570641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:18,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608190982] [2023-08-26 16:59:18,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:18,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:19,001 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:19,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 16:59:19,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:19,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 16:59:19,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:19,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:19,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608190982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:19,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:19,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-26 16:59:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357927387] [2023-08-26 16:59:19,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:19,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:59:19,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:59:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-26 16:59:19,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:19,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 174 transitions, 1634 flow. Second operand has 22 states, 22 states have (on average 66.95454545454545) internal successors, (1473), 22 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:19,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:19,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:19,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:20,507 INFO L124 PetriNetUnfolderBase]: 360/718 cut-off events. [2023-08-26 16:59:20,508 INFO L125 PetriNetUnfolderBase]: For 2298/2298 co-relation queries the response was YES. [2023-08-26 16:59:20,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3562 conditions, 718 events. 360/718 cut-off events. For 2298/2298 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3681 event pairs, 22 based on Foata normal form. 5/721 useless extension candidates. Maximal degree in co-relation 3520. Up to 401 conditions per place. [2023-08-26 16:59:20,514 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 135 selfloop transitions, 85 changer transitions 21/241 dead transitions. [2023-08-26 16:59:20,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 241 transitions, 2300 flow [2023-08-26 16:59:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-26 16:59:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-26 16:59:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2235 transitions. [2023-08-26 16:59:20,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880208333333333 [2023-08-26 16:59:20,518 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2235 transitions. [2023-08-26 16:59:20,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2235 transitions. [2023-08-26 16:59:20,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:20,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2235 transitions. [2023-08-26 16:59:20,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 69.84375) internal successors, (2235), 32 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:20,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:20,527 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:20,528 INFO L175 Difference]: Start difference. First operand has 155 places, 174 transitions, 1634 flow. Second operand 32 states and 2235 transitions. [2023-08-26 16:59:20,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 241 transitions, 2300 flow [2023-08-26 16:59:20,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 241 transitions, 2074 flow, removed 83 selfloop flow, removed 11 redundant places. [2023-08-26 16:59:20,549 INFO L231 Difference]: Finished difference. Result has 170 places, 168 transitions, 1563 flow [2023-08-26 16:59:20,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1563, PETRI_PLACES=170, PETRI_TRANSITIONS=168} [2023-08-26 16:59:20,550 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 142 predicate places. [2023-08-26 16:59:20,550 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 168 transitions, 1563 flow [2023-08-26 16:59:20,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.95454545454545) internal successors, (1473), 22 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:20,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:20,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:20,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-26 16:59:20,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-26 16:59:20,755 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:20,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash -973866710, now seen corresponding path program 3 times [2023-08-26 16:59:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:20,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151215690] [2023-08-26 16:59:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151215690] [2023-08-26 16:59:20,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151215690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433770165] [2023-08-26 16:59:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:20,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:20,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 16:59:20,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:59:20,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:20,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:20,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:21,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433770165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:21,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:21,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 16:59:21,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917156238] [2023-08-26 16:59:21,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:21,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:59:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:59:21,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:59:21,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:21,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 168 transitions, 1563 flow. Second operand has 18 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:21,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:21,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:21,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:21,608 INFO L124 PetriNetUnfolderBase]: 345/673 cut-off events. [2023-08-26 16:59:21,609 INFO L125 PetriNetUnfolderBase]: For 1752/1752 co-relation queries the response was YES. [2023-08-26 16:59:21,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 673 events. 345/673 cut-off events. For 1752/1752 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3352 event pairs, 9 based on Foata normal form. 5/672 useless extension candidates. Maximal degree in co-relation 3259. Up to 217 conditions per place. [2023-08-26 16:59:21,615 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 107 selfloop transitions, 66 changer transitions 49/222 dead transitions. [2023-08-26 16:59:21,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 222 transitions, 2251 flow [2023-08-26 16:59:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:59:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:59:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1334 transitions. [2023-08-26 16:59:21,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900584795321637 [2023-08-26 16:59:21,617 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1334 transitions. [2023-08-26 16:59:21,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1334 transitions. [2023-08-26 16:59:21,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:21,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1334 transitions. [2023-08-26 16:59:21,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 70.21052631578948) internal successors, (1334), 19 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:21,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:21,623 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:21,623 INFO L175 Difference]: Start difference. First operand has 170 places, 168 transitions, 1563 flow. Second operand 19 states and 1334 transitions. [2023-08-26 16:59:21,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 222 transitions, 2251 flow [2023-08-26 16:59:21,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 222 transitions, 2061 flow, removed 19 selfloop flow, removed 27 redundant places. [2023-08-26 16:59:21,640 INFO L231 Difference]: Finished difference. Result has 157 places, 141 transitions, 1279 flow [2023-08-26 16:59:21,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1279, PETRI_PLACES=157, PETRI_TRANSITIONS=141} [2023-08-26 16:59:21,641 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2023-08-26 16:59:21,641 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 141 transitions, 1279 flow [2023-08-26 16:59:21,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.72222222222223) internal successors, (1201), 18 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:21,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:21,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:21,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:21,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-26 16:59:21,847 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:21,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash -157578334, now seen corresponding path program 4 times [2023-08-26 16:59:21,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:21,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077883504] [2023-08-26 16:59:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:21,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:21,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:21,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077883504] [2023-08-26 16:59:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077883504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769609943] [2023-08-26 16:59:21,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:21,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:21,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:22,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 16:59:22,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:22,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:22,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 16:59:22,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:22,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:22,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769609943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:22,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:22,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 16:59:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706937923] [2023-08-26 16:59:22,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:22,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:59:22,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:59:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:59:22,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:22,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 141 transitions, 1279 flow. Second operand has 18 states, 18 states have (on average 66.66666666666667) internal successors, (1200), 18 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:22,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:22,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:22,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:22,729 INFO L124 PetriNetUnfolderBase]: 283/562 cut-off events. [2023-08-26 16:59:22,729 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2023-08-26 16:59:22,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2795 conditions, 562 events. 283/562 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2653 event pairs, 13 based on Foata normal form. 2/558 useless extension candidates. Maximal degree in co-relation 2756. Up to 414 conditions per place. [2023-08-26 16:59:22,733 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 147 selfloop transitions, 36 changer transitions 14/197 dead transitions. [2023-08-26 16:59:22,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 197 transitions, 1975 flow [2023-08-26 16:59:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 16:59:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 16:59:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1388 transitions. [2023-08-26 16:59:22,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38555555555555554 [2023-08-26 16:59:22,735 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1388 transitions. [2023-08-26 16:59:22,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1388 transitions. [2023-08-26 16:59:22,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:22,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1388 transitions. [2023-08-26 16:59:22,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 69.4) internal successors, (1388), 20 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:22,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 180.0) internal successors, (3780), 21 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:22,740 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 180.0) internal successors, (3780), 21 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:22,740 INFO L175 Difference]: Start difference. First operand has 157 places, 141 transitions, 1279 flow. Second operand 20 states and 1388 transitions. [2023-08-26 16:59:22,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 197 transitions, 1975 flow [2023-08-26 16:59:22,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 197 transitions, 1775 flow, removed 27 selfloop flow, removed 18 redundant places. [2023-08-26 16:59:22,754 INFO L231 Difference]: Finished difference. Result has 146 places, 151 transitions, 1328 flow [2023-08-26 16:59:22,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1328, PETRI_PLACES=146, PETRI_TRANSITIONS=151} [2023-08-26 16:59:22,754 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2023-08-26 16:59:22,754 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 151 transitions, 1328 flow [2023-08-26 16:59:22,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.66666666666667) internal successors, (1200), 18 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:22,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:22,755 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:22,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:22,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:22,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:22,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:22,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1055520803, now seen corresponding path program 11 times [2023-08-26 16:59:22,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:22,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278970078] [2023-08-26 16:59:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:22,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:23,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:23,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278970078] [2023-08-26 16:59:23,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278970078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:23,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539404446] [2023-08-26 16:59:23,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:23,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:23,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:23,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:23,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 16:59:23,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 16:59:23,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:23,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:23,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:23,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:23,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539404446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:23,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:23,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-26 16:59:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716572684] [2023-08-26 16:59:23,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 16:59:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 16:59:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-26 16:59:23,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:23,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 151 transitions, 1328 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:23,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:23,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:23,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:25,140 INFO L124 PetriNetUnfolderBase]: 557/1103 cut-off events. [2023-08-26 16:59:25,141 INFO L125 PetriNetUnfolderBase]: For 3487/3487 co-relation queries the response was YES. [2023-08-26 16:59:25,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5542 conditions, 1103 events. 557/1103 cut-off events. For 3487/3487 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6188 event pairs, 18 based on Foata normal form. 7/1108 useless extension candidates. Maximal degree in co-relation 5503. Up to 491 conditions per place. [2023-08-26 16:59:25,149 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 171 selfloop transitions, 209 changer transitions 19/399 dead transitions. [2023-08-26 16:59:25,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 399 transitions, 3874 flow [2023-08-26 16:59:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-26 16:59:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-26 16:59:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3282 transitions. [2023-08-26 16:59:25,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879432624113475 [2023-08-26 16:59:25,154 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3282 transitions. [2023-08-26 16:59:25,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3282 transitions. [2023-08-26 16:59:25,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:25,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3282 transitions. [2023-08-26 16:59:25,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 69.82978723404256) internal successors, (3282), 47 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:25,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 180.0) internal successors, (8640), 48 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:25,166 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 180.0) internal successors, (8640), 48 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:25,166 INFO L175 Difference]: Start difference. First operand has 146 places, 151 transitions, 1328 flow. Second operand 47 states and 3282 transitions. [2023-08-26 16:59:25,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 399 transitions, 3874 flow [2023-08-26 16:59:25,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 399 transitions, 3632 flow, removed 101 selfloop flow, removed 9 redundant places. [2023-08-26 16:59:25,193 INFO L231 Difference]: Finished difference. Result has 194 places, 265 transitions, 2915 flow [2023-08-26 16:59:25,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2915, PETRI_PLACES=194, PETRI_TRANSITIONS=265} [2023-08-26 16:59:25,194 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 166 predicate places. [2023-08-26 16:59:25,194 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 265 transitions, 2915 flow [2023-08-26 16:59:25,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:25,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:25,194 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:25,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:25,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 16:59:25,400 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:25,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1509630253, now seen corresponding path program 12 times [2023-08-26 16:59:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:25,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821385442] [2023-08-26 16:59:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:25,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:25,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821385442] [2023-08-26 16:59:25,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821385442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:25,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942695695] [2023-08-26 16:59:25,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:25,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:25,566 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:25,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 16:59:25,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 16:59:25,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:25,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:25,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:25,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:26,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942695695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:26,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:26,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-26 16:59:26,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384718101] [2023-08-26 16:59:26,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 16:59:26,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 16:59:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-08-26 16:59:26,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:26,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 265 transitions, 2915 flow. Second operand has 24 states, 24 states have (on average 66.91666666666667) internal successors, (1606), 24 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:26,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:26,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:26,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:26,808 INFO L124 PetriNetUnfolderBase]: 615/1245 cut-off events. [2023-08-26 16:59:26,808 INFO L125 PetriNetUnfolderBase]: For 5254/5254 co-relation queries the response was YES. [2023-08-26 16:59:26,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6957 conditions, 1245 events. 615/1245 cut-off events. For 5254/5254 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7306 event pairs, 26 based on Foata normal form. 3/1248 useless extension candidates. Maximal degree in co-relation 6905. Up to 544 conditions per place. [2023-08-26 16:59:26,818 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 222 selfloop transitions, 133 changer transitions 33/388 dead transitions. [2023-08-26 16:59:26,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 388 transitions, 4477 flow [2023-08-26 16:59:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 16:59:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 16:59:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1638 transitions. [2023-08-26 16:59:26,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39565217391304347 [2023-08-26 16:59:26,820 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1638 transitions. [2023-08-26 16:59:26,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1638 transitions. [2023-08-26 16:59:26,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:26,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1638 transitions. [2023-08-26 16:59:26,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 71.21739130434783) internal successors, (1638), 23 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:26,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 180.0) internal successors, (4320), 24 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:26,826 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 180.0) internal successors, (4320), 24 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:26,826 INFO L175 Difference]: Start difference. First operand has 194 places, 265 transitions, 2915 flow. Second operand 23 states and 1638 transitions. [2023-08-26 16:59:26,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 388 transitions, 4477 flow [2023-08-26 16:59:26,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 388 transitions, 3758 flow, removed 294 selfloop flow, removed 16 redundant places. [2023-08-26 16:59:26,879 INFO L231 Difference]: Finished difference. Result has 198 places, 282 transitions, 2776 flow [2023-08-26 16:59:26,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2776, PETRI_PLACES=198, PETRI_TRANSITIONS=282} [2023-08-26 16:59:26,880 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 170 predicate places. [2023-08-26 16:59:26,880 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 282 transitions, 2776 flow [2023-08-26 16:59:26,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.91666666666667) internal successors, (1606), 24 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:26,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:26,881 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:26,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:27,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 16:59:27,085 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:27,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:27,086 INFO L85 PathProgramCache]: Analyzing trace with hash -214863733, now seen corresponding path program 13 times [2023-08-26 16:59:27,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:27,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868964148] [2023-08-26 16:59:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:27,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:27,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868964148] [2023-08-26 16:59:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868964148] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545151041] [2023-08-26 16:59:27,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:59:27,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:27,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:27,264 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:27,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 16:59:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:27,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:27,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:27,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:27,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545151041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:27,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:27,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-26 16:59:27,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313844261] [2023-08-26 16:59:27,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:27,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 16:59:27,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 16:59:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-08-26 16:59:27,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:27,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 282 transitions, 2776 flow. Second operand has 24 states, 24 states have (on average 66.875) internal successors, (1605), 24 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:27,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:27,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:27,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:29,275 INFO L124 PetriNetUnfolderBase]: 636/1290 cut-off events. [2023-08-26 16:59:29,275 INFO L125 PetriNetUnfolderBase]: For 3729/3729 co-relation queries the response was YES. [2023-08-26 16:59:29,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6437 conditions, 1290 events. 636/1290 cut-off events. For 3729/3729 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7682 event pairs, 22 based on Foata normal form. 7/1297 useless extension candidates. Maximal degree in co-relation 6389. Up to 568 conditions per place. [2023-08-26 16:59:29,286 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 233 selfloop transitions, 164 changer transitions 37/434 dead transitions. [2023-08-26 16:59:29,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 434 transitions, 4407 flow [2023-08-26 16:59:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-26 16:59:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-26 16:59:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3098 transitions. [2023-08-26 16:59:29,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39116161616161615 [2023-08-26 16:59:29,289 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3098 transitions. [2023-08-26 16:59:29,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3098 transitions. [2023-08-26 16:59:29,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:29,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3098 transitions. [2023-08-26 16:59:29,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 70.4090909090909) internal successors, (3098), 44 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:29,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 180.0) internal successors, (8100), 45 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:29,300 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 180.0) internal successors, (8100), 45 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:29,300 INFO L175 Difference]: Start difference. First operand has 198 places, 282 transitions, 2776 flow. Second operand 44 states and 3098 transitions. [2023-08-26 16:59:29,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 434 transitions, 4407 flow [2023-08-26 16:59:29,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 434 transitions, 4130 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-08-26 16:59:29,341 INFO L231 Difference]: Finished difference. Result has 229 places, 293 transitions, 2985 flow [2023-08-26 16:59:29,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2985, PETRI_PLACES=229, PETRI_TRANSITIONS=293} [2023-08-26 16:59:29,341 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 201 predicate places. [2023-08-26 16:59:29,342 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 293 transitions, 2985 flow [2023-08-26 16:59:29,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.875) internal successors, (1605), 24 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:29,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:29,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:29,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:29,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-26 16:59:29,547 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:29,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1863993939, now seen corresponding path program 14 times [2023-08-26 16:59:29,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:29,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334624083] [2023-08-26 16:59:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:29,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:29,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:29,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334624083] [2023-08-26 16:59:29,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334624083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:29,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722863466] [2023-08-26 16:59:29,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:29,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:29,738 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:29,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 16:59:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:29,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:29,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:29,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:30,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722863466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:30,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:30,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-08-26 16:59:30,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425474239] [2023-08-26 16:59:30,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:30,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 16:59:30,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 16:59:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-08-26 16:59:30,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:30,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 293 transitions, 2985 flow. Second operand has 23 states, 23 states have (on average 66.82608695652173) internal successors, (1537), 23 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:30,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:30,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:30,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:30,977 INFO L124 PetriNetUnfolderBase]: 695/1386 cut-off events. [2023-08-26 16:59:30,977 INFO L125 PetriNetUnfolderBase]: For 3747/3747 co-relation queries the response was YES. [2023-08-26 16:59:30,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7118 conditions, 1386 events. 695/1386 cut-off events. For 3747/3747 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8278 event pairs, 46 based on Foata normal form. 8/1394 useless extension candidates. Maximal degree in co-relation 7064. Up to 661 conditions per place. [2023-08-26 16:59:30,987 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 154 selfloop transitions, 167 changer transitions 78/399 dead transitions. [2023-08-26 16:59:30,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 399 transitions, 4408 flow [2023-08-26 16:59:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-26 16:59:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-26 16:59:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2221 transitions. [2023-08-26 16:59:30,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38559027777777777 [2023-08-26 16:59:30,989 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2221 transitions. [2023-08-26 16:59:30,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2221 transitions. [2023-08-26 16:59:30,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:30,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2221 transitions. [2023-08-26 16:59:30,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 69.40625) internal successors, (2221), 32 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:30,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:30,996 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:30,996 INFO L175 Difference]: Start difference. First operand has 229 places, 293 transitions, 2985 flow. Second operand 32 states and 2221 transitions. [2023-08-26 16:59:30,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 399 transitions, 4408 flow [2023-08-26 16:59:31,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 399 transitions, 4163 flow, removed 41 selfloop flow, removed 19 redundant places. [2023-08-26 16:59:31,038 INFO L231 Difference]: Finished difference. Result has 244 places, 276 transitions, 3072 flow [2023-08-26 16:59:31,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3072, PETRI_PLACES=244, PETRI_TRANSITIONS=276} [2023-08-26 16:59:31,039 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 216 predicate places. [2023-08-26 16:59:31,039 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 276 transitions, 3072 flow [2023-08-26 16:59:31,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 66.82608695652173) internal successors, (1537), 23 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:31,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:31,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:31,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 16:59:31,246 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:31,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1125087766, now seen corresponding path program 5 times [2023-08-26 16:59:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:31,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959435543] [2023-08-26 16:59:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:31,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959435543] [2023-08-26 16:59:31,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959435543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330738262] [2023-08-26 16:59:31,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:31,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:31,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:31,382 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:31,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 16:59:31,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:31,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:31,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 16:59:31,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:31,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330738262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:31,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:31,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 16:59:31,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867353092] [2023-08-26 16:59:31,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:31,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:31,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:31,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:31,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:31,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 276 transitions, 3072 flow. Second operand has 20 states, 20 states have (on average 66.7) internal successors, (1334), 20 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:31,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:31,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:31,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:32,274 INFO L124 PetriNetUnfolderBase]: 641/1255 cut-off events. [2023-08-26 16:59:32,274 INFO L125 PetriNetUnfolderBase]: For 4272/4272 co-relation queries the response was YES. [2023-08-26 16:59:32,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6991 conditions, 1255 events. 641/1255 cut-off events. For 4272/4272 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7174 event pairs, 25 based on Foata normal form. 9/1264 useless extension candidates. Maximal degree in co-relation 6930. Up to 696 conditions per place. [2023-08-26 16:59:32,287 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 197 selfloop transitions, 97 changer transitions 51/345 dead transitions. [2023-08-26 16:59:32,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 345 transitions, 4112 flow [2023-08-26 16:59:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 16:59:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 16:59:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1549 transitions. [2023-08-26 16:59:32,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39116161616161615 [2023-08-26 16:59:32,290 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1549 transitions. [2023-08-26 16:59:32,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1549 transitions. [2023-08-26 16:59:32,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:32,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1549 transitions. [2023-08-26 16:59:32,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.4090909090909) internal successors, (1549), 22 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:32,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:32,295 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:32,295 INFO L175 Difference]: Start difference. First operand has 244 places, 276 transitions, 3072 flow. Second operand 22 states and 1549 transitions. [2023-08-26 16:59:32,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 345 transitions, 4112 flow [2023-08-26 16:59:32,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 345 transitions, 3922 flow, removed 38 selfloop flow, removed 19 redundant places. [2023-08-26 16:59:32,343 INFO L231 Difference]: Finished difference. Result has 227 places, 262 transitions, 2993 flow [2023-08-26 16:59:32,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2993, PETRI_PLACES=227, PETRI_TRANSITIONS=262} [2023-08-26 16:59:32,344 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 199 predicate places. [2023-08-26 16:59:32,344 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 262 transitions, 2993 flow [2023-08-26 16:59:32,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.7) internal successors, (1334), 20 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:32,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:32,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:32,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:32,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:32,549 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:32,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:32,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2105992826, now seen corresponding path program 6 times [2023-08-26 16:59:32,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:32,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755895913] [2023-08-26 16:59:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:32,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:32,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:32,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755895913] [2023-08-26 16:59:32,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755895913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:32,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020613193] [2023-08-26 16:59:32,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:32,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:32,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:32,735 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:32,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 16:59:32,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 16:59:32,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:32,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 16:59:32,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:32,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:33,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020613193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:33,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:33,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 16:59:33,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637040900] [2023-08-26 16:59:33,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:33,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:33,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:33,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:33,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:33,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 262 transitions, 2993 flow. Second operand has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:33,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:33,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:33,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:33,701 INFO L124 PetriNetUnfolderBase]: 611/1244 cut-off events. [2023-08-26 16:59:33,701 INFO L125 PetriNetUnfolderBase]: For 4850/4850 co-relation queries the response was YES. [2023-08-26 16:59:33,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7064 conditions, 1244 events. 611/1244 cut-off events. For 4850/4850 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7365 event pairs, 28 based on Foata normal form. 6/1250 useless extension candidates. Maximal degree in co-relation 7002. Up to 581 conditions per place. [2023-08-26 16:59:33,709 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 159 selfloop transitions, 181 changer transitions 24/364 dead transitions. [2023-08-26 16:59:33,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 364 transitions, 4455 flow [2023-08-26 16:59:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-26 16:59:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-26 16:59:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1936 transitions. [2023-08-26 16:59:33,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38412698412698415 [2023-08-26 16:59:33,712 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1936 transitions. [2023-08-26 16:59:33,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1936 transitions. [2023-08-26 16:59:33,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:33,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1936 transitions. [2023-08-26 16:59:33,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 69.14285714285714) internal successors, (1936), 28 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:33,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 180.0) internal successors, (5220), 29 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:33,724 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 180.0) internal successors, (5220), 29 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:33,725 INFO L175 Difference]: Start difference. First operand has 227 places, 262 transitions, 2993 flow. Second operand 28 states and 1936 transitions. [2023-08-26 16:59:33,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 364 transitions, 4455 flow [2023-08-26 16:59:33,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 364 transitions, 4231 flow, removed 43 selfloop flow, removed 20 redundant places. [2023-08-26 16:59:33,772 INFO L231 Difference]: Finished difference. Result has 222 places, 294 transitions, 3605 flow [2023-08-26 16:59:33,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3605, PETRI_PLACES=222, PETRI_TRANSITIONS=294} [2023-08-26 16:59:33,773 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 194 predicate places. [2023-08-26 16:59:33,773 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 294 transitions, 3605 flow [2023-08-26 16:59:33,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:33,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:33,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:33,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:33,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-26 16:59:33,978 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:33,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2133698456, now seen corresponding path program 7 times [2023-08-26 16:59:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:33,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953457187] [2023-08-26 16:59:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:33,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:34,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:34,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953457187] [2023-08-26 16:59:34,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953457187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:34,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907166992] [2023-08-26 16:59:34,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:59:34,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:34,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:34,129 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:34,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 16:59:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:34,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 16:59:34,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:34,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:34,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907166992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:34,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:34,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 16:59:34,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659370587] [2023-08-26 16:59:34,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:34,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:34,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:34,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:34,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:34,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 294 transitions, 3605 flow. Second operand has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:34,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:34,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:34,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:35,129 INFO L124 PetriNetUnfolderBase]: 605/1242 cut-off events. [2023-08-26 16:59:35,129 INFO L125 PetriNetUnfolderBase]: For 4267/4267 co-relation queries the response was YES. [2023-08-26 16:59:35,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 1242 events. 605/1242 cut-off events. For 4267/4267 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7372 event pairs, 28 based on Foata normal form. 8/1250 useless extension candidates. Maximal degree in co-relation 7134. Up to 573 conditions per place. [2023-08-26 16:59:35,136 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 163 selfloop transitions, 174 changer transitions 32/369 dead transitions. [2023-08-26 16:59:35,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 369 transitions, 4794 flow [2023-08-26 16:59:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-26 16:59:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-26 16:59:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1804 transitions. [2023-08-26 16:59:35,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854700854700855 [2023-08-26 16:59:35,138 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1804 transitions. [2023-08-26 16:59:35,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1804 transitions. [2023-08-26 16:59:35,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:35,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1804 transitions. [2023-08-26 16:59:35,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 69.38461538461539) internal successors, (1804), 26 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:35,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 180.0) internal successors, (4860), 27 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:35,144 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 180.0) internal successors, (4860), 27 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:35,144 INFO L175 Difference]: Start difference. First operand has 222 places, 294 transitions, 3605 flow. Second operand 26 states and 1804 transitions. [2023-08-26 16:59:35,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 369 transitions, 4794 flow [2023-08-26 16:59:35,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 369 transitions, 4389 flow, removed 121 selfloop flow, removed 13 redundant places. [2023-08-26 16:59:35,177 INFO L231 Difference]: Finished difference. Result has 229 places, 290 transitions, 3538 flow [2023-08-26 16:59:35,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3209, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3538, PETRI_PLACES=229, PETRI_TRANSITIONS=290} [2023-08-26 16:59:35,178 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 201 predicate places. [2023-08-26 16:59:35,178 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 290 transitions, 3538 flow [2023-08-26 16:59:35,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:35,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:35,178 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:35,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:35,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:35,383 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:35,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash 820549891, now seen corresponding path program 15 times [2023-08-26 16:59:35,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:35,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979908823] [2023-08-26 16:59:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:35,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:35,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:35,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979908823] [2023-08-26 16:59:35,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979908823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:35,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096958027] [2023-08-26 16:59:35,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:35,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:35,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:35,569 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:35,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 16:59:35,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 16:59:35,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:35,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:35,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:35,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:35,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096958027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:35,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:35,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-08-26 16:59:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756204261] [2023-08-26 16:59:35,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:35,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:59:35,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:59:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-08-26 16:59:35,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:35,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 290 transitions, 3538 flow. Second operand has 22 states, 22 states have (on average 66.95454545454545) internal successors, (1473), 22 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:35,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:35,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:35,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:36,392 INFO L124 PetriNetUnfolderBase]: 583/1201 cut-off events. [2023-08-26 16:59:36,392 INFO L125 PetriNetUnfolderBase]: For 3668/3668 co-relation queries the response was YES. [2023-08-26 16:59:36,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6965 conditions, 1201 events. 583/1201 cut-off events. For 3668/3668 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7105 event pairs, 27 based on Foata normal form. 3/1202 useless extension candidates. Maximal degree in co-relation 6910. Up to 1137 conditions per place. [2023-08-26 16:59:36,402 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 282 selfloop transitions, 8 changer transitions 29/319 dead transitions. [2023-08-26 16:59:36,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 319 transitions, 4311 flow [2023-08-26 16:59:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:59:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:59:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 967 transitions. [2023-08-26 16:59:36,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38373015873015875 [2023-08-26 16:59:36,404 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 967 transitions. [2023-08-26 16:59:36,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 967 transitions. [2023-08-26 16:59:36,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:36,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 967 transitions. [2023-08-26 16:59:36,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:36,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 180.0) internal successors, (2700), 15 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:36,407 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 180.0) internal successors, (2700), 15 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:36,407 INFO L175 Difference]: Start difference. First operand has 229 places, 290 transitions, 3538 flow. Second operand 14 states and 967 transitions. [2023-08-26 16:59:36,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 319 transitions, 4311 flow [2023-08-26 16:59:36,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 319 transitions, 4009 flow, removed 17 selfloop flow, removed 17 redundant places. [2023-08-26 16:59:36,449 INFO L231 Difference]: Finished difference. Result has 226 places, 285 transitions, 3230 flow [2023-08-26 16:59:36,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3230, PETRI_PLACES=226, PETRI_TRANSITIONS=285} [2023-08-26 16:59:36,450 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 198 predicate places. [2023-08-26 16:59:36,450 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 285 transitions, 3230 flow [2023-08-26 16:59:36,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.95454545454545) internal successors, (1473), 22 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:36,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:36,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:36,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:36,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:36,656 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:36,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -401247799, now seen corresponding path program 16 times [2023-08-26 16:59:36,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844499078] [2023-08-26 16:59:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:36,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:36,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844499078] [2023-08-26 16:59:36,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844499078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:36,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713066784] [2023-08-26 16:59:36,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:36,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:36,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:36,821 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:36,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-26 16:59:36,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:36,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:36,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:36,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:37,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:37,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713066784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:37,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:37,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-26 16:59:37,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803533119] [2023-08-26 16:59:37,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:37,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 16:59:37,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 16:59:37,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-08-26 16:59:37,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:37,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 285 transitions, 3230 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:37,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:37,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:37,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:37,881 INFO L124 PetriNetUnfolderBase]: 582/1201 cut-off events. [2023-08-26 16:59:37,881 INFO L125 PetriNetUnfolderBase]: For 3316/3316 co-relation queries the response was YES. [2023-08-26 16:59:37,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6688 conditions, 1201 events. 582/1201 cut-off events. For 3316/3316 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7149 event pairs, 27 based on Foata normal form. 4/1203 useless extension candidates. Maximal degree in co-relation 6627. Up to 1122 conditions per place. [2023-08-26 16:59:37,891 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 279 selfloop transitions, 15 changer transitions 29/323 dead transitions. [2023-08-26 16:59:37,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 323 transitions, 4078 flow [2023-08-26 16:59:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:59:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:59:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1305 transitions. [2023-08-26 16:59:37,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815789473684211 [2023-08-26 16:59:37,898 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1305 transitions. [2023-08-26 16:59:37,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1305 transitions. [2023-08-26 16:59:37,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:37,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1305 transitions. [2023-08-26 16:59:37,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 68.6842105263158) internal successors, (1305), 19 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:37,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:37,903 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:37,903 INFO L175 Difference]: Start difference. First operand has 226 places, 285 transitions, 3230 flow. Second operand 19 states and 1305 transitions. [2023-08-26 16:59:37,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 323 transitions, 4078 flow [2023-08-26 16:59:37,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 323 transitions, 4020 flow, removed 19 selfloop flow, removed 13 redundant places. [2023-08-26 16:59:37,947 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3245 flow [2023-08-26 16:59:37,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3245, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2023-08-26 16:59:37,948 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 198 predicate places. [2023-08-26 16:59:37,948 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3245 flow [2023-08-26 16:59:37,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:37,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:37,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:37,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:38,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:38,153 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:38,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:38,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1496196791, now seen corresponding path program 17 times [2023-08-26 16:59:38,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:38,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381621691] [2023-08-26 16:59:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:38,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:38,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381621691] [2023-08-26 16:59:38,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381621691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:38,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135406808] [2023-08-26 16:59:38,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:38,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:38,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:38,302 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:38,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-26 16:59:38,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 16:59:38,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:38,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:38,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:38,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:38,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135406808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:38,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:38,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-26 16:59:38,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753726122] [2023-08-26 16:59:38,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:38,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 16:59:38,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 16:59:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-08-26 16:59:38,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:38,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3245 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:38,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:38,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:38,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:39,729 INFO L124 PetriNetUnfolderBase]: 626/1285 cut-off events. [2023-08-26 16:59:39,729 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2023-08-26 16:59:39,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7166 conditions, 1285 events. 626/1285 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7748 event pairs, 29 based on Foata normal form. 6/1289 useless extension candidates. Maximal degree in co-relation 7106. Up to 1073 conditions per place. [2023-08-26 16:59:39,738 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 280 selfloop transitions, 53 changer transitions 41/374 dead transitions. [2023-08-26 16:59:39,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 374 transitions, 4675 flow [2023-08-26 16:59:39,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 16:59:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 16:59:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2001 transitions. [2023-08-26 16:59:39,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2023-08-26 16:59:39,740 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2001 transitions. [2023-08-26 16:59:39,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2001 transitions. [2023-08-26 16:59:39,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:39,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2001 transitions. [2023-08-26 16:59:39,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 69.0) internal successors, (2001), 29 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:39,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 180.0) internal successors, (5400), 30 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:39,747 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 180.0) internal successors, (5400), 30 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:39,747 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3245 flow. Second operand 29 states and 2001 transitions. [2023-08-26 16:59:39,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 374 transitions, 4675 flow [2023-08-26 16:59:39,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 374 transitions, 4592 flow, removed 29 selfloop flow, removed 13 redundant places. [2023-08-26 16:59:39,795 INFO L231 Difference]: Finished difference. Result has 241 places, 301 transitions, 3576 flow [2023-08-26 16:59:39,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3576, PETRI_PLACES=241, PETRI_TRANSITIONS=301} [2023-08-26 16:59:39,796 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 213 predicate places. [2023-08-26 16:59:39,796 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 301 transitions, 3576 flow [2023-08-26 16:59:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:39,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:39,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:39,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:40,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:40,001 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:40,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash -544112974, now seen corresponding path program 8 times [2023-08-26 16:59:40,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:40,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004026787] [2023-08-26 16:59:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:40,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:40,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004026787] [2023-08-26 16:59:40,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004026787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417777281] [2023-08-26 16:59:40,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:40,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:40,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:40,143 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:40,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-26 16:59:40,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:40,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:40,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 16:59:40,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:40,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417777281] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:40,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:40,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 16:59:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487974675] [2023-08-26 16:59:40,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:40,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:40,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:40,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 301 transitions, 3576 flow. Second operand has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:40,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:40,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:40,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:41,062 INFO L124 PetriNetUnfolderBase]: 624/1270 cut-off events. [2023-08-26 16:59:41,062 INFO L125 PetriNetUnfolderBase]: For 3783/3783 co-relation queries the response was YES. [2023-08-26 16:59:41,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7203 conditions, 1270 events. 624/1270 cut-off events. For 3783/3783 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7589 event pairs, 33 based on Foata normal form. 13/1281 useless extension candidates. Maximal degree in co-relation 7138. Up to 1047 conditions per place. [2023-08-26 16:59:41,071 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 298 selfloop transitions, 56 changer transitions 19/373 dead transitions. [2023-08-26 16:59:41,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 373 transitions, 4744 flow [2023-08-26 16:59:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 16:59:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 16:59:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1733 transitions. [2023-08-26 16:59:41,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851111111111111 [2023-08-26 16:59:41,073 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1733 transitions. [2023-08-26 16:59:41,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1733 transitions. [2023-08-26 16:59:41,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:41,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1733 transitions. [2023-08-26 16:59:41,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 69.32) internal successors, (1733), 25 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:41,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 180.0) internal successors, (4680), 26 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:41,077 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 180.0) internal successors, (4680), 26 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:41,077 INFO L175 Difference]: Start difference. First operand has 241 places, 301 transitions, 3576 flow. Second operand 25 states and 1733 transitions. [2023-08-26 16:59:41,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 373 transitions, 4744 flow [2023-08-26 16:59:41,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 373 transitions, 4386 flow, removed 150 selfloop flow, removed 20 redundant places. [2023-08-26 16:59:41,111 INFO L231 Difference]: Finished difference. Result has 244 places, 315 transitions, 3583 flow [2023-08-26 16:59:41,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3583, PETRI_PLACES=244, PETRI_TRANSITIONS=315} [2023-08-26 16:59:41,112 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 216 predicate places. [2023-08-26 16:59:41,112 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 315 transitions, 3583 flow [2023-08-26 16:59:41,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:41,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:41,112 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:41,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:41,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-26 16:59:41,317 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:41,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:41,317 INFO L85 PathProgramCache]: Analyzing trace with hash 141116569, now seen corresponding path program 18 times [2023-08-26 16:59:41,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:41,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440364911] [2023-08-26 16:59:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:41,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:41,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:41,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440364911] [2023-08-26 16:59:41,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440364911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:41,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495462968] [2023-08-26 16:59:41,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:41,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:41,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:41,497 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:41,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-26 16:59:41,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 16:59:41,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:41,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:41,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:41,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:41,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495462968] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:41,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:41,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-26 16:59:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061492892] [2023-08-26 16:59:41,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:41,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 16:59:41,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 16:59:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2023-08-26 16:59:41,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:41,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 315 transitions, 3583 flow. Second operand has 24 states, 24 states have (on average 66.79166666666667) internal successors, (1603), 24 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:41,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:41,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:41,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:42,967 INFO L124 PetriNetUnfolderBase]: 660/1343 cut-off events. [2023-08-26 16:59:42,967 INFO L125 PetriNetUnfolderBase]: For 5080/5080 co-relation queries the response was YES. [2023-08-26 16:59:42,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7679 conditions, 1343 events. 660/1343 cut-off events. For 5080/5080 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8176 event pairs, 13 based on Foata normal form. 4/1343 useless extension candidates. Maximal degree in co-relation 7611. Up to 1026 conditions per place. [2023-08-26 16:59:42,977 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 301 selfloop transitions, 87 changer transitions 20/408 dead transitions. [2023-08-26 16:59:42,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 408 transitions, 5044 flow [2023-08-26 16:59:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 16:59:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 16:59:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2018 transitions. [2023-08-26 16:59:42,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38659003831417627 [2023-08-26 16:59:42,978 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2018 transitions. [2023-08-26 16:59:42,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2018 transitions. [2023-08-26 16:59:42,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:42,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2018 transitions. [2023-08-26 16:59:42,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 69.58620689655173) internal successors, (2018), 29 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:42,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 180.0) internal successors, (5400), 30 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:42,984 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 180.0) internal successors, (5400), 30 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:42,984 INFO L175 Difference]: Start difference. First operand has 244 places, 315 transitions, 3583 flow. Second operand 29 states and 2018 transitions. [2023-08-26 16:59:42,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 408 transitions, 5044 flow [2023-08-26 16:59:43,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 408 transitions, 4801 flow, removed 78 selfloop flow, removed 13 redundant places. [2023-08-26 16:59:43,037 INFO L231 Difference]: Finished difference. Result has 261 places, 340 transitions, 3982 flow [2023-08-26 16:59:43,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3982, PETRI_PLACES=261, PETRI_TRANSITIONS=340} [2023-08-26 16:59:43,038 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 233 predicate places. [2023-08-26 16:59:43,038 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 340 transitions, 3982 flow [2023-08-26 16:59:43,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.79166666666667) internal successors, (1603), 24 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:43,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:43,039 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:43,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:43,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-26 16:59:43,243 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:43,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 221552269, now seen corresponding path program 19 times [2023-08-26 16:59:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:43,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405692917] [2023-08-26 16:59:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:43,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:43,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405692917] [2023-08-26 16:59:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405692917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:43,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525365366] [2023-08-26 16:59:43,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:59:43,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:43,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:43,405 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:43,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-26 16:59:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:43,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:43,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:43,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:43,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525365366] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:43,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:43,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-26 16:59:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594564269] [2023-08-26 16:59:43,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:43,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 16:59:43,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 16:59:43,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-26 16:59:43,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:43,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 340 transitions, 3982 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:43,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:43,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:43,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:45,025 INFO L124 PetriNetUnfolderBase]: 648/1308 cut-off events. [2023-08-26 16:59:45,025 INFO L125 PetriNetUnfolderBase]: For 4700/4700 co-relation queries the response was YES. [2023-08-26 16:59:45,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7607 conditions, 1308 events. 648/1308 cut-off events. For 4700/4700 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7791 event pairs, 15 based on Foata normal form. 3/1307 useless extension candidates. Maximal degree in co-relation 7537. Up to 1006 conditions per place. [2023-08-26 16:59:45,034 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 291 selfloop transitions, 85 changer transitions 21/397 dead transitions. [2023-08-26 16:59:45,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 397 transitions, 4941 flow [2023-08-26 16:59:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-26 16:59:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-26 16:59:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2076 transitions. [2023-08-26 16:59:45,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844444444444444 [2023-08-26 16:59:45,036 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2076 transitions. [2023-08-26 16:59:45,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2076 transitions. [2023-08-26 16:59:45,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:45,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2076 transitions. [2023-08-26 16:59:45,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 69.2) internal successors, (2076), 30 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:45,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 180.0) internal successors, (5580), 31 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:45,043 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 180.0) internal successors, (5580), 31 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:45,043 INFO L175 Difference]: Start difference. First operand has 261 places, 340 transitions, 3982 flow. Second operand 30 states and 2076 transitions. [2023-08-26 16:59:45,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 397 transitions, 4941 flow [2023-08-26 16:59:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 397 transitions, 4718 flow, removed 81 selfloop flow, removed 12 redundant places. [2023-08-26 16:59:45,098 INFO L231 Difference]: Finished difference. Result has 272 places, 335 transitions, 3876 flow [2023-08-26 16:59:45,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3876, PETRI_PLACES=272, PETRI_TRANSITIONS=335} [2023-08-26 16:59:45,099 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 244 predicate places. [2023-08-26 16:59:45,099 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 335 transitions, 3876 flow [2023-08-26 16:59:45,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:45,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:45,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:45,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:45,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 16:59:45,304 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:45,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash 118019682, now seen corresponding path program 9 times [2023-08-26 16:59:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:45,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848910284] [2023-08-26 16:59:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:45,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848910284] [2023-08-26 16:59:45,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848910284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:45,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246528681] [2023-08-26 16:59:45,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:45,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:45,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:45,442 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:45,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-26 16:59:45,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:59:45,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:45,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 16:59:45,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:45,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:45,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246528681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:45,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:45,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 16:59:45,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553211785] [2023-08-26 16:59:45,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:45,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:45,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:45,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:45,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 335 transitions, 3876 flow. Second operand has 20 states, 20 states have (on average 66.7) internal successors, (1334), 20 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:45,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:45,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:45,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:46,175 INFO L124 PetriNetUnfolderBase]: 644/1287 cut-off events. [2023-08-26 16:59:46,176 INFO L125 PetriNetUnfolderBase]: For 4071/4071 co-relation queries the response was YES. [2023-08-26 16:59:46,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7461 conditions, 1287 events. 644/1287 cut-off events. For 4071/4071 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7594 event pairs, 8 based on Foata normal form. 10/1293 useless extension candidates. Maximal degree in co-relation 7391. Up to 980 conditions per place. [2023-08-26 16:59:46,184 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 294 selfloop transitions, 32 changer transitions 58/384 dead transitions. [2023-08-26 16:59:46,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 384 transitions, 4870 flow [2023-08-26 16:59:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:59:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:59:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1322 transitions. [2023-08-26 16:59:46,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865497076023392 [2023-08-26 16:59:46,186 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1322 transitions. [2023-08-26 16:59:46,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1322 transitions. [2023-08-26 16:59:46,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:46,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1322 transitions. [2023-08-26 16:59:46,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 69.57894736842105) internal successors, (1322), 19 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:46,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:46,188 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:46,188 INFO L175 Difference]: Start difference. First operand has 272 places, 335 transitions, 3876 flow. Second operand 19 states and 1322 transitions. [2023-08-26 16:59:46,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 384 transitions, 4870 flow [2023-08-26 16:59:46,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 384 transitions, 4689 flow, removed 27 selfloop flow, removed 21 redundant places. [2023-08-26 16:59:46,227 INFO L231 Difference]: Finished difference. Result has 261 places, 306 transitions, 3436 flow [2023-08-26 16:59:46,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3705, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3436, PETRI_PLACES=261, PETRI_TRANSITIONS=306} [2023-08-26 16:59:46,228 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 233 predicate places. [2023-08-26 16:59:46,228 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 306 transitions, 3436 flow [2023-08-26 16:59:46,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.7) internal successors, (1334), 20 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:46,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:46,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:46,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:46,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-26 16:59:46,433 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:46,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1210540169, now seen corresponding path program 10 times [2023-08-26 16:59:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711455077] [2023-08-26 16:59:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:46,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:46,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:46,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711455077] [2023-08-26 16:59:46,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711455077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:46,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570737642] [2023-08-26 16:59:46,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:46,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:46,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:46,609 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:46,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-26 16:59:46,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:46,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:46,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:46,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:46,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:59:46,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570737642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:46,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:46,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-26 16:59:46,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570814850] [2023-08-26 16:59:46,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:46,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:59:46,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:59:46,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-08-26 16:59:46,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:46,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 306 transitions, 3436 flow. Second operand has 22 states, 22 states have (on average 66.72727272727273) internal successors, (1468), 22 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:46,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:46,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:46,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:47,559 INFO L124 PetriNetUnfolderBase]: 551/1152 cut-off events. [2023-08-26 16:59:47,559 INFO L125 PetriNetUnfolderBase]: For 3514/3514 co-relation queries the response was YES. [2023-08-26 16:59:47,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6549 conditions, 1152 events. 551/1152 cut-off events. For 3514/3514 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6891 event pairs, 11 based on Foata normal form. 14/1162 useless extension candidates. Maximal degree in co-relation 6479. Up to 735 conditions per place. [2023-08-26 16:59:47,567 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 258 selfloop transitions, 98 changer transitions 16/372 dead transitions. [2023-08-26 16:59:47,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 372 transitions, 4509 flow [2023-08-26 16:59:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 16:59:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 16:59:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1736 transitions. [2023-08-26 16:59:47,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3857777777777778 [2023-08-26 16:59:47,569 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1736 transitions. [2023-08-26 16:59:47,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1736 transitions. [2023-08-26 16:59:47,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:47,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1736 transitions. [2023-08-26 16:59:47,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 69.44) internal successors, (1736), 25 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:47,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 180.0) internal successors, (4680), 26 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:47,572 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 180.0) internal successors, (4680), 26 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:47,572 INFO L175 Difference]: Start difference. First operand has 261 places, 306 transitions, 3436 flow. Second operand 25 states and 1736 transitions. [2023-08-26 16:59:47,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 372 transitions, 4509 flow [2023-08-26 16:59:47,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 372 transitions, 4364 flow, removed 22 selfloop flow, removed 18 redundant places. [2023-08-26 16:59:47,601 INFO L231 Difference]: Finished difference. Result has 250 places, 311 transitions, 3605 flow [2023-08-26 16:59:47,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3605, PETRI_PLACES=250, PETRI_TRANSITIONS=311} [2023-08-26 16:59:47,602 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 222 predicate places. [2023-08-26 16:59:47,602 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 311 transitions, 3605 flow [2023-08-26 16:59:47,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.72727272727273) internal successors, (1468), 22 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:47,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:47,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:47,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-26 16:59:47,807 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:47,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1922694099, now seen corresponding path program 11 times [2023-08-26 16:59:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:47,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324873242] [2023-08-26 16:59:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:47,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324873242] [2023-08-26 16:59:47,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324873242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:47,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397064616] [2023-08-26 16:59:47,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:47,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:47,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:47,964 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:47,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-26 16:59:48,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 16:59:48,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:48,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:48,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:48,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:59:48,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397064616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:48,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:48,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-26 16:59:48,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675465006] [2023-08-26 16:59:48,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:48,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:59:48,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:59:48,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-08-26 16:59:48,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:48,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 311 transitions, 3605 flow. Second operand has 22 states, 22 states have (on average 66.72727272727273) internal successors, (1468), 22 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:48,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:48,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:48,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:48,842 INFO L124 PetriNetUnfolderBase]: 541/1087 cut-off events. [2023-08-26 16:59:48,842 INFO L125 PetriNetUnfolderBase]: For 3029/3029 co-relation queries the response was YES. [2023-08-26 16:59:48,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6316 conditions, 1087 events. 541/1087 cut-off events. For 3029/3029 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6163 event pairs, 11 based on Foata normal form. 5/1088 useless extension candidates. Maximal degree in co-relation 6251. Up to 735 conditions per place. [2023-08-26 16:59:48,849 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 245 selfloop transitions, 91 changer transitions 19/355 dead transitions. [2023-08-26 16:59:48,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 355 transitions, 4434 flow [2023-08-26 16:59:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 16:59:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 16:59:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1528 transitions. [2023-08-26 16:59:48,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38585858585858585 [2023-08-26 16:59:48,859 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1528 transitions. [2023-08-26 16:59:48,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1528 transitions. [2023-08-26 16:59:48,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:48,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1528 transitions. [2023-08-26 16:59:48,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 69.45454545454545) internal successors, (1528), 22 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:48,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:48,862 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:48,862 INFO L175 Difference]: Start difference. First operand has 250 places, 311 transitions, 3605 flow. Second operand 22 states and 1528 transitions. [2023-08-26 16:59:48,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 355 transitions, 4434 flow [2023-08-26 16:59:48,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 355 transitions, 4172 flow, removed 35 selfloop flow, removed 18 redundant places. [2023-08-26 16:59:48,910 INFO L231 Difference]: Finished difference. Result has 249 places, 304 transitions, 3441 flow [2023-08-26 16:59:48,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3441, PETRI_PLACES=249, PETRI_TRANSITIONS=304} [2023-08-26 16:59:48,911 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 221 predicate places. [2023-08-26 16:59:48,911 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 304 transitions, 3441 flow [2023-08-26 16:59:48,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.72727272727273) internal successors, (1468), 22 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:48,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:48,911 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:48,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:49,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-26 16:59:49,116 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:49,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1139944269, now seen corresponding path program 20 times [2023-08-26 16:59:49,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:49,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796103079] [2023-08-26 16:59:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:49,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:49,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796103079] [2023-08-26 16:59:49,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796103079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:49,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936066439] [2023-08-26 16:59:49,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:49,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:49,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:49,278 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:49,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-26 16:59:49,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:49,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-26 16:59:49,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:49,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936066439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:49,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-08-26 16:59:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277698316] [2023-08-26 16:59:49,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 16:59:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 16:59:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-26 16:59:49,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:49,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 304 transitions, 3441 flow. Second operand has 26 states, 26 states have (on average 66.88461538461539) internal successors, (1739), 26 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:49,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:49,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:49,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:50,993 INFO L124 PetriNetUnfolderBase]: 636/1250 cut-off events. [2023-08-26 16:59:50,994 INFO L125 PetriNetUnfolderBase]: For 3299/3299 co-relation queries the response was YES. [2023-08-26 16:59:50,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7295 conditions, 1250 events. 636/1250 cut-off events. For 3299/3299 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7142 event pairs, 9 based on Foata normal form. 3/1249 useless extension candidates. Maximal degree in co-relation 7233. Up to 533 conditions per place. [2023-08-26 16:59:51,001 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 213 selfloop transitions, 210 changer transitions 27/450 dead transitions. [2023-08-26 16:59:51,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 450 transitions, 5485 flow [2023-08-26 16:59:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 16:59:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 16:59:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2566 transitions. [2023-08-26 16:59:51,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852852852852853 [2023-08-26 16:59:51,008 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2566 transitions. [2023-08-26 16:59:51,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2566 transitions. [2023-08-26 16:59:51,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:51,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2566 transitions. [2023-08-26 16:59:51,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 69.35135135135135) internal successors, (2566), 37 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:51,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 180.0) internal successors, (6840), 38 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:51,017 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 180.0) internal successors, (6840), 38 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:51,017 INFO L175 Difference]: Start difference. First operand has 249 places, 304 transitions, 3441 flow. Second operand 37 states and 2566 transitions. [2023-08-26 16:59:51,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 450 transitions, 5485 flow [2023-08-26 16:59:51,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 450 transitions, 5233 flow, removed 8 selfloop flow, removed 18 redundant places. [2023-08-26 16:59:51,058 INFO L231 Difference]: Finished difference. Result has 262 places, 352 transitions, 4425 flow [2023-08-26 16:59:51,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4425, PETRI_PLACES=262, PETRI_TRANSITIONS=352} [2023-08-26 16:59:51,059 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 234 predicate places. [2023-08-26 16:59:51,059 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 352 transitions, 4425 flow [2023-08-26 16:59:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 66.88461538461539) internal successors, (1739), 26 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:51,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:51,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:51,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:51,265 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:51,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1859447152, now seen corresponding path program 12 times [2023-08-26 16:59:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:51,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842770827] [2023-08-26 16:59:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:51,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:51,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842770827] [2023-08-26 16:59:51,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842770827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311462779] [2023-08-26 16:59:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:51,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:51,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:51,401 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:51,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-26 16:59:51,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 16:59:51,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:51,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:51,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:51,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:51,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311462779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:51,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:51,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-08-26 16:59:51,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307556784] [2023-08-26 16:59:51,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:51,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:51,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:51,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:51,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 352 transitions, 4425 flow. Second operand has 20 states, 20 states have (on average 66.8) internal successors, (1336), 20 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:51,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:51,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:51,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:52,098 INFO L124 PetriNetUnfolderBase]: 628/1217 cut-off events. [2023-08-26 16:59:52,098 INFO L125 PetriNetUnfolderBase]: For 3694/3694 co-relation queries the response was YES. [2023-08-26 16:59:52,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7562 conditions, 1217 events. 628/1217 cut-off events. For 3694/3694 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6836 event pairs, 9 based on Foata normal form. 14/1227 useless extension candidates. Maximal degree in co-relation 7496. Up to 531 conditions per place. [2023-08-26 16:59:52,105 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 101 selfloop transitions, 26 changer transitions 269/396 dead transitions. [2023-08-26 16:59:52,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 396 transitions, 5522 flow [2023-08-26 16:59:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 16:59:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 16:59:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1380 transitions. [2023-08-26 16:59:52,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2023-08-26 16:59:52,107 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1380 transitions. [2023-08-26 16:59:52,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1380 transitions. [2023-08-26 16:59:52,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:52,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1380 transitions. [2023-08-26 16:59:52,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 69.0) internal successors, (1380), 20 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:52,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 180.0) internal successors, (3780), 21 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:52,110 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 180.0) internal successors, (3780), 21 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:52,110 INFO L175 Difference]: Start difference. First operand has 262 places, 352 transitions, 4425 flow. Second operand 20 states and 1380 transitions. [2023-08-26 16:59:52,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 396 transitions, 5522 flow [2023-08-26 16:59:52,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 396 transitions, 5241 flow, removed 42 selfloop flow, removed 21 redundant places. [2023-08-26 16:59:52,144 INFO L231 Difference]: Finished difference. Result has 244 places, 115 transitions, 1178 flow [2023-08-26 16:59:52,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1178, PETRI_PLACES=244, PETRI_TRANSITIONS=115} [2023-08-26 16:59:52,144 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 216 predicate places. [2023-08-26 16:59:52,144 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 115 transitions, 1178 flow [2023-08-26 16:59:52,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.8) internal successors, (1336), 20 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:52,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:52,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:52,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:52,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:52,345 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:52,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1656029813, now seen corresponding path program 13 times [2023-08-26 16:59:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:52,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363025266] [2023-08-26 16:59:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:52,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363025266] [2023-08-26 16:59:52,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363025266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936445295] [2023-08-26 16:59:52,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:59:52,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:52,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:52,516 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:52,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-26 16:59:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:52,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:52,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:52,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:59:52,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936445295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:52,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:52,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-26 16:59:52,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921885713] [2023-08-26 16:59:52,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:52,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:59:52,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:52,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:59:52,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-08-26 16:59:52,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:52,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 115 transitions, 1178 flow. Second operand has 22 states, 22 states have (on average 66.5909090909091) internal successors, (1465), 22 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:52,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:52,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:52,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:53,045 INFO L124 PetriNetUnfolderBase]: 166/373 cut-off events. [2023-08-26 16:59:53,045 INFO L125 PetriNetUnfolderBase]: For 992/992 co-relation queries the response was YES. [2023-08-26 16:59:53,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2039 conditions, 373 events. 166/373 cut-off events. For 992/992 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1679 event pairs, 7 based on Foata normal form. 8/379 useless extension candidates. Maximal degree in co-relation 1976. Up to 230 conditions per place. [2023-08-26 16:59:53,048 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 81 selfloop transitions, 8 changer transitions 48/137 dead transitions. [2023-08-26 16:59:53,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 137 transitions, 1523 flow [2023-08-26 16:59:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 16:59:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 16:59:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1096 transitions. [2023-08-26 16:59:53,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2023-08-26 16:59:53,050 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1096 transitions. [2023-08-26 16:59:53,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1096 transitions. [2023-08-26 16:59:53,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:53,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1096 transitions. [2023-08-26 16:59:53,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 68.5) internal successors, (1096), 16 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:53,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 180.0) internal successors, (3060), 17 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:53,053 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 180.0) internal successors, (3060), 17 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:53,053 INFO L175 Difference]: Start difference. First operand has 244 places, 115 transitions, 1178 flow. Second operand 16 states and 1096 transitions. [2023-08-26 16:59:53,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 137 transitions, 1523 flow [2023-08-26 16:59:53,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 137 transitions, 1231 flow, removed 23 selfloop flow, removed 48 redundant places. [2023-08-26 16:59:53,063 INFO L231 Difference]: Finished difference. Result has 143 places, 86 transitions, 707 flow [2023-08-26 16:59:53,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=707, PETRI_PLACES=143, PETRI_TRANSITIONS=86} [2023-08-26 16:59:53,064 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2023-08-26 16:59:53,064 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 86 transitions, 707 flow [2023-08-26 16:59:53,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.5909090909091) internal successors, (1465), 22 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:53,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:53,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:53,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:53,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-26 16:59:53,269 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:53,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash -840850595, now seen corresponding path program 14 times [2023-08-26 16:59:53,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:53,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831011467] [2023-08-26 16:59:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:53,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:53,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:53,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831011467] [2023-08-26 16:59:53,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831011467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:53,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418428017] [2023-08-26 16:59:53,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:53,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:53,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:53,428 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:53,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-26 16:59:53,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:53,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:53,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:53,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:53,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:59:53,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418428017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:53,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:53,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-26 16:59:53,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185762931] [2023-08-26 16:59:53,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:53,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:59:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:59:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-26 16:59:53,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:53,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 86 transitions, 707 flow. Second operand has 22 states, 22 states have (on average 66.63636363636364) internal successors, (1466), 22 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:53,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:53,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:53,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:54,085 INFO L124 PetriNetUnfolderBase]: 134/275 cut-off events. [2023-08-26 16:59:54,085 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2023-08-26 16:59:54,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1304 conditions, 275 events. 134/275 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1053 event pairs, 0 based on Foata normal form. 6/281 useless extension candidates. Maximal degree in co-relation 1262. Up to 93 conditions per place. [2023-08-26 16:59:54,087 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 59 selfloop transitions, 43 changer transitions 19/121 dead transitions. [2023-08-26 16:59:54,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 121 transitions, 1089 flow [2023-08-26 16:59:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 16:59:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 16:59:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1235 transitions. [2023-08-26 16:59:54,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38117283950617287 [2023-08-26 16:59:54,088 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1235 transitions. [2023-08-26 16:59:54,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1235 transitions. [2023-08-26 16:59:54,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:54,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1235 transitions. [2023-08-26 16:59:54,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 68.61111111111111) internal successors, (1235), 18 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,092 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,092 INFO L175 Difference]: Start difference. First operand has 143 places, 86 transitions, 707 flow. Second operand 18 states and 1235 transitions. [2023-08-26 16:59:54,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 121 transitions, 1089 flow [2023-08-26 16:59:54,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 121 transitions, 1005 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-08-26 16:59:54,098 INFO L231 Difference]: Finished difference. Result has 115 places, 85 transitions, 717 flow [2023-08-26 16:59:54,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=717, PETRI_PLACES=115, PETRI_TRANSITIONS=85} [2023-08-26 16:59:54,098 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 87 predicate places. [2023-08-26 16:59:54,099 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 85 transitions, 717 flow [2023-08-26 16:59:54,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.63636363636364) internal successors, (1466), 22 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:54,099 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:54,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:54,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:54,304 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:54,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1234564838, now seen corresponding path program 15 times [2023-08-26 16:59:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:54,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64789364] [2023-08-26 16:59:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:54,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64789364] [2023-08-26 16:59:54,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64789364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:54,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541168488] [2023-08-26 16:59:54,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:54,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:54,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:54,457 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:54,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-26 16:59:54,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 16:59:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:54,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:59:54,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:54,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:54,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541168488] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:54,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:54,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-08-26 16:59:54,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668692419] [2023-08-26 16:59:54,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:54,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:54,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:54,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:54,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-26 16:59:54,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 85 transitions, 717 flow. Second operand has 20 states, 20 states have (on average 66.7) internal successors, (1334), 20 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:54,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-26 16:59:54,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:54,963 INFO L124 PetriNetUnfolderBase]: 121/233 cut-off events. [2023-08-26 16:59:54,964 INFO L125 PetriNetUnfolderBase]: For 374/374 co-relation queries the response was YES. [2023-08-26 16:59:54,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 233 events. 121/233 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 809 event pairs, 0 based on Foata normal form. 3/234 useless extension candidates. Maximal degree in co-relation 1134. Up to 93 conditions per place. [2023-08-26 16:59:54,967 INFO L140 encePairwiseOnDemand]: 172/180 looper letters, 0 selfloop transitions, 0 changer transitions 107/107 dead transitions. [2023-08-26 16:59:54,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 107 transitions, 1016 flow [2023-08-26 16:59:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 16:59:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 16:59:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1085 transitions. [2023-08-26 16:59:54,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767361111111111 [2023-08-26 16:59:54,969 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1085 transitions. [2023-08-26 16:59:54,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1085 transitions. [2023-08-26 16:59:54,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:54,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1085 transitions. [2023-08-26 16:59:54,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.8125) internal successors, (1085), 16 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 180.0) internal successors, (3060), 17 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,971 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 180.0) internal successors, (3060), 17 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,971 INFO L175 Difference]: Start difference. First operand has 115 places, 85 transitions, 717 flow. Second operand 16 states and 1085 transitions. [2023-08-26 16:59:54,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 107 transitions, 1016 flow [2023-08-26 16:59:54,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 107 transitions, 933 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-08-26 16:59:54,974 INFO L231 Difference]: Finished difference. Result has 109 places, 0 transitions, 0 flow [2023-08-26 16:59:54,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=109, PETRI_TRANSITIONS=0} [2023-08-26 16:59:54,975 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 81 predicate places. [2023-08-26 16:59:54,975 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 0 transitions, 0 flow [2023-08-26 16:59:54,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.7) internal successors, (1334), 20 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 16:59:54,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 16:59:54,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:55,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-26 16:59:55,184 INFO L445 BasicCegarLoop]: Path program histogram: [20, 15, 6, 1, 1, 1, 1, 1] [2023-08-26 16:59:55,186 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 16:59:55,186 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 16:59:55,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:59:55 BasicIcfg [2023-08-26 16:59:55,188 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 16:59:55,188 INFO L158 Benchmark]: Toolchain (without parser) took 58534.77ms. Allocated memory was 394.3MB in the beginning and 570.4MB in the end (delta: 176.2MB). Free memory was 372.0MB in the beginning and 443.9MB in the end (delta: -71.9MB). Peak memory consumption was 108.5MB. Max. memory is 16.0GB. [2023-08-26 16:59:55,188 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 394.3MB. Free memory was 371.2MB in the beginning and 371.2MB in the end (delta: 74.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:59:55,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.07ms. Allocated memory is still 394.3MB. Free memory was 371.7MB in the beginning and 360.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 16:59:55,189 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.33ms. Allocated memory is still 394.3MB. Free memory was 360.9MB in the beginning and 359.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 16:59:55,189 INFO L158 Benchmark]: Boogie Preprocessor took 20.08ms. Allocated memory is still 394.3MB. Free memory was 359.1MB in the beginning and 358.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:59:55,189 INFO L158 Benchmark]: RCFGBuilder took 458.71ms. Allocated memory is still 394.3MB. Free memory was 358.0MB in the beginning and 341.3MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 16:59:55,189 INFO L158 Benchmark]: TraceAbstraction took 57831.32ms. Allocated memory was 394.3MB in the beginning and 570.4MB in the end (delta: 176.2MB). Free memory was 340.6MB in the beginning and 443.9MB in the end (delta: -103.3MB). Peak memory consumption was 77.0MB. Max. memory is 16.0GB. [2023-08-26 16:59:55,190 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 394.3MB. Free memory was 371.2MB in the beginning and 371.2MB in the end (delta: 74.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 189.07ms. Allocated memory is still 394.3MB. Free memory was 371.7MB in the beginning and 360.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.33ms. Allocated memory is still 394.3MB. Free memory was 360.9MB in the beginning and 359.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.08ms. Allocated memory is still 394.3MB. Free memory was 359.1MB in the beginning and 358.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 458.71ms. Allocated memory is still 394.3MB. Free memory was 358.0MB in the beginning and 341.3MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 57831.32ms. Allocated memory was 394.3MB in the beginning and 570.4MB in the end (delta: 176.2MB). Free memory was 340.6MB in the beginning and 443.9MB in the end (delta: -103.3MB). Peak memory consumption was 77.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 85 PlacesBefore, 28 PlacesAfterwards, 84 TransitionsBefore, 23 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 6 FixpointIterations, 45 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 85 TotalNumberOfCompositions, 769 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 758, independent: 756, independent conditional: 0, independent unconditional: 756, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 394, independent: 393, independent conditional: 0, independent unconditional: 393, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 758, independent: 363, independent conditional: 0, independent unconditional: 363, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 394, unknown conditional: 0, unknown unconditional: 394] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -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: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 112 locations, 11 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: 57.7s, OverallIterations: 46, TraceHistogramMax: 4, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 25.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3263 SdHoareTripleChecker+Valid, 9.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3263 mSDsluCounter, 639 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 484 mSDsCounter, 846 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17761 IncrementalHoareTripleChecker+Invalid, 18607 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 846 mSolverCounterUnsat, 155 mSDtfsCounter, 17761 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1775 GetRequests, 571 SyntacticMatches, 50 SemanticMatches, 1154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11523 ImplicationChecksByTransitivity, 18.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4425occurred in iteration=42, InterpolantAutomatonStates: 888, 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: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 18.3s InterpolantComputationTime, 1185 NumberOfCodeBlocks, 1185 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 1614 ConstructedInterpolants, 0 QuantifiedInterpolants, 20528 SizeOfPredicates, 70 NumberOfNonLiveVariables, 4850 ConjunctsInSsa, 895 ConjunctsInUnsatCore, 116 InterpolantComputations, 11 PerfectInterpolantSequences, 24/432 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 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 16:59:55,203 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...