/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 PROGRAM_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-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:07:55,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:07:55,326 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 20:07:55,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:07:55,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:07:55,349 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:07:55,350 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:07:55,351 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:07:55,351 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:07:55,351 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:07:55,352 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:07:55,352 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:07:55,352 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:07:55,353 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:07:55,353 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:07:55,353 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:07:55,354 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:07:55,354 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:07:55,354 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:07:55,354 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:07:55,355 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:07:55,355 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:07:55,355 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:07:55,356 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:07:55,356 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:07:55,357 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:07:55,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:07:55,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:07:55,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:07:55,358 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:07:55,358 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:07:55,358 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:07:55,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:07:55,359 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:07:55,359 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:07:55,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:07:55,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:07:55,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:07:55,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:07:55,663 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:07:55,663 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:07:55,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-26 20:07:56,806 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:07:56,949 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:07:56,949 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-26 20:07:56,958 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9943a5dd/5003611cfa34431a8100dae9bcf99d1d/FLAGa965ef6cd [2023-08-26 20:07:56,968 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9943a5dd/5003611cfa34431a8100dae9bcf99d1d [2023-08-26 20:07:56,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:07:56,971 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:07:56,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:07:56,972 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:07:56,975 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:07:56,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:07:56" (1/1) ... [2023-08-26 20:07:56,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5fce5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:56, skipping insertion in model container [2023-08-26 20:07:56,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:07:56" (1/1) ... [2023-08-26 20:07:56,995 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:07:57,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:07:57,133 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:07:57,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:07:57,156 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:07:57,156 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:07:57,162 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:07:57,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57 WrapperNode [2023-08-26 20:07:57,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:07:57,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:07:57,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:07:57,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:07:57,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,191 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 59 [2023-08-26 20:07:57,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:07:57,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:07:57,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:07:57,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:07:57,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,201 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,205 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:07:57,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:07:57,213 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:07:57,213 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:07:57,213 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (1/1) ... [2023-08-26 20:07:57,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:07:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:07:57,258 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 20:07:57,281 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 20:07:57,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:07:57,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:07:57,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:07:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:07:57,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:07:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:07:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:07:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:07:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:07:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:07:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:07:57,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:07:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:07:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:07:57,301 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 20:07:57,407 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:07:57,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:07:57,653 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:07:57,678 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:07:57,678 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 20:07:57,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:07:57 BoogieIcfgContainer [2023-08-26 20:07:57,681 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:07:57,682 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:07:57,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:07:57,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:07:57,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:07:56" (1/3) ... [2023-08-26 20:07:57,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cc1368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:07:57, skipping insertion in model container [2023-08-26 20:07:57,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:07:57" (2/3) ... [2023-08-26 20:07:57,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cc1368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:07:57, skipping insertion in model container [2023-08-26 20:07:57,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:07:57" (3/3) ... [2023-08-26 20:07:57,688 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-26 20:07:57,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:07:57,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 20:07:57,704 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:07:57,764 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 20:07:57,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2023-08-26 20:07:57,867 INFO L124 PetriNetUnfolderBase]: 6/87 cut-off events. [2023-08-26 20:07:57,868 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:07:57,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-26 20:07:57,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2023-08-26 20:07:57,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2023-08-26 20:07:57,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:07:57,899 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 78 transitions, 168 flow [2023-08-26 20:07:57,902 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 78 transitions, 168 flow [2023-08-26 20:07:57,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 78 transitions, 168 flow [2023-08-26 20:07:57,935 INFO L124 PetriNetUnfolderBase]: 6/78 cut-off events. [2023-08-26 20:07:57,935 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:07:57,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-26 20:07:57,937 INFO L119 LiptonReduction]: Number of co-enabled transitions 580 [2023-08-26 20:08:00,436 INFO L134 LiptonReduction]: Checked pairs total: 672 [2023-08-26 20:08:00,436 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-26 20:08:00,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:08:00,465 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;@4b44411e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:08:00,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 20:08:00,466 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:08:00,466 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 20:08:00,467 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:08:00,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:00,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:08:00,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:08:00,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash 351, now seen corresponding path program 1 times [2023-08-26 20:08:00,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:00,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62352663] [2023-08-26 20:08:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:00,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:00,566 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 20:08:00,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:00,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62352663] [2023-08-26 20:08:00,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62352663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:08:00,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:08:00,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:08:00,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72043122] [2023-08-26 20:08:00,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:08:00,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:08:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:08:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:08:00,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 171 [2023-08-26 20:08:00,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:00,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 171 [2023-08-26 20:08:00,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:00,695 INFO L124 PetriNetUnfolderBase]: 100/163 cut-off events. [2023-08-26 20:08:00,695 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:08:00,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 505 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-26 20:08:00,699 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 20:08:00,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-26 20:08:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:08:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:08:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2023-08-26 20:08:00,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233918128654971 [2023-08-26 20:08:00,713 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2023-08-26 20:08:00,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2023-08-26 20:08:00,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:00,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2023-08-26 20:08:00,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,728 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,730 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 2 states and 179 transitions. [2023-08-26 20:08:00,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-26 20:08:00,733 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 20:08:00,734 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-26 20:08:00,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, 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 20:08:00,739 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 20:08:00,739 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-26 20:08:00,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:00,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:08:00,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:08:00,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:08:00,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 345888, now seen corresponding path program 1 times [2023-08-26 20:08:00,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:00,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518500621] [2023-08-26 20:08:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:00,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:00,916 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 20:08:00,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518500621] [2023-08-26 20:08:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518500621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:08:00,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:08:00,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:08:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408532846] [2023-08-26 20:08:00,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:08:00,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:08:00,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:00,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:08:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:08:00,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 171 [2023-08-26 20:08:00,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:00,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 171 [2023-08-26 20:08:00,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:00,958 INFO L124 PetriNetUnfolderBase]: 93/150 cut-off events. [2023-08-26 20:08:00,958 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:08:00,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 460 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-26 20:08:00,959 INFO L140 encePairwiseOnDemand]: 168/171 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 20:08:00,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-26 20:08:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:08:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:08:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-08-26 20:08:00,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38791423001949316 [2023-08-26 20:08:00,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-08-26 20:08:00,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-08-26 20:08:00,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:00,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-08-26 20:08:00,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,965 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 199 transitions. [2023-08-26 20:08:00,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-26 20:08:00,965 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 20:08:00,966 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-26 20:08:00,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, 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 20:08:00,967 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 20:08:00,967 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-26 20:08:00,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:00,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:00,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:08:00,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:08:00,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:08:00,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash 345887, now seen corresponding path program 1 times [2023-08-26 20:08:00,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:00,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250280759] [2023-08-26 20:08:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:00,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:01,049 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 20:08:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250280759] [2023-08-26 20:08:01,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250280759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:08:01,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:08:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:08:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136240994] [2023-08-26 20:08:01,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:08:01,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:08:01,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:08:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:08:01,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:08:01,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 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 20:08:01,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:01,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:08:01,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:01,083 INFO L124 PetriNetUnfolderBase]: 86/137 cut-off events. [2023-08-26 20:08:01,083 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:08:01,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 406 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-26 20:08:01,084 INFO L140 encePairwiseOnDemand]: 168/171 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 20:08:01,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-26 20:08:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:08:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:08:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-08-26 20:08:01,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39571150097465885 [2023-08-26 20:08:01,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-08-26 20:08:01,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-08-26 20:08:01,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:01,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-08-26 20:08:01,087 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 20:08:01,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,089 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 203 transitions. [2023-08-26 20:08:01,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-26 20:08:01,089 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 20:08:01,090 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-26 20:08:01,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, 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 20:08:01,091 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 20:08:01,091 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-26 20:08:01,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 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 20:08:01,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:01,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:08:01,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:08:01,092 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 20:08:01,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash 332406985, now seen corresponding path program 1 times [2023-08-26 20:08:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:01,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424534564] [2023-08-26 20:08:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:01,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:01,170 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 20:08:01,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:01,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424534564] [2023-08-26 20:08:01,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424534564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:08:01,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:08:01,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:08:01,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085807382] [2023-08-26 20:08:01,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:08:01,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:08:01,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:08:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:08:01,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 171 [2023-08-26 20:08:01,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:01,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 171 [2023-08-26 20:08:01,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:01,208 INFO L124 PetriNetUnfolderBase]: 65/107 cut-off events. [2023-08-26 20:08:01,208 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:08:01,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 282 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-26 20:08:01,210 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 20:08:01,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-26 20:08:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:08:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:08:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-08-26 20:08:01,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36257309941520466 [2023-08-26 20:08:01,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-08-26 20:08:01,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-08-26 20:08:01,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:01,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-08-26 20:08:01,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,216 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 186 transitions. [2023-08-26 20:08:01,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-26 20:08:01,216 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 20:08:01,217 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-26 20:08:01,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, 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 20:08:01,218 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 20:08:01,219 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-26 20:08:01,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:01,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:08:01,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:08:01,219 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 20:08:01,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash 332406984, now seen corresponding path program 1 times [2023-08-26 20:08:01,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:01,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458007694] [2023-08-26 20:08:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:01,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:01,382 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 20:08:01,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:01,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458007694] [2023-08-26 20:08:01,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458007694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:08:01,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:08:01,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:08:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037655955] [2023-08-26 20:08:01,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:08:01,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:08:01,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:01,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:08:01,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:08:01,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 171 [2023-08-26 20:08:01,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:01,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 171 [2023-08-26 20:08:01,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:01,408 INFO L124 PetriNetUnfolderBase]: 44/77 cut-off events. [2023-08-26 20:08:01,408 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:08:01,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 169 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-26 20:08:01,409 INFO L140 encePairwiseOnDemand]: 169/171 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 20:08:01,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-26 20:08:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:08:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:08:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-08-26 20:08:01,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3664717348927875 [2023-08-26 20:08:01,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-08-26 20:08:01,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-08-26 20:08:01,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:01,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-08-26 20:08:01,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,413 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 188 transitions. [2023-08-26 20:08:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-26 20:08:01,414 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 20:08:01,414 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 20:08:01,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, 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 20:08:01,415 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 20:08:01,415 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 20:08:01,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:01,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:01,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:08:01,416 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 20:08:01,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:01,416 INFO L85 PathProgramCache]: Analyzing trace with hash -859686374, now seen corresponding path program 1 times [2023-08-26 20:08:01,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:01,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195734166] [2023-08-26 20:08:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:01,563 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 20:08:01,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:01,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195734166] [2023-08-26 20:08:01,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195734166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:08:01,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:08:01,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:08:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160901258] [2023-08-26 20:08:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:08:01,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:08:01,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:08:01,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:08:01,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 171 [2023-08-26 20:08:01,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:01,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 171 [2023-08-26 20:08:01,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:01,606 INFO L124 PetriNetUnfolderBase]: 54/95 cut-off events. [2023-08-26 20:08:01,606 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:08:01,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 95 events. 54/95 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 242 event pairs, 20 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 197. Up to 73 conditions per place. [2023-08-26 20:08:01,607 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-26 20:08:01,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-08-26 20:08:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:08:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:08:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 293 transitions. [2023-08-26 20:08:01,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283625730994152 [2023-08-26 20:08:01,609 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 293 transitions. [2023-08-26 20:08:01,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 293 transitions. [2023-08-26 20:08:01,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:01,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 293 transitions. [2023-08-26 20:08:01,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,612 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,612 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 293 transitions. [2023-08-26 20:08:01,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-08-26 20:08:01,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:08:01,613 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-08-26 20:08:01,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, 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=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-26 20:08:01,614 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-08-26 20:08:01,614 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-08-26 20:08:01,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:01,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:01,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:08:01,615 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 20:08:01,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1175690569, now seen corresponding path program 1 times [2023-08-26 20:08:01,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:01,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544281249] [2023-08-26 20:08:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:01,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:01,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544281249] [2023-08-26 20:08:01,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544281249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:08:01,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:08:01,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:08:01,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498330128] [2023-08-26 20:08:01,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:08:01,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:08:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:08:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:08:01,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-26 20:08:01,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:01,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-26 20:08:01,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:01,769 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-08-26 20:08:01,770 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-26 20:08:01,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 116 events. 65/116 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 282 event pairs, 24 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 292. Up to 73 conditions per place. [2023-08-26 20:08:01,771 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 23 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2023-08-26 20:08:01,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 160 flow [2023-08-26 20:08:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:08:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:08:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 436 transitions. [2023-08-26 20:08:01,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249512670565302 [2023-08-26 20:08:01,773 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 436 transitions. [2023-08-26 20:08:01,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 436 transitions. [2023-08-26 20:08:01,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:01,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 436 transitions. [2023-08-26 20:08:01,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.66666666666667) internal successors, (436), 6 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,776 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,777 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 6 states and 436 transitions. [2023-08-26 20:08:01,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 160 flow [2023-08-26 20:08:01,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 32 transitions, 150 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 20:08:01,778 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 92 flow [2023-08-26 20:08:01,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-08-26 20:08:01,779 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-08-26 20:08:01,779 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 92 flow [2023-08-26 20:08:01,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:01,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:01,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:01,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:08:01,780 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 20:08:01,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1501475574, now seen corresponding path program 1 times [2023-08-26 20:08:01,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:01,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733057528] [2023-08-26 20:08:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:01,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:02,087 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 20:08:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733057528] [2023-08-26 20:08:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733057528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234538054] [2023-08-26 20:08:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:02,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:02,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:02,091 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 20:08:02,100 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 20:08:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:02,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 20:08:02,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:02,271 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 20:08:02,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:02,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234538054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:02,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:02,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 2] total 9 [2023-08-26 20:08:02,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106764503] [2023-08-26 20:08:02,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:02,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 20:08:02,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 20:08:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-08-26 20:08:02,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:08:02,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 92 flow. Second operand has 11 states, 11 states have (on average 65.36363636363636) internal successors, (719), 11 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:02,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:02,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:08:02,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:02,664 INFO L124 PetriNetUnfolderBase]: 165/298 cut-off events. [2023-08-26 20:08:02,665 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-26 20:08:02,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 298 events. 165/298 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1069 event pairs, 7 based on Foata normal form. 2/230 useless extension candidates. Maximal degree in co-relation 922. Up to 97 conditions per place. [2023-08-26 20:08:02,668 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 55 selfloop transitions, 19 changer transitions 14/88 dead transitions. [2023-08-26 20:08:02,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 88 transitions, 510 flow [2023-08-26 20:08:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 20:08:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 20:08:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 766 transitions. [2023-08-26 20:08:02,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072301967038809 [2023-08-26 20:08:02,672 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 766 transitions. [2023-08-26 20:08:02,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 766 transitions. [2023-08-26 20:08:02,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:02,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 766 transitions. [2023-08-26 20:08:02,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 69.63636363636364) internal successors, (766), 11 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:02,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:02,682 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:02,682 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 92 flow. Second operand 11 states and 766 transitions. [2023-08-26 20:08:02,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 88 transitions, 510 flow [2023-08-26 20:08:02,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 88 transitions, 493 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 20:08:02,686 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 222 flow [2023-08-26 20:08:02,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=222, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-26 20:08:02,687 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 15 predicate places. [2023-08-26 20:08:02,687 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 222 flow [2023-08-26 20:08:02,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 65.36363636363636) internal successors, (719), 11 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:02,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:02,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:02,697 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 20:08:02,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:02,893 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 20:08:02,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:02,893 INFO L85 PathProgramCache]: Analyzing trace with hash -339586952, now seen corresponding path program 2 times [2023-08-26 20:08:02,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:02,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101369311] [2023-08-26 20:08:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:02,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:08:03,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:03,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101369311] [2023-08-26 20:08:03,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101369311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:03,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678091867] [2023-08-26 20:08:03,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:08:03,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:03,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:03,037 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 20:08:03,094 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 20:08:03,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:08:03,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:03,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 20:08:03,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:08:03,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:08:03,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678091867] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:03,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:03,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-26 20:08:03,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924559565] [2023-08-26 20:08:03,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:03,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 20:08:03,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 20:08:03,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 20:08:03,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 171 [2023-08-26 20:08:03,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 222 flow. Second operand has 8 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:03,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:03,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 171 [2023-08-26 20:08:03,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:03,377 INFO L124 PetriNetUnfolderBase]: 164/294 cut-off events. [2023-08-26 20:08:03,377 INFO L125 PetriNetUnfolderBase]: For 717/719 co-relation queries the response was YES. [2023-08-26 20:08:03,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 294 events. 164/294 cut-off events. For 717/719 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 997 event pairs, 32 based on Foata normal form. 18/311 useless extension candidates. Maximal degree in co-relation 1109. Up to 233 conditions per place. [2023-08-26 20:08:03,379 INFO L140 encePairwiseOnDemand]: 166/171 looper letters, 38 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-08-26 20:08:03,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 395 flow [2023-08-26 20:08:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:08:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:08:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2023-08-26 20:08:03,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-08-26 20:08:03,381 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2023-08-26 20:08:03,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2023-08-26 20:08:03,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:03,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2023-08-26 20:08:03,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:03,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:03,384 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:03,385 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 222 flow. Second operand 6 states and 441 transitions. [2023-08-26 20:08:03,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 395 flow [2023-08-26 20:08:03,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 388 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 20:08:03,389 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 290 flow [2023-08-26 20:08:03,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-26 20:08:03,390 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-08-26 20:08:03,390 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 290 flow [2023-08-26 20:08:03,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:03,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:03,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:03,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 20:08:03,595 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,SelfDestructingSolverStorable8 [2023-08-26 20:08:03,596 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 20:08:03,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2043790409, now seen corresponding path program 3 times [2023-08-26 20:08:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:03,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220108617] [2023-08-26 20:08:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:03,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:03,817 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 20:08:03,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:03,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220108617] [2023-08-26 20:08:03,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220108617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:03,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75655384] [2023-08-26 20:08:03,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:08:03,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:03,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:03,819 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 20:08:03,822 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 20:08:03,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 20:08:03,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:03,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 20:08:03,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:04,022 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 20:08:04,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:04,176 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 20:08:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75655384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:04,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:04,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-26 20:08:04,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010717246] [2023-08-26 20:08:04,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:04,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:08:04,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:04,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:08:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:08:04,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:08:04,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 290 flow. Second operand has 14 states, 14 states have (on average 66.35714285714286) internal successors, (929), 14 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:04,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:04,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:08:04,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:04,768 INFO L124 PetriNetUnfolderBase]: 269/461 cut-off events. [2023-08-26 20:08:04,768 INFO L125 PetriNetUnfolderBase]: For 1640/1640 co-relation queries the response was YES. [2023-08-26 20:08:04,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 461 events. 269/461 cut-off events. For 1640/1640 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1769 event pairs, 3 based on Foata normal form. 14/475 useless extension candidates. Maximal degree in co-relation 1947. Up to 153 conditions per place. [2023-08-26 20:08:04,772 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 65 selfloop transitions, 52 changer transitions 20/137 dead transitions. [2023-08-26 20:08:04,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 137 transitions, 1118 flow [2023-08-26 20:08:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 20:08:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 20:08:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1456 transitions. [2023-08-26 20:08:04,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40545808966861596 [2023-08-26 20:08:04,777 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1456 transitions. [2023-08-26 20:08:04,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1456 transitions. [2023-08-26 20:08:04,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:04,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1456 transitions. [2023-08-26 20:08:04,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 69.33333333333333) internal successors, (1456), 21 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:04,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 171.0) internal successors, (3762), 22 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:04,786 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 171.0) internal successors, (3762), 22 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:04,786 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 290 flow. Second operand 21 states and 1456 transitions. [2023-08-26 20:08:04,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 137 transitions, 1118 flow [2023-08-26 20:08:04,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 137 transitions, 1082 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-26 20:08:04,793 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 675 flow [2023-08-26 20:08:04,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=675, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-08-26 20:08:04,793 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2023-08-26 20:08:04,794 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 675 flow [2023-08-26 20:08:04,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 66.35714285714286) internal successors, (929), 14 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:04,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:04,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:04,803 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 20:08:05,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:05,001 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 20:08:05,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:05,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1957774117, now seen corresponding path program 4 times [2023-08-26 20:08:05,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:05,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259951350] [2023-08-26 20:08:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:05,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:05,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:05,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259951350] [2023-08-26 20:08:05,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259951350] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:05,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575164942] [2023-08-26 20:08:05,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:08:05,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:05,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:05,223 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 20:08:05,233 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 20:08:05,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:08:05,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:05,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 20:08:05,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:05,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:05,533 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 20:08:05,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575164942] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:05,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:05,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 20:08:05,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22016871] [2023-08-26 20:08:05,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:05,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 20:08:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:05,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 20:08:05,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-26 20:08:05,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:08:05,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 675 flow. Second operand has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:05,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:05,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:08:05,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:06,129 INFO L124 PetriNetUnfolderBase]: 290/488 cut-off events. [2023-08-26 20:08:06,129 INFO L125 PetriNetUnfolderBase]: For 5415/5415 co-relation queries the response was YES. [2023-08-26 20:08:06,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2815 conditions, 488 events. 290/488 cut-off events. For 5415/5415 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1812 event pairs, 6 based on Foata normal form. 22/510 useless extension candidates. Maximal degree in co-relation 2793. Up to 171 conditions per place. [2023-08-26 20:08:06,134 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 87 selfloop transitions, 71 changer transitions 1/159 dead transitions. [2023-08-26 20:08:06,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 159 transitions, 1731 flow [2023-08-26 20:08:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 20:08:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 20:08:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1454 transitions. [2023-08-26 20:08:06,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404901141743247 [2023-08-26 20:08:06,139 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1454 transitions. [2023-08-26 20:08:06,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1454 transitions. [2023-08-26 20:08:06,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:06,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1454 transitions. [2023-08-26 20:08:06,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 69.23809523809524) internal successors, (1454), 21 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:06,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 171.0) internal successors, (3762), 22 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:06,148 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 171.0) internal successors, (3762), 22 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:06,148 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 675 flow. Second operand 21 states and 1454 transitions. [2023-08-26 20:08:06,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 159 transitions, 1731 flow [2023-08-26 20:08:06,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 159 transitions, 1435 flow, removed 141 selfloop flow, removed 5 redundant places. [2023-08-26 20:08:06,164 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 1164 flow [2023-08-26 20:08:06,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1164, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2023-08-26 20:08:06,165 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 71 predicate places. [2023-08-26 20:08:06,165 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 1164 flow [2023-08-26 20:08:06,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:06,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:06,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:06,180 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 20:08:06,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:06,374 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 20:08:06,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1810301909, now seen corresponding path program 5 times [2023-08-26 20:08:06,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:06,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43075209] [2023-08-26 20:08:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:06,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43075209] [2023-08-26 20:08:06,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43075209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816361055] [2023-08-26 20:08:06,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 20:08:06,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:06,583 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 20:08:06,610 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 20:08:06,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:08:06,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:06,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 20:08:06,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:06,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:06,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816361055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:06,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:06,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-08-26 20:08:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640366278] [2023-08-26 20:08:06,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:06,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 20:08:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 20:08:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-26 20:08:06,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-26 20:08:06,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 1164 flow. Second operand has 15 states, 15 states have (on average 68.8) internal successors, (1032), 15 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:06,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:06,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-26 20:08:06,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:07,953 INFO L124 PetriNetUnfolderBase]: 407/747 cut-off events. [2023-08-26 20:08:07,953 INFO L125 PetriNetUnfolderBase]: For 14408/14408 co-relation queries the response was YES. [2023-08-26 20:08:07,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4606 conditions, 747 events. 407/747 cut-off events. For 14408/14408 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3486 event pairs, 16 based on Foata normal form. 24/771 useless extension candidates. Maximal degree in co-relation 4576. Up to 237 conditions per place. [2023-08-26 20:08:07,961 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 112 selfloop transitions, 110 changer transitions 5/227 dead transitions. [2023-08-26 20:08:07,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 227 transitions, 2604 flow [2023-08-26 20:08:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 20:08:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 20:08:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1723 transitions. [2023-08-26 20:08:07,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198343079922027 [2023-08-26 20:08:07,966 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1723 transitions. [2023-08-26 20:08:07,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1723 transitions. [2023-08-26 20:08:07,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:07,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1723 transitions. [2023-08-26 20:08:07,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 71.79166666666667) internal successors, (1723), 24 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:07,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:07,976 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:07,976 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 1164 flow. Second operand 24 states and 1723 transitions. [2023-08-26 20:08:07,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 227 transitions, 2604 flow [2023-08-26 20:08:08,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 227 transitions, 2235 flow, removed 181 selfloop flow, removed 2 redundant places. [2023-08-26 20:08:08,005 INFO L231 Difference]: Finished difference. Result has 128 places, 152 transitions, 1761 flow [2023-08-26 20:08:08,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1761, PETRI_PLACES=128, PETRI_TRANSITIONS=152} [2023-08-26 20:08:08,005 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 100 predicate places. [2023-08-26 20:08:08,005 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 152 transitions, 1761 flow [2023-08-26 20:08:08,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 68.8) internal successors, (1032), 15 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:08,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:08,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:08,018 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 20:08:08,210 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,SelfDestructingSolverStorable11 [2023-08-26 20:08:08,211 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 20:08:08,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1626980149, now seen corresponding path program 6 times [2023-08-26 20:08:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:08,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771205983] [2023-08-26 20:08:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:08,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:08,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771205983] [2023-08-26 20:08:08,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771205983] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:08,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131725239] [2023-08-26 20:08:08,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 20:08:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:08,413 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 20:08:08,439 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 20:08:08,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 20:08:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:08,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 20:08:08,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:08,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:08,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131725239] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:08,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:08,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2023-08-26 20:08:08,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372210273] [2023-08-26 20:08:08,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:08,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:08:08,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:08,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:08:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:08:08,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-26 20:08:08,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 152 transitions, 1761 flow. Second operand has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:08,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:08,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-26 20:08:08,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:09,144 INFO L124 PetriNetUnfolderBase]: 371/670 cut-off events. [2023-08-26 20:08:09,144 INFO L125 PetriNetUnfolderBase]: For 9374/9374 co-relation queries the response was YES. [2023-08-26 20:08:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4235 conditions, 670 events. 371/670 cut-off events. For 9374/9374 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3037 event pairs, 53 based on Foata normal form. 6/676 useless extension candidates. Maximal degree in co-relation 4196. Up to 321 conditions per place. [2023-08-26 20:08:09,152 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 88 selfloop transitions, 89 changer transitions 3/180 dead transitions. [2023-08-26 20:08:09,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 2243 flow [2023-08-26 20:08:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 20:08:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 20:08:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1146 transitions. [2023-08-26 20:08:09,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41885964912280704 [2023-08-26 20:08:09,155 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1146 transitions. [2023-08-26 20:08:09,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1146 transitions. [2023-08-26 20:08:09,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:09,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1146 transitions. [2023-08-26 20:08:09,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 71.625) internal successors, (1146), 16 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:09,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:09,164 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:09,164 INFO L175 Difference]: Start difference. First operand has 128 places, 152 transitions, 1761 flow. Second operand 16 states and 1146 transitions. [2023-08-26 20:08:09,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 2243 flow [2023-08-26 20:08:09,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 180 transitions, 1927 flow, removed 129 selfloop flow, removed 8 redundant places. [2023-08-26 20:08:09,204 INFO L231 Difference]: Finished difference. Result has 134 places, 147 transitions, 1577 flow [2023-08-26 20:08:09,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1577, PETRI_PLACES=134, PETRI_TRANSITIONS=147} [2023-08-26 20:08:09,205 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 106 predicate places. [2023-08-26 20:08:09,205 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 147 transitions, 1577 flow [2023-08-26 20:08:09,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:09,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:09,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:09,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 20:08:09,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:09,411 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 20:08:09,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1739120595, now seen corresponding path program 7 times [2023-08-26 20:08:09,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:09,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209003765] [2023-08-26 20:08:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:09,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:09,630 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 20:08:09,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:09,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209003765] [2023-08-26 20:08:09,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209003765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:09,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157945589] [2023-08-26 20:08:09,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 20:08:09,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:09,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:09,633 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 20:08:09,661 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 20:08:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:09,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 20:08:09,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:09,795 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 20:08:09,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:09,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157945589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:09,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:09,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-26 20:08:09,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688425432] [2023-08-26 20:08:09,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:09,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:08:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:08:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:08:09,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-26 20:08:09,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 147 transitions, 1577 flow. Second operand has 14 states, 14 states have (on average 69.42857142857143) internal successors, (972), 14 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:09,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:09,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-26 20:08:09,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:10,795 INFO L124 PetriNetUnfolderBase]: 443/818 cut-off events. [2023-08-26 20:08:10,795 INFO L125 PetriNetUnfolderBase]: For 9226/9226 co-relation queries the response was YES. [2023-08-26 20:08:10,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4961 conditions, 818 events. 443/818 cut-off events. For 9226/9226 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3899 event pairs, 99 based on Foata normal form. 28/846 useless extension candidates. Maximal degree in co-relation 4925. Up to 551 conditions per place. [2023-08-26 20:08:10,804 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 139 selfloop transitions, 87 changer transitions 3/229 dead transitions. [2023-08-26 20:08:10,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 229 transitions, 2838 flow [2023-08-26 20:08:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 20:08:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 20:08:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1301 transitions. [2023-08-26 20:08:10,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226770630279402 [2023-08-26 20:08:10,807 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1301 transitions. [2023-08-26 20:08:10,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1301 transitions. [2023-08-26 20:08:10,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:10,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1301 transitions. [2023-08-26 20:08:10,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 72.27777777777777) internal successors, (1301), 18 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:10,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 171.0) internal successors, (3249), 19 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:10,813 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 171.0) internal successors, (3249), 19 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:10,813 INFO L175 Difference]: Start difference. First operand has 134 places, 147 transitions, 1577 flow. Second operand 18 states and 1301 transitions. [2023-08-26 20:08:10,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 229 transitions, 2838 flow [2023-08-26 20:08:10,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 229 transitions, 2700 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-26 20:08:10,839 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2322 flow [2023-08-26 20:08:10,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2322, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2023-08-26 20:08:10,840 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 119 predicate places. [2023-08-26 20:08:10,840 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2322 flow [2023-08-26 20:08:10,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.42857142857143) internal successors, (972), 14 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:10,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:10,840 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:10,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 20:08:11,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:11,051 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 20:08:11,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:11,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2097055791, now seen corresponding path program 8 times [2023-08-26 20:08:11,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:11,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954927609] [2023-08-26 20:08:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:11,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:11,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:11,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954927609] [2023-08-26 20:08:11,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954927609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:11,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391544093] [2023-08-26 20:08:11,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:08:11,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:11,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:11,189 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 20:08:11,212 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 20:08:11,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:08:11,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:11,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 20:08:11,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:11,360 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 20:08:11,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:11,481 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 20:08:11,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391544093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:11,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:11,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-08-26 20:08:11,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522628475] [2023-08-26 20:08:11,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:11,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 20:08:11,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 20:08:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-26 20:08:11,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:08:11,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 2322 flow. Second operand has 16 states, 16 states have (on average 66.0625) internal successors, (1057), 16 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:11,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:11,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:08:11,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:12,331 INFO L124 PetriNetUnfolderBase]: 632/1149 cut-off events. [2023-08-26 20:08:12,331 INFO L125 PetriNetUnfolderBase]: For 18647/18647 co-relation queries the response was YES. [2023-08-26 20:08:12,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8093 conditions, 1149 events. 632/1149 cut-off events. For 18647/18647 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5966 event pairs, 22 based on Foata normal form. 30/1179 useless extension candidates. Maximal degree in co-relation 8050. Up to 645 conditions per place. [2023-08-26 20:08:12,345 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 186 selfloop transitions, 149 changer transitions 6/341 dead transitions. [2023-08-26 20:08:12,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 341 transitions, 4975 flow [2023-08-26 20:08:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 20:08:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 20:08:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2007 transitions. [2023-08-26 20:08:12,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4047186932849365 [2023-08-26 20:08:12,349 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2007 transitions. [2023-08-26 20:08:12,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2007 transitions. [2023-08-26 20:08:12,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:12,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2007 transitions. [2023-08-26 20:08:12,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 69.20689655172414) internal successors, (2007), 29 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:12,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 171.0) internal successors, (5130), 30 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:12,359 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 171.0) internal successors, (5130), 30 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:12,359 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2322 flow. Second operand 29 states and 2007 transitions. [2023-08-26 20:08:12,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 341 transitions, 4975 flow [2023-08-26 20:08:12,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 341 transitions, 4410 flow, removed 262 selfloop flow, removed 5 redundant places. [2023-08-26 20:08:12,420 INFO L231 Difference]: Finished difference. Result has 185 places, 256 transitions, 3734 flow [2023-08-26 20:08:12,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3734, PETRI_PLACES=185, PETRI_TRANSITIONS=256} [2023-08-26 20:08:12,421 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 157 predicate places. [2023-08-26 20:08:12,421 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 256 transitions, 3734 flow [2023-08-26 20:08:12,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 66.0625) internal successors, (1057), 16 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:12,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:12,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:12,428 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 20:08:12,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 20:08:12,628 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 20:08:12,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2138577967, now seen corresponding path program 9 times [2023-08-26 20:08:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:12,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402732422] [2023-08-26 20:08:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:12,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:12,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402732422] [2023-08-26 20:08:12,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402732422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:12,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136536846] [2023-08-26 20:08:12,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:08:12,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:12,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:12,767 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 20:08:12,790 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 20:08:12,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 20:08:12,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:12,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 20:08:12,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:12,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:13,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136536846] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:13,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:13,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2023-08-26 20:08:13,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729029394] [2023-08-26 20:08:13,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:13,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 20:08:13,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 20:08:13,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-08-26 20:08:13,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-26 20:08:13,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 256 transitions, 3734 flow. Second operand has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:13,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:13,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-26 20:08:13,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:13,672 INFO L124 PetriNetUnfolderBase]: 704/1230 cut-off events. [2023-08-26 20:08:13,672 INFO L125 PetriNetUnfolderBase]: For 25432/25432 co-relation queries the response was YES. [2023-08-26 20:08:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 1230 events. 704/1230 cut-off events. For 25432/25432 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6298 event pairs, 134 based on Foata normal form. 22/1252 useless extension candidates. Maximal degree in co-relation 9724. Up to 885 conditions per place. [2023-08-26 20:08:13,693 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 168 selfloop transitions, 141 changer transitions 7/316 dead transitions. [2023-08-26 20:08:13,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 316 transitions, 5397 flow [2023-08-26 20:08:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:08:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:08:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1002 transitions. [2023-08-26 20:08:13,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41854636591478694 [2023-08-26 20:08:13,695 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1002 transitions. [2023-08-26 20:08:13,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1002 transitions. [2023-08-26 20:08:13,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:13,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1002 transitions. [2023-08-26 20:08:13,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.57142857142857) internal successors, (1002), 14 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:13,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 171.0) internal successors, (2565), 15 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:13,701 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 171.0) internal successors, (2565), 15 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:13,701 INFO L175 Difference]: Start difference. First operand has 185 places, 256 transitions, 3734 flow. Second operand 14 states and 1002 transitions. [2023-08-26 20:08:13,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 316 transitions, 5397 flow [2023-08-26 20:08:13,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 316 transitions, 4517 flow, removed 422 selfloop flow, removed 7 redundant places. [2023-08-26 20:08:13,859 INFO L231 Difference]: Finished difference. Result has 197 places, 283 transitions, 4087 flow [2023-08-26 20:08:13,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4087, PETRI_PLACES=197, PETRI_TRANSITIONS=283} [2023-08-26 20:08:13,861 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 169 predicate places. [2023-08-26 20:08:13,861 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 283 transitions, 4087 flow [2023-08-26 20:08:13,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:13,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:13,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:13,875 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 20:08:14,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 20:08:14,072 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 20:08:14,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1874259199, now seen corresponding path program 10 times [2023-08-26 20:08:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:14,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741822802] [2023-08-26 20:08:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:14,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:14,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741822802] [2023-08-26 20:08:14,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741822802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:14,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493451108] [2023-08-26 20:08:14,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:08:14,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:14,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:14,237 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 20:08:14,248 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 20:08:14,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:08:14,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:14,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 20:08:14,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:14,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:14,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493451108] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:14,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:14,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 20:08:14,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739992706] [2023-08-26 20:08:14,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:14,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 20:08:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:14,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 20:08:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-26 20:08:14,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-26 20:08:14,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 283 transitions, 4087 flow. Second operand has 15 states, 15 states have (on average 68.73333333333333) internal successors, (1031), 15 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:14,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:14,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-26 20:08:14,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:15,236 INFO L124 PetriNetUnfolderBase]: 746/1317 cut-off events. [2023-08-26 20:08:15,236 INFO L125 PetriNetUnfolderBase]: For 28193/28193 co-relation queries the response was YES. [2023-08-26 20:08:15,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10163 conditions, 1317 events. 746/1317 cut-off events. For 28193/28193 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6737 event pairs, 134 based on Foata normal form. 28/1345 useless extension candidates. Maximal degree in co-relation 10096. Up to 872 conditions per place. [2023-08-26 20:08:15,257 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 220 selfloop transitions, 136 changer transitions 2/358 dead transitions. [2023-08-26 20:08:15,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 358 transitions, 5619 flow [2023-08-26 20:08:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 20:08:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 20:08:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1652 transitions. [2023-08-26 20:08:15,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42003559623696923 [2023-08-26 20:08:15,260 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1652 transitions. [2023-08-26 20:08:15,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1652 transitions. [2023-08-26 20:08:15,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:15,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1652 transitions. [2023-08-26 20:08:15,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 71.82608695652173) internal successors, (1652), 23 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:15,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:15,268 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:15,268 INFO L175 Difference]: Start difference. First operand has 197 places, 283 transitions, 4087 flow. Second operand 23 states and 1652 transitions. [2023-08-26 20:08:15,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 358 transitions, 5619 flow [2023-08-26 20:08:15,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 358 transitions, 5322 flow, removed 126 selfloop flow, removed 6 redundant places. [2023-08-26 20:08:15,437 INFO L231 Difference]: Finished difference. Result has 218 places, 301 transitions, 4553 flow [2023-08-26 20:08:15,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4553, PETRI_PLACES=218, PETRI_TRANSITIONS=301} [2023-08-26 20:08:15,438 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 190 predicate places. [2023-08-26 20:08:15,438 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 301 transitions, 4553 flow [2023-08-26 20:08:15,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 68.73333333333333) internal successors, (1031), 15 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:15,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:15,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:15,448 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 20:08:15,639 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,SelfDestructingSolverStorable16 [2023-08-26 20:08:15,639 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 20:08:15,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:15,640 INFO L85 PathProgramCache]: Analyzing trace with hash -419951752, now seen corresponding path program 11 times [2023-08-26 20:08:15,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:15,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549798584] [2023-08-26 20:08:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:15,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:15,882 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 20:08:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549798584] [2023-08-26 20:08:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549798584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844329051] [2023-08-26 20:08:15,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 20:08:15,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:15,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:15,884 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 20:08:15,915 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 20:08:15,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 20:08:15,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:15,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 20:08:15,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:16,168 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 20:08:16,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:08:16,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844329051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:16,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:16,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2023-08-26 20:08:16,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403025002] [2023-08-26 20:08:16,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:16,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 20:08:16,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 20:08:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-26 20:08:16,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 171 [2023-08-26 20:08:16,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 301 transitions, 4553 flow. Second operand has 12 states, 12 states have (on average 73.41666666666667) internal successors, (881), 12 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:16,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:16,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 171 [2023-08-26 20:08:16,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:16,982 INFO L124 PetriNetUnfolderBase]: 989/1796 cut-off events. [2023-08-26 20:08:16,982 INFO L125 PetriNetUnfolderBase]: For 37261/37261 co-relation queries the response was YES. [2023-08-26 20:08:16,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14527 conditions, 1796 events. 989/1796 cut-off events. For 37261/37261 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10281 event pairs, 40 based on Foata normal form. 3/1799 useless extension candidates. Maximal degree in co-relation 14454. Up to 873 conditions per place. [2023-08-26 20:08:17,015 INFO L140 encePairwiseOnDemand]: 166/171 looper letters, 279 selfloop transitions, 112 changer transitions 61/455 dead transitions. [2023-08-26 20:08:17,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 455 transitions, 7786 flow [2023-08-26 20:08:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 20:08:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 20:08:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 861 transitions. [2023-08-26 20:08:17,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45773524720893144 [2023-08-26 20:08:17,017 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 861 transitions. [2023-08-26 20:08:17,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 861 transitions. [2023-08-26 20:08:17,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:17,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 861 transitions. [2023-08-26 20:08:17,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.27272727272727) internal successors, (861), 11 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:17,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:17,021 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:17,022 INFO L175 Difference]: Start difference. First operand has 218 places, 301 transitions, 4553 flow. Second operand 11 states and 861 transitions. [2023-08-26 20:08:17,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 455 transitions, 7786 flow [2023-08-26 20:08:17,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 455 transitions, 7182 flow, removed 184 selfloop flow, removed 15 redundant places. [2023-08-26 20:08:17,200 INFO L231 Difference]: Finished difference. Result has 220 places, 329 transitions, 5051 flow [2023-08-26 20:08:17,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=4104, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5051, PETRI_PLACES=220, PETRI_TRANSITIONS=329} [2023-08-26 20:08:17,201 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 192 predicate places. [2023-08-26 20:08:17,201 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 329 transitions, 5051 flow [2023-08-26 20:08:17,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 73.41666666666667) internal successors, (881), 12 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:17,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:17,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:17,209 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 20:08:17,409 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,SelfDestructingSolverStorable17 [2023-08-26 20:08:17,409 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 20:08:17,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash -940291910, now seen corresponding path program 12 times [2023-08-26 20:08:17,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:17,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487032523] [2023-08-26 20:08:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:17,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:08:17,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487032523] [2023-08-26 20:08:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487032523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527137277] [2023-08-26 20:08:17,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 20:08:17,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:17,685 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 20:08:17,715 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 20:08:17,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 20:08:17,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:17,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 20:08:17,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:08:17,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:18,290 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 20:08:18,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527137277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:18,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:18,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 20:08:18,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390876721] [2023-08-26 20:08:18,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:18,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:08:18,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:08:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:08:18,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:08:18,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 329 transitions, 5051 flow. Second operand has 18 states, 18 states have (on average 64.16666666666667) internal successors, (1155), 18 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:18,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:18,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:08:18,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:19,059 INFO L124 PetriNetUnfolderBase]: 927/1742 cut-off events. [2023-08-26 20:08:19,060 INFO L125 PetriNetUnfolderBase]: For 43734/43734 co-relation queries the response was YES. [2023-08-26 20:08:19,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14485 conditions, 1742 events. 927/1742 cut-off events. For 43734/43734 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10240 event pairs, 21 based on Foata normal form. 32/1774 useless extension candidates. Maximal degree in co-relation 14408. Up to 1193 conditions per place. [2023-08-26 20:08:19,085 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 302 selfloop transitions, 97 changer transitions 29/428 dead transitions. [2023-08-26 20:08:19,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 428 transitions, 7466 flow [2023-08-26 20:08:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 20:08:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 20:08:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1219 transitions. [2023-08-26 20:08:19,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39603638726445745 [2023-08-26 20:08:19,088 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1219 transitions. [2023-08-26 20:08:19,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1219 transitions. [2023-08-26 20:08:19,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:19,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1219 transitions. [2023-08-26 20:08:19,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.72222222222223) internal successors, (1219), 18 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:19,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 171.0) internal successors, (3249), 19 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:19,094 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 171.0) internal successors, (3249), 19 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:19,094 INFO L175 Difference]: Start difference. First operand has 220 places, 329 transitions, 5051 flow. Second operand 18 states and 1219 transitions. [2023-08-26 20:08:19,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 428 transitions, 7466 flow [2023-08-26 20:08:19,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 428 transitions, 7282 flow, removed 51 selfloop flow, removed 10 redundant places. [2023-08-26 20:08:19,264 INFO L231 Difference]: Finished difference. Result has 229 places, 350 transitions, 5844 flow [2023-08-26 20:08:19,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=4883, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5844, PETRI_PLACES=229, PETRI_TRANSITIONS=350} [2023-08-26 20:08:19,265 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 201 predicate places. [2023-08-26 20:08:19,265 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 350 transitions, 5844 flow [2023-08-26 20:08:19,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.16666666666667) internal successors, (1155), 18 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:19,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:19,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:19,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 20:08:19,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:19,472 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 20:08:19,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:19,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2021209680, now seen corresponding path program 13 times [2023-08-26 20:08:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:19,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776926672] [2023-08-26 20:08:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:19,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:19,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776926672] [2023-08-26 20:08:19,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776926672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:19,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193014178] [2023-08-26 20:08:19,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 20:08:19,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:19,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:19,718 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 20:08:19,743 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 20:08:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:19,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 20:08:19,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:19,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193014178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:20,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:20,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-26 20:08:20,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054734993] [2023-08-26 20:08:20,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:20,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:08:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:08:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:08:20,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:08:20,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 350 transitions, 5844 flow. Second operand has 18 states, 18 states have (on average 65.77777777777777) internal successors, (1184), 18 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:20,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:20,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:08:20,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:25,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:08:27,855 INFO L124 PetriNetUnfolderBase]: 1101/2007 cut-off events. [2023-08-26 20:08:27,855 INFO L125 PetriNetUnfolderBase]: For 52046/52046 co-relation queries the response was YES. [2023-08-26 20:08:27,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17779 conditions, 2007 events. 1101/2007 cut-off events. For 52046/52046 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 11801 event pairs, 16 based on Foata normal form. 38/2045 useless extension candidates. Maximal degree in co-relation 17702. Up to 873 conditions per place. [2023-08-26 20:08:27,881 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 247 selfloop transitions, 238 changer transitions 5/490 dead transitions. [2023-08-26 20:08:27,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 490 transitions, 9375 flow [2023-08-26 20:08:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 20:08:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 20:08:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1841 transitions. [2023-08-26 20:08:27,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39874377301277886 [2023-08-26 20:08:27,885 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1841 transitions. [2023-08-26 20:08:27,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1841 transitions. [2023-08-26 20:08:27,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:27,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1841 transitions. [2023-08-26 20:08:27,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 68.18518518518519) internal successors, (1841), 27 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:27,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 171.0) internal successors, (4788), 28 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:27,893 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 171.0) internal successors, (4788), 28 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:27,893 INFO L175 Difference]: Start difference. First operand has 229 places, 350 transitions, 5844 flow. Second operand 27 states and 1841 transitions. [2023-08-26 20:08:27,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 490 transitions, 9375 flow [2023-08-26 20:08:28,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 490 transitions, 8480 flow, removed 353 selfloop flow, removed 15 redundant places. [2023-08-26 20:08:28,128 INFO L231 Difference]: Finished difference. Result has 252 places, 421 transitions, 7612 flow [2023-08-26 20:08:28,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=5302, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7612, PETRI_PLACES=252, PETRI_TRANSITIONS=421} [2023-08-26 20:08:28,129 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 224 predicate places. [2023-08-26 20:08:28,129 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 421 transitions, 7612 flow [2023-08-26 20:08:28,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.77777777777777) internal successors, (1184), 18 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:28,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:28,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:28,134 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 20:08:28,334 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,SelfDestructingSolverStorable19 [2023-08-26 20:08:28,334 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 20:08:28,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1416072378, now seen corresponding path program 14 times [2023-08-26 20:08:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:28,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124431616] [2023-08-26 20:08:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:28,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:28,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:28,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124431616] [2023-08-26 20:08:28,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124431616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:28,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622373360] [2023-08-26 20:08:28,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:08:28,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:28,591 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 20:08:28,616 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 20:08:28,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:08:28,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:28,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:08:28,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:28,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622373360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:29,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:29,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-26 20:08:29,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352975978] [2023-08-26 20:08:29,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:29,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 20:08:29,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:29,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 20:08:29,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-26 20:08:29,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:08:29,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 421 transitions, 7612 flow. Second operand has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:29,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:29,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:08:29,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:30,745 INFO L124 PetriNetUnfolderBase]: 1224/2234 cut-off events. [2023-08-26 20:08:30,746 INFO L125 PetriNetUnfolderBase]: For 61809/61809 co-relation queries the response was YES. [2023-08-26 20:08:30,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20267 conditions, 2234 events. 1224/2234 cut-off events. For 61809/61809 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 13488 event pairs, 24 based on Foata normal form. 54/2288 useless extension candidates. Maximal degree in co-relation 20180. Up to 1583 conditions per place. [2023-08-26 20:08:30,770 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 329 selfloop transitions, 206 changer transitions 3/538 dead transitions. [2023-08-26 20:08:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 538 transitions, 10503 flow [2023-08-26 20:08:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-26 20:08:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-26 20:08:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2186 transitions. [2023-08-26 20:08:30,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994883040935672 [2023-08-26 20:08:30,774 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2186 transitions. [2023-08-26 20:08:30,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2186 transitions. [2023-08-26 20:08:30,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:30,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2186 transitions. [2023-08-26 20:08:30,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 68.3125) internal successors, (2186), 32 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:30,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 171.0) internal successors, (5643), 33 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:30,784 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 171.0) internal successors, (5643), 33 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:30,784 INFO L175 Difference]: Start difference. First operand has 252 places, 421 transitions, 7612 flow. Second operand 32 states and 2186 transitions. [2023-08-26 20:08:30,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 538 transitions, 10503 flow [2023-08-26 20:08:31,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 538 transitions, 9562 flow, removed 440 selfloop flow, removed 8 redundant places. [2023-08-26 20:08:31,089 INFO L231 Difference]: Finished difference. Result has 285 places, 469 transitions, 8589 flow [2023-08-26 20:08:31,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=6910, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8589, PETRI_PLACES=285, PETRI_TRANSITIONS=469} [2023-08-26 20:08:31,090 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 257 predicate places. [2023-08-26 20:08:31,090 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 469 transitions, 8589 flow [2023-08-26 20:08:31,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:31,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:31,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:31,095 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 20:08:31,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:31,291 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 20:08:31,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2073824902, now seen corresponding path program 15 times [2023-08-26 20:08:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:31,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988289475] [2023-08-26 20:08:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:31,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:31,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:31,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988289475] [2023-08-26 20:08:31,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988289475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:31,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008487044] [2023-08-26 20:08:31,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:08:31,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:31,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:31,520 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 20:08:31,544 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 20:08:31,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 20:08:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:31,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:08:31,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:31,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:32,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008487044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:32,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:32,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-26 20:08:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874039942] [2023-08-26 20:08:32,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:32,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:08:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:08:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:08:32,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:08:32,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 469 transitions, 8589 flow. Second operand has 18 states, 18 states have (on average 65.77777777777777) internal successors, (1184), 18 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:32,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:32,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:08:32,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:33,467 INFO L124 PetriNetUnfolderBase]: 1319/2369 cut-off events. [2023-08-26 20:08:33,467 INFO L125 PetriNetUnfolderBase]: For 55142/55142 co-relation queries the response was YES. [2023-08-26 20:08:33,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21862 conditions, 2369 events. 1319/2369 cut-off events. For 55142/55142 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14243 event pairs, 29 based on Foata normal form. 26/2395 useless extension candidates. Maximal degree in co-relation 21765. Up to 1635 conditions per place. [2023-08-26 20:08:33,496 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 307 selfloop transitions, 248 changer transitions 5/560 dead transitions. [2023-08-26 20:08:33,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 560 transitions, 11122 flow [2023-08-26 20:08:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 20:08:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 20:08:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1708 transitions. [2023-08-26 20:08:33,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39953216374269007 [2023-08-26 20:08:33,503 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1708 transitions. [2023-08-26 20:08:33,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1708 transitions. [2023-08-26 20:08:33,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:33,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1708 transitions. [2023-08-26 20:08:33,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 68.32) internal successors, (1708), 25 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:33,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:33,510 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:33,511 INFO L175 Difference]: Start difference. First operand has 285 places, 469 transitions, 8589 flow. Second operand 25 states and 1708 transitions. [2023-08-26 20:08:33,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 560 transitions, 11122 flow [2023-08-26 20:08:33,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 560 transitions, 10763 flow, removed 142 selfloop flow, removed 17 redundant places. [2023-08-26 20:08:33,819 INFO L231 Difference]: Finished difference. Result has 299 places, 506 transitions, 9941 flow [2023-08-26 20:08:33,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=8168, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9941, PETRI_PLACES=299, PETRI_TRANSITIONS=506} [2023-08-26 20:08:33,820 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 271 predicate places. [2023-08-26 20:08:33,820 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 506 transitions, 9941 flow [2023-08-26 20:08:33,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.77777777777777) internal successors, (1184), 18 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:33,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:33,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:33,829 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 20:08:34,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:34,026 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 20:08:34,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:34,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1704534000, now seen corresponding path program 16 times [2023-08-26 20:08:34,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:34,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002747086] [2023-08-26 20:08:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:34,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:34,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002747086] [2023-08-26 20:08:34,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002747086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:34,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359984115] [2023-08-26 20:08:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:08:34,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:34,273 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 20:08:34,296 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 20:08:34,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:08:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:34,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 20:08:34,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:34,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:34,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359984115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:34,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:34,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2023-08-26 20:08:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121095533] [2023-08-26 20:08:34,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:34,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 20:08:34,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 20:08:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-26 20:08:34,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:08:34,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 506 transitions, 9941 flow. Second operand has 19 states, 19 states have (on average 63.78947368421053) internal successors, (1212), 19 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:34,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:34,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:08:34,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:36,084 INFO L124 PetriNetUnfolderBase]: 1397/2499 cut-off events. [2023-08-26 20:08:36,084 INFO L125 PetriNetUnfolderBase]: For 65778/65778 co-relation queries the response was YES. [2023-08-26 20:08:36,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24204 conditions, 2499 events. 1397/2499 cut-off events. For 65778/65778 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15066 event pairs, 27 based on Foata normal form. 44/2543 useless extension candidates. Maximal degree in co-relation 24103. Up to 1762 conditions per place. [2023-08-26 20:08:36,112 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 372 selfloop transitions, 209 changer transitions 2/583 dead transitions. [2023-08-26 20:08:36,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 583 transitions, 12366 flow [2023-08-26 20:08:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 20:08:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 20:08:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1596 transitions. [2023-08-26 20:08:36,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-26 20:08:36,115 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1596 transitions. [2023-08-26 20:08:36,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1596 transitions. [2023-08-26 20:08:36,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:36,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1596 transitions. [2023-08-26 20:08:36,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 66.5) internal successors, (1596), 24 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:36,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:36,122 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:36,122 INFO L175 Difference]: Start difference. First operand has 299 places, 506 transitions, 9941 flow. Second operand 24 states and 1596 transitions. [2023-08-26 20:08:36,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 583 transitions, 12366 flow [2023-08-26 20:08:36,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 583 transitions, 11982 flow, removed 155 selfloop flow, removed 10 redundant places. [2023-08-26 20:08:36,431 INFO L231 Difference]: Finished difference. Result has 315 places, 530 transitions, 10998 flow [2023-08-26 20:08:36,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=9466, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10998, PETRI_PLACES=315, PETRI_TRANSITIONS=530} [2023-08-26 20:08:36,432 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 287 predicate places. [2023-08-26 20:08:36,432 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 530 transitions, 10998 flow [2023-08-26 20:08:36,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.78947368421053) internal successors, (1212), 19 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:36,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:36,433 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:36,437 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 20:08:36,634 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,SelfDestructingSolverStorable22 [2023-08-26 20:08:36,634 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 20:08:36,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1691500851, now seen corresponding path program 17 times [2023-08-26 20:08:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:36,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131959304] [2023-08-26 20:08:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:36,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:36,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131959304] [2023-08-26 20:08:36,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131959304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519385377] [2023-08-26 20:08:36,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 20:08:36,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:36,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:36,861 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 20:08:36,883 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 20:08:36,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 20:08:36,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:36,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:08:36,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:37,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:37,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519385377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:37,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:37,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-26 20:08:37,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850937443] [2023-08-26 20:08:37,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:37,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:08:37,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:08:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:08:37,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:08:37,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 530 transitions, 10998 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:37,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:37,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:08:37,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:39,384 INFO L124 PetriNetUnfolderBase]: 2224/3772 cut-off events. [2023-08-26 20:08:39,384 INFO L125 PetriNetUnfolderBase]: For 103364/103364 co-relation queries the response was YES. [2023-08-26 20:08:39,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38968 conditions, 3772 events. 2224/3772 cut-off events. For 103364/103364 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 22830 event pairs, 31 based on Foata normal form. 28/3800 useless extension candidates. Maximal degree in co-relation 38860. Up to 1315 conditions per place. [2023-08-26 20:08:39,426 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 493 selfloop transitions, 508 changer transitions 14/1015 dead transitions. [2023-08-26 20:08:39,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1015 transitions, 22634 flow [2023-08-26 20:08:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 20:08:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 20:08:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2463 transitions. [2023-08-26 20:08:39,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892840208629682 [2023-08-26 20:08:39,430 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2463 transitions. [2023-08-26 20:08:39,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2463 transitions. [2023-08-26 20:08:39,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:39,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2463 transitions. [2023-08-26 20:08:39,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 66.56756756756756) internal successors, (2463), 37 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:39,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:39,439 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:39,439 INFO L175 Difference]: Start difference. First operand has 315 places, 530 transitions, 10998 flow. Second operand 37 states and 2463 transitions. [2023-08-26 20:08:39,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1015 transitions, 22634 flow [2023-08-26 20:08:39,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1015 transitions, 21536 flow, removed 421 selfloop flow, removed 15 redundant places. [2023-08-26 20:08:39,990 INFO L231 Difference]: Finished difference. Result has 352 places, 845 transitions, 18451 flow [2023-08-26 20:08:39,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=10281, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18451, PETRI_PLACES=352, PETRI_TRANSITIONS=845} [2023-08-26 20:08:39,991 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 324 predicate places. [2023-08-26 20:08:39,991 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 845 transitions, 18451 flow [2023-08-26 20:08:39,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:39,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:39,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:39,996 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 20:08:40,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:40,192 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 20:08:40,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:40,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1182492243, now seen corresponding path program 18 times [2023-08-26 20:08:40,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:40,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643536309] [2023-08-26 20:08:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:40,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:40,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643536309] [2023-08-26 20:08:40,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643536309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770886885] [2023-08-26 20:08:40,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 20:08:40,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:40,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:40,523 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 20:08:40,525 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 20:08:40,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 20:08:40,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:40,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 20:08:40,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:40,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:41,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770886885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:41,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:41,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-08-26 20:08:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568792688] [2023-08-26 20:08:41,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:41,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 20:08:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 20:08:41,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-08-26 20:08:41,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:08:41,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 845 transitions, 18451 flow. Second operand has 21 states, 21 states have (on average 64.04761904761905) internal successors, (1345), 21 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:41,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:41,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:08:41,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:43,267 INFO L124 PetriNetUnfolderBase]: 2378/4080 cut-off events. [2023-08-26 20:08:43,267 INFO L125 PetriNetUnfolderBase]: For 133389/133389 co-relation queries the response was YES. [2023-08-26 20:08:43,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44501 conditions, 4080 events. 2378/4080 cut-off events. For 133389/133389 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 25671 event pairs, 91 based on Foata normal form. 40/4120 useless extension candidates. Maximal degree in co-relation 44380. Up to 1688 conditions per place. [2023-08-26 20:08:43,320 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 534 selfloop transitions, 449 changer transitions 1/984 dead transitions. [2023-08-26 20:08:43,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 984 transitions, 23724 flow [2023-08-26 20:08:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-26 20:08:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-26 20:08:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1738 transitions. [2023-08-26 20:08:43,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3909131803868646 [2023-08-26 20:08:43,323 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1738 transitions. [2023-08-26 20:08:43,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1738 transitions. [2023-08-26 20:08:43,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:43,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1738 transitions. [2023-08-26 20:08:43,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.84615384615384) internal successors, (1738), 26 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:43,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 171.0) internal successors, (4617), 27 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:43,329 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 171.0) internal successors, (4617), 27 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:43,329 INFO L175 Difference]: Start difference. First operand has 352 places, 845 transitions, 18451 flow. Second operand 26 states and 1738 transitions. [2023-08-26 20:08:43,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 984 transitions, 23724 flow [2023-08-26 20:08:44,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 984 transitions, 21284 flow, removed 1047 selfloop flow, removed 6 redundant places. [2023-08-26 20:08:44,124 INFO L231 Difference]: Finished difference. Result has 378 places, 913 transitions, 19826 flow [2023-08-26 20:08:44,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=16749, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=19826, PETRI_PLACES=378, PETRI_TRANSITIONS=913} [2023-08-26 20:08:44,125 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 350 predicate places. [2023-08-26 20:08:44,125 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 913 transitions, 19826 flow [2023-08-26 20:08:44,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.04761904761905) internal successors, (1345), 21 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:44,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:44,126 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:44,131 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 20:08:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:44,326 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 20:08:44,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:44,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1832958699, now seen corresponding path program 19 times [2023-08-26 20:08:44,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:44,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352203107] [2023-08-26 20:08:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:44,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:44,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:44,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352203107] [2023-08-26 20:08:44,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352203107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:44,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227077528] [2023-08-26 20:08:44,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 20:08:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:44,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:44,669 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 20:08:44,673 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 20:08:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:44,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:08:44,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:44,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:45,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227077528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:45,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:45,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-26 20:08:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112118039] [2023-08-26 20:08:45,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:45,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 20:08:45,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 20:08:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-08-26 20:08:45,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:08:45,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 913 transitions, 19826 flow. Second operand has 22 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:45,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:45,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:08:45,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:48,360 INFO L124 PetriNetUnfolderBase]: 2447/4215 cut-off events. [2023-08-26 20:08:48,360 INFO L125 PetriNetUnfolderBase]: For 120998/120998 co-relation queries the response was YES. [2023-08-26 20:08:48,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44090 conditions, 4215 events. 2447/4215 cut-off events. For 120998/120998 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26714 event pairs, 40 based on Foata normal form. 50/4263 useless extension candidates. Maximal degree in co-relation 43965. Up to 1470 conditions per place. [2023-08-26 20:08:48,413 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 533 selfloop transitions, 505 changer transitions 6/1044 dead transitions. [2023-08-26 20:08:48,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1044 transitions, 23593 flow [2023-08-26 20:08:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 20:08:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 20:08:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2806 transitions. [2023-08-26 20:08:48,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002282128084439 [2023-08-26 20:08:48,417 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2806 transitions. [2023-08-26 20:08:48,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2806 transitions. [2023-08-26 20:08:48,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:48,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2806 transitions. [2023-08-26 20:08:48,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 68.4390243902439) internal successors, (2806), 41 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:48,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:48,426 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:48,426 INFO L175 Difference]: Start difference. First operand has 378 places, 913 transitions, 19826 flow. Second operand 41 states and 2806 transitions. [2023-08-26 20:08:48,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1044 transitions, 23593 flow [2023-08-26 20:08:49,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1044 transitions, 22412 flow, removed 549 selfloop flow, removed 12 redundant places. [2023-08-26 20:08:49,259 INFO L231 Difference]: Finished difference. Result has 409 places, 931 transitions, 20344 flow [2023-08-26 20:08:49,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=18570, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=20344, PETRI_PLACES=409, PETRI_TRANSITIONS=931} [2023-08-26 20:08:49,260 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 381 predicate places. [2023-08-26 20:08:49,260 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 931 transitions, 20344 flow [2023-08-26 20:08:49,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:49,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:49,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:49,265 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 20:08:49,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:49,461 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 20:08:49,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:49,462 INFO L85 PathProgramCache]: Analyzing trace with hash 347265575, now seen corresponding path program 20 times [2023-08-26 20:08:49,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:49,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335794262] [2023-08-26 20:08:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:49,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:50,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:50,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335794262] [2023-08-26 20:08:50,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335794262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:50,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756377540] [2023-08-26 20:08:50,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:08:50,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:50,009 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 20:08:50,035 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 20:08:50,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:08:50,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:50,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:08:50,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:50,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:50,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756377540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:50,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:50,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-26 20:08:50,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121084130] [2023-08-26 20:08:50,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:50,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 20:08:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 20:08:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2023-08-26 20:08:50,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:08:50,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 931 transitions, 20344 flow. Second operand has 24 states, 24 states have (on average 63.708333333333336) internal successors, (1529), 24 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:50,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:50,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:08:50,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:54,217 INFO L124 PetriNetUnfolderBase]: 2502/4262 cut-off events. [2023-08-26 20:08:54,217 INFO L125 PetriNetUnfolderBase]: For 113456/113456 co-relation queries the response was YES. [2023-08-26 20:08:54,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45305 conditions, 4262 events. 2502/4262 cut-off events. For 113456/113456 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26547 event pairs, 78 based on Foata normal form. 10/4270 useless extension candidates. Maximal degree in co-relation 45179. Up to 1939 conditions per place. [2023-08-26 20:08:54,269 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 559 selfloop transitions, 585 changer transitions 3/1147 dead transitions. [2023-08-26 20:08:54,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1147 transitions, 26144 flow [2023-08-26 20:08:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-26 20:08:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-26 20:08:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3566 transitions. [2023-08-26 20:08:54,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861815031405675 [2023-08-26 20:08:54,273 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3566 transitions. [2023-08-26 20:08:54,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3566 transitions. [2023-08-26 20:08:54,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:54,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3566 transitions. [2023-08-26 20:08:54,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 66.03703703703704) internal successors, (3566), 54 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:54,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 171.0) internal successors, (9405), 55 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:54,284 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 171.0) internal successors, (9405), 55 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:54,285 INFO L175 Difference]: Start difference. First operand has 409 places, 931 transitions, 20344 flow. Second operand 54 states and 3566 transitions. [2023-08-26 20:08:54,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1147 transitions, 26144 flow [2023-08-26 20:08:55,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1147 transitions, 25388 flow, removed 141 selfloop flow, removed 20 redundant places. [2023-08-26 20:08:55,228 INFO L231 Difference]: Finished difference. Result has 448 places, 995 transitions, 22465 flow [2023-08-26 20:08:55,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=19489, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=22465, PETRI_PLACES=448, PETRI_TRANSITIONS=995} [2023-08-26 20:08:55,230 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 420 predicate places. [2023-08-26 20:08:55,230 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 995 transitions, 22465 flow [2023-08-26 20:08:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 63.708333333333336) internal successors, (1529), 24 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:55,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:55,230 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:55,236 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 20:08:55,435 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,SelfDestructingSolverStorable26 [2023-08-26 20:08:55,435 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 20:08:55,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash 29072247, now seen corresponding path program 21 times [2023-08-26 20:08:55,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:55,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672038424] [2023-08-26 20:08:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:55,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:55,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:55,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672038424] [2023-08-26 20:08:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672038424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:55,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365435648] [2023-08-26 20:08:55,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:08:55,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:55,753 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 20:08:55,780 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 20:08:55,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 20:08:55,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:55,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 20:08:55,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:56,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365435648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:56,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:56,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-26 20:08:56,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543512329] [2023-08-26 20:08:56,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:56,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 20:08:56,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:56,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 20:08:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-26 20:08:56,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:08:56,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 995 transitions, 22465 flow. Second operand has 22 states, 22 states have (on average 64.04545454545455) internal successors, (1409), 22 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:56,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:56,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:08:56,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:59,281 INFO L124 PetriNetUnfolderBase]: 2580/4404 cut-off events. [2023-08-26 20:08:59,281 INFO L125 PetriNetUnfolderBase]: For 130064/130064 co-relation queries the response was YES. [2023-08-26 20:08:59,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47150 conditions, 4404 events. 2580/4404 cut-off events. For 130064/130064 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 27735 event pairs, 59 based on Foata normal form. 32/4436 useless extension candidates. Maximal degree in co-relation 47019. Up to 1695 conditions per place. [2023-08-26 20:08:59,339 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 574 selfloop transitions, 603 changer transitions 4/1181 dead transitions. [2023-08-26 20:08:59,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1181 transitions, 27623 flow [2023-08-26 20:08:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-26 20:08:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-26 20:08:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2796 transitions. [2023-08-26 20:08:59,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893065998329156 [2023-08-26 20:08:59,350 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2796 transitions. [2023-08-26 20:08:59,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2796 transitions. [2023-08-26 20:08:59,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:59,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2796 transitions. [2023-08-26 20:08:59,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 66.57142857142857) internal successors, (2796), 42 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:59,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:59,363 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:59,363 INFO L175 Difference]: Start difference. First operand has 448 places, 995 transitions, 22465 flow. Second operand 42 states and 2796 transitions. [2023-08-26 20:08:59,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1181 transitions, 27623 flow [2023-08-26 20:09:00,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1181 transitions, 26608 flow, removed 200 selfloop flow, removed 33 redundant places. [2023-08-26 20:09:00,518 INFO L231 Difference]: Finished difference. Result has 461 places, 1031 transitions, 23608 flow [2023-08-26 20:09:00,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=21512, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=566, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=23608, PETRI_PLACES=461, PETRI_TRANSITIONS=1031} [2023-08-26 20:09:00,520 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 433 predicate places. [2023-08-26 20:09:00,520 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1031 transitions, 23608 flow [2023-08-26 20:09:00,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.04545454545455) internal successors, (1409), 22 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:00,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:00,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:00,528 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 20:09:00,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-26 20:09:00,725 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 20:09:00,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash -561987943, now seen corresponding path program 22 times [2023-08-26 20:09:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953556240] [2023-08-26 20:09:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:00,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:00,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953556240] [2023-08-26 20:09:00,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953556240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:09:00,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283679111] [2023-08-26 20:09:00,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:09:00,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:00,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:09:00,997 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 20:09:01,023 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 20:09:01,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:09:01,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:09:01,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:09:01,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:09:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:01,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:09:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:01,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283679111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:09:01,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:09:01,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-26 20:09:01,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065792505] [2023-08-26 20:09:01,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:09:01,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:09:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:09:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:09:01,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:09:01,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1031 transitions, 23608 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:01,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:01,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:09:01,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:09:04,275 INFO L124 PetriNetUnfolderBase]: 2800/4788 cut-off events. [2023-08-26 20:09:04,275 INFO L125 PetriNetUnfolderBase]: For 169170/169170 co-relation queries the response was YES. [2023-08-26 20:09:04,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52457 conditions, 4788 events. 2800/4788 cut-off events. For 169170/169170 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30993 event pairs, 401 based on Foata normal form. 34/4822 useless extension candidates. Maximal degree in co-relation 52322. Up to 3194 conditions per place. [2023-08-26 20:09:04,333 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 827 selfloop transitions, 396 changer transitions 0/1223 dead transitions. [2023-08-26 20:09:04,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1223 transitions, 29668 flow [2023-08-26 20:09:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-26 20:09:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-26 20:09:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2804 transitions. [2023-08-26 20:09:04,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39042049568365356 [2023-08-26 20:09:04,336 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2804 transitions. [2023-08-26 20:09:04,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2804 transitions. [2023-08-26 20:09:04,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:09:04,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2804 transitions. [2023-08-26 20:09:04,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 66.76190476190476) internal successors, (2804), 42 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:04,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:04,345 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:04,345 INFO L175 Difference]: Start difference. First operand has 461 places, 1031 transitions, 23608 flow. Second operand 42 states and 2804 transitions. [2023-08-26 20:09:04,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1223 transitions, 29668 flow [2023-08-26 20:09:05,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1223 transitions, 29089 flow, removed 157 selfloop flow, removed 18 redundant places. [2023-08-26 20:09:05,362 INFO L231 Difference]: Finished difference. Result has 497 places, 1106 transitions, 26710 flow [2023-08-26 20:09:05,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=23075, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=26710, PETRI_PLACES=497, PETRI_TRANSITIONS=1106} [2023-08-26 20:09:05,363 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 469 predicate places. [2023-08-26 20:09:05,363 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1106 transitions, 26710 flow [2023-08-26 20:09:05,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:05,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:05,364 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:05,369 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 20:09:05,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 20:09:05,569 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 20:09:05,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash 462943807, now seen corresponding path program 23 times [2023-08-26 20:09:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:05,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374670327] [2023-08-26 20:09:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:06,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:06,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374670327] [2023-08-26 20:09:06,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374670327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:09:06,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876574100] [2023-08-26 20:09:06,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 20:09:06,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:06,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:09:06,129 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 20:09:06,155 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 20:09:06,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 20:09:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:09:06,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:09:06,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:09:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:06,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:09:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876574100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:09:06,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:09:06,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-08-26 20:09:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670211706] [2023-08-26 20:09:06,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:09:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 20:09:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 20:09:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-08-26 20:09:06,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:09:06,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1106 transitions, 26710 flow. Second operand has 24 states, 24 states have (on average 63.791666666666664) internal successors, (1531), 24 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:06,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:06,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:09:06,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:09:12,867 INFO L124 PetriNetUnfolderBase]: 3149/5373 cut-off events. [2023-08-26 20:09:12,867 INFO L125 PetriNetUnfolderBase]: For 219279/219279 co-relation queries the response was YES. [2023-08-26 20:09:12,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61662 conditions, 5373 events. 3149/5373 cut-off events. For 219279/219279 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35318 event pairs, 77 based on Foata normal form. 56/5429 useless extension candidates. Maximal degree in co-relation 61514. Up to 3733 conditions per place. [2023-08-26 20:09:12,941 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 815 selfloop transitions, 540 changer transitions 9/1364 dead transitions. [2023-08-26 20:09:12,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1364 transitions, 35716 flow [2023-08-26 20:09:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-26 20:09:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-26 20:09:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3128 transitions. [2023-08-26 20:09:12,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891999502301854 [2023-08-26 20:09:12,945 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3128 transitions. [2023-08-26 20:09:12,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3128 transitions. [2023-08-26 20:09:12,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:09:12,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3128 transitions. [2023-08-26 20:09:12,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 66.55319148936171) internal successors, (3128), 47 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:12,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:12,954 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:12,954 INFO L175 Difference]: Start difference. First operand has 497 places, 1106 transitions, 26710 flow. Second operand 47 states and 3128 transitions. [2023-08-26 20:09:12,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1364 transitions, 35716 flow [2023-08-26 20:09:14,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1364 transitions, 34497 flow, removed 556 selfloop flow, removed 11 redundant places. [2023-08-26 20:09:14,509 INFO L231 Difference]: Finished difference. Result has 547 places, 1243 transitions, 31810 flow [2023-08-26 20:09:14,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=25826, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=31810, PETRI_PLACES=547, PETRI_TRANSITIONS=1243} [2023-08-26 20:09:14,510 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 519 predicate places. [2023-08-26 20:09:14,510 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1243 transitions, 31810 flow [2023-08-26 20:09:14,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 63.791666666666664) internal successors, (1531), 24 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:14,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:14,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:14,517 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 20:09:14,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:14,716 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 20:09:14,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -973071251, now seen corresponding path program 24 times [2023-08-26 20:09:14,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:14,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748869439] [2023-08-26 20:09:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:14,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:15,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:15,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748869439] [2023-08-26 20:09:15,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748869439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:09:15,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942103821] [2023-08-26 20:09:15,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 20:09:15,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:09:15,041 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 20:09:15,066 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 20:09:15,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 20:09:15,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:09:15,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:09:15,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:09:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:15,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:09:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942103821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:09:15,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:09:15,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-26 20:09:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294157226] [2023-08-26 20:09:15,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:09:15,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 20:09:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 20:09:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-26 20:09:15,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:09:15,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1243 transitions, 31810 flow. Second operand has 19 states, 19 states have (on average 63.68421052631579) internal successors, (1210), 19 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:15,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:15,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:09:15,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:09:22,796 INFO L124 PetriNetUnfolderBase]: 3205/5439 cut-off events. [2023-08-26 20:09:22,796 INFO L125 PetriNetUnfolderBase]: For 248594/248594 co-relation queries the response was YES. [2023-08-26 20:09:22,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65356 conditions, 5439 events. 3205/5439 cut-off events. For 248594/248594 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35924 event pairs, 541 based on Foata normal form. 20/5459 useless extension candidates. Maximal degree in co-relation 65191. Up to 4267 conditions per place. [2023-08-26 20:09:22,889 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 882 selfloop transitions, 466 changer transitions 6/1354 dead transitions. [2023-08-26 20:09:22,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1354 transitions, 37159 flow [2023-08-26 20:09:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 20:09:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 20:09:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2455 transitions. [2023-08-26 20:09:22,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38801959854591433 [2023-08-26 20:09:22,893 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2455 transitions. [2023-08-26 20:09:22,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2455 transitions. [2023-08-26 20:09:22,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:09:22,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2455 transitions. [2023-08-26 20:09:22,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 66.35135135135135) internal successors, (2455), 37 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:22,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:22,901 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:22,901 INFO L175 Difference]: Start difference. First operand has 547 places, 1243 transitions, 31810 flow. Second operand 37 states and 2455 transitions. [2023-08-26 20:09:22,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1354 transitions, 37159 flow [2023-08-26 20:09:24,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 1354 transitions, 35434 flow, removed 794 selfloop flow, removed 23 redundant places. [2023-08-26 20:09:24,829 INFO L231 Difference]: Finished difference. Result has 567 places, 1275 transitions, 32922 flow [2023-08-26 20:09:24,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=30291, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=32922, PETRI_PLACES=567, PETRI_TRANSITIONS=1275} [2023-08-26 20:09:24,830 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 539 predicate places. [2023-08-26 20:09:24,830 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1275 transitions, 32922 flow [2023-08-26 20:09:24,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.68421052631579) internal successors, (1210), 19 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:24,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:24,831 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:24,835 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 20:09:25,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:25,033 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 20:09:25,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:25,033 INFO L85 PathProgramCache]: Analyzing trace with hash -613848505, now seen corresponding path program 25 times [2023-08-26 20:09:25,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:25,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471415918] [2023-08-26 20:09:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:25,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:25,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471415918] [2023-08-26 20:09:25,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471415918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:09:25,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281005432] [2023-08-26 20:09:25,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 20:09:25,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:25,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:09:25,319 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 20:09:25,320 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 20:09:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:25,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:09:25,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:09:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:25,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:09:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281005432] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:09:25,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:09:25,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-26 20:09:25,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699292409] [2023-08-26 20:09:25,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:09:25,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 20:09:25,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 20:09:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-08-26 20:09:25,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:09:25,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1275 transitions, 32922 flow. Second operand has 20 states, 20 states have (on average 65.85) internal successors, (1317), 20 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:25,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:25,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:09:25,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:09:31,399 INFO L124 PetriNetUnfolderBase]: 3700/6318 cut-off events. [2023-08-26 20:09:31,399 INFO L125 PetriNetUnfolderBase]: For 286341/286341 co-relation queries the response was YES. [2023-08-26 20:09:31,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75468 conditions, 6318 events. 3700/6318 cut-off events. For 286341/286341 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 42635 event pairs, 49 based on Foata normal form. 78/6396 useless extension candidates. Maximal degree in co-relation 75296. Up to 1990 conditions per place. [2023-08-26 20:09:31,593 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 569 selfloop transitions, 976 changer transitions 17/1562 dead transitions. [2023-08-26 20:09:31,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 1562 transitions, 41900 flow [2023-08-26 20:09:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-26 20:09:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-26 20:09:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3071 transitions. [2023-08-26 20:09:31,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399090318388564 [2023-08-26 20:09:31,596 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3071 transitions. [2023-08-26 20:09:31,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3071 transitions. [2023-08-26 20:09:31,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:09:31,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3071 transitions. [2023-08-26 20:09:31,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 68.24444444444444) internal successors, (3071), 45 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:31,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 171.0) internal successors, (7866), 46 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:31,603 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 171.0) internal successors, (7866), 46 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:31,603 INFO L175 Difference]: Start difference. First operand has 567 places, 1275 transitions, 32922 flow. Second operand 45 states and 3071 transitions. [2023-08-26 20:09:31,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 1562 transitions, 41900 flow [2023-08-26 20:09:34,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1562 transitions, 40694 flow, removed 314 selfloop flow, removed 26 redundant places. [2023-08-26 20:09:34,113 INFO L231 Difference]: Finished difference. Result has 590 places, 1456 transitions, 39097 flow [2023-08-26 20:09:34,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=31396, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=783, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=39097, PETRI_PLACES=590, PETRI_TRANSITIONS=1456} [2023-08-26 20:09:34,114 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 562 predicate places. [2023-08-26 20:09:34,115 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1456 transitions, 39097 flow [2023-08-26 20:09:34,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.85) internal successors, (1317), 20 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:34,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:34,115 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:34,123 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 20:09:34,320 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,SelfDestructingSolverStorable31 [2023-08-26 20:09:34,320 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 20:09:34,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash -288884667, now seen corresponding path program 26 times [2023-08-26 20:09:34,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:34,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553070749] [2023-08-26 20:09:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:34,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553070749] [2023-08-26 20:09:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553070749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:09:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787307060] [2023-08-26 20:09:34,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:09:34,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:09:34,611 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 20:09:34,618 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 20:09:34,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:09:34,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:09:34,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:09:34,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:09:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:34,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:09:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:36,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787307060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:09:36,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:09:36,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-26 20:09:36,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577852764] [2023-08-26 20:09:36,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:09:36,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 20:09:36,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 20:09:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-26 20:09:36,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:09:36,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1456 transitions, 39097 flow. Second operand has 21 states, 21 states have (on average 65.95238095238095) internal successors, (1385), 21 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:36,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:36,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:09:36,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:09:40,803 INFO L124 PetriNetUnfolderBase]: 3764/6428 cut-off events. [2023-08-26 20:09:40,803 INFO L125 PetriNetUnfolderBase]: For 296958/296958 co-relation queries the response was YES. [2023-08-26 20:09:40,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80808 conditions, 6428 events. 3764/6428 cut-off events. For 296958/296958 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 43415 event pairs, 73 based on Foata normal form. 16/6444 useless extension candidates. Maximal degree in co-relation 80630. Up to 2602 conditions per place. [2023-08-26 20:09:40,925 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 898 selfloop transitions, 671 changer transitions 4/1573 dead transitions. [2023-08-26 20:09:40,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 1573 transitions, 44445 flow [2023-08-26 20:09:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 20:09:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 20:09:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2257 transitions. [2023-08-26 20:09:40,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3999645578592947 [2023-08-26 20:09:40,927 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2257 transitions. [2023-08-26 20:09:40,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2257 transitions. [2023-08-26 20:09:40,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:09:40,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2257 transitions. [2023-08-26 20:09:40,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 68.39393939393939) internal successors, (2257), 33 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:40,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:40,933 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:40,933 INFO L175 Difference]: Start difference. First operand has 590 places, 1456 transitions, 39097 flow. Second operand 33 states and 2257 transitions. [2023-08-26 20:09:40,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 1573 transitions, 44445 flow [2023-08-26 20:09:44,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1573 transitions, 43101 flow, removed 552 selfloop flow, removed 28 redundant places. [2023-08-26 20:09:44,046 INFO L231 Difference]: Finished difference. Result has 598 places, 1492 transitions, 40852 flow [2023-08-26 20:09:44,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=37955, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=40852, PETRI_PLACES=598, PETRI_TRANSITIONS=1492} [2023-08-26 20:09:44,048 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 570 predicate places. [2023-08-26 20:09:44,048 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 1492 transitions, 40852 flow [2023-08-26 20:09:44,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.95238095238095) internal successors, (1385), 21 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:44,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:44,048 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:44,056 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 20:09:44,253 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,SelfDestructingSolverStorable32 [2023-08-26 20:09:44,253 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 20:09:44,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash 958430463, now seen corresponding path program 27 times [2023-08-26 20:09:44,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:44,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70799877] [2023-08-26 20:09:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:44,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:44,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70799877] [2023-08-26 20:09:44,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70799877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:09:44,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671955015] [2023-08-26 20:09:44,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:09:44,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:44,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:09:44,501 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 20:09:44,509 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 20:09:44,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 20:09:44,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:09:44,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 20:09:44,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:09:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:44,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:09:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:44,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671955015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:09:44,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:09:44,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-26 20:09:44,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065506193] [2023-08-26 20:09:44,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:09:44,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 20:09:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 20:09:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-08-26 20:09:44,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:09:44,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 1492 transitions, 40852 flow. Second operand has 21 states, 21 states have (on average 64.0) internal successors, (1344), 21 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:44,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:44,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:09:44,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:09:49,096 INFO L124 PetriNetUnfolderBase]: 3960/6786 cut-off events. [2023-08-26 20:09:49,096 INFO L125 PetriNetUnfolderBase]: For 346817/346817 co-relation queries the response was YES. [2023-08-26 20:09:49,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86250 conditions, 6786 events. 3960/6786 cut-off events. For 346817/346817 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 46487 event pairs, 387 based on Foata normal form. 28/6814 useless extension candidates. Maximal degree in co-relation 86067. Up to 5910 conditions per place. [2023-08-26 20:09:49,226 INFO L140 encePairwiseOnDemand]: 162/171 looper letters, 1411 selfloop transitions, 254 changer transitions 14/1679 dead transitions. [2023-08-26 20:09:49,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 1679 transitions, 49175 flow [2023-08-26 20:09:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-26 20:09:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-26 20:09:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2550 transitions. [2023-08-26 20:09:49,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39242843951985223 [2023-08-26 20:09:49,229 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2550 transitions. [2023-08-26 20:09:49,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2550 transitions. [2023-08-26 20:09:49,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:09:49,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2550 transitions. [2023-08-26 20:09:49,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 67.10526315789474) internal successors, (2550), 38 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:49,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 171.0) internal successors, (6669), 39 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:49,235 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 171.0) internal successors, (6669), 39 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:49,235 INFO L175 Difference]: Start difference. First operand has 598 places, 1492 transitions, 40852 flow. Second operand 38 states and 2550 transitions. [2023-08-26 20:09:49,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 1679 transitions, 49175 flow [2023-08-26 20:09:52,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1679 transitions, 48161 flow, removed 177 selfloop flow, removed 23 redundant places. [2023-08-26 20:09:52,603 INFO L231 Difference]: Finished difference. Result has 630 places, 1573 transitions, 43866 flow [2023-08-26 20:09:52,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=39893, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=43866, PETRI_PLACES=630, PETRI_TRANSITIONS=1573} [2023-08-26 20:09:52,605 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 602 predicate places. [2023-08-26 20:09:52,605 INFO L495 AbstractCegarLoop]: Abstraction has has 630 places, 1573 transitions, 43866 flow [2023-08-26 20:09:52,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.0) internal successors, (1344), 21 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:52,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:52,605 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:52,610 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 20:09:52,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:52,809 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 20:09:52,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash 475411609, now seen corresponding path program 28 times [2023-08-26 20:09:52,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:52,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373453141] [2023-08-26 20:09:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:52,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:53,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373453141] [2023-08-26 20:09:53,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373453141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:09:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311499803] [2023-08-26 20:09:53,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:09:53,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:09:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:09:53,053 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 20:09:53,079 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 20:09:53,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:09:53,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:09:53,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:09:53,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:09:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:53,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:09:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311499803] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:09:53,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:09:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-26 20:09:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923649437] [2023-08-26 20:09:53,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:09:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:09:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:09:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:09:53,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:09:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 1573 transitions, 43866 flow. Second operand has 18 states, 18 states have (on average 63.72222222222222) internal successors, (1147), 18 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:53,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:53,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:09:53,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:10:01,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:10:05,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:10:15,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-26 20:10:21,413 INFO L124 PetriNetUnfolderBase]: 4331/7330 cut-off events. [2023-08-26 20:10:21,413 INFO L125 PetriNetUnfolderBase]: For 431234/431234 co-relation queries the response was YES. [2023-08-26 20:10:21,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96572 conditions, 7330 events. 4331/7330 cut-off events. For 431234/431234 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 50196 event pairs, 1029 based on Foata normal form. 42/7372 useless extension candidates. Maximal degree in co-relation 96372. Up to 6561 conditions per place. [2023-08-26 20:10:21,545 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 1464 selfloop transitions, 318 changer transitions 13/1795 dead transitions. [2023-08-26 20:10:21,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 1795 transitions, 54621 flow [2023-08-26 20:10:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-26 20:10:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-26 20:10:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2317 transitions. [2023-08-26 20:10:21,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871345029239766 [2023-08-26 20:10:21,548 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2317 transitions. [2023-08-26 20:10:21,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2317 transitions. [2023-08-26 20:10:21,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:10:21,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2317 transitions. [2023-08-26 20:10:21,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.2) internal successors, (2317), 35 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:21,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 171.0) internal successors, (6156), 36 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:21,553 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 171.0) internal successors, (6156), 36 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:21,553 INFO L175 Difference]: Start difference. First operand has 630 places, 1573 transitions, 43866 flow. Second operand 35 states and 2317 transitions. [2023-08-26 20:10:21,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 1795 transitions, 54621 flow [2023-08-26 20:10:25,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 1795 transitions, 52415 flow, removed 1061 selfloop flow, removed 12 redundant places. [2023-08-26 20:10:25,441 INFO L231 Difference]: Finished difference. Result has 671 places, 1718 transitions, 48683 flow [2023-08-26 20:10:25,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42537, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=48683, PETRI_PLACES=671, PETRI_TRANSITIONS=1718} [2023-08-26 20:10:25,443 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 643 predicate places. [2023-08-26 20:10:25,443 INFO L495 AbstractCegarLoop]: Abstraction has has 671 places, 1718 transitions, 48683 flow [2023-08-26 20:10:25,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.72222222222222) internal successors, (1147), 18 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:25,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:10:25,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:10:25,451 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 20:10:25,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:10:25,649 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 20:10:25,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:10:25,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2009511677, now seen corresponding path program 29 times [2023-08-26 20:10:25,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:10:25,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631350998] [2023-08-26 20:10:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:10:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:10:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:10:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:25,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:10:25,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631350998] [2023-08-26 20:10:25,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631350998] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:10:25,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141280086] [2023-08-26 20:10:25,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 20:10:25,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:10:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:10:25,892 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 20:10:25,898 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 20:10:25,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 20:10:25,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:10:25,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:10:25,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:10:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:26,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:10:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:26,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141280086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:10:26,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:10:26,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-26 20:10:26,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459073974] [2023-08-26 20:10:26,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:10:26,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 20:10:26,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:10:26,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 20:10:26,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-26 20:10:26,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-26 20:10:26,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 1718 transitions, 48683 flow. Second operand has 21 states, 21 states have (on average 65.85714285714286) internal successors, (1383), 21 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:26,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:10:26,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-26 20:10:26,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:10:37,188 INFO L124 PetriNetUnfolderBase]: 4701/7990 cut-off events. [2023-08-26 20:10:37,188 INFO L125 PetriNetUnfolderBase]: For 529880/529880 co-relation queries the response was YES. [2023-08-26 20:10:37,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106932 conditions, 7990 events. 4701/7990 cut-off events. For 529880/529880 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 55611 event pairs, 384 based on Foata normal form. 76/8066 useless extension candidates. Maximal degree in co-relation 106714. Up to 6159 conditions per place. [2023-08-26 20:10:37,344 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 1485 selfloop transitions, 475 changer transitions 41/2001 dead transitions. [2023-08-26 20:10:37,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 2001 transitions, 61314 flow [2023-08-26 20:10:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 20:10:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 20:10:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2829 transitions. [2023-08-26 20:10:37,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-08-26 20:10:37,348 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2829 transitions. [2023-08-26 20:10:37,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2829 transitions. [2023-08-26 20:10:37,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:10:37,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2829 transitions. [2023-08-26 20:10:37,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 69.0) internal successors, (2829), 41 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:37,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:37,353 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:37,353 INFO L175 Difference]: Start difference. First operand has 671 places, 1718 transitions, 48683 flow. Second operand 41 states and 2829 transitions. [2023-08-26 20:10:37,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 2001 transitions, 61314 flow [2023-08-26 20:10:42,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 2001 transitions, 58919 flow, removed 1167 selfloop flow, removed 12 redundant places. [2023-08-26 20:10:42,474 INFO L231 Difference]: Finished difference. Result has 711 places, 1820 transitions, 52524 flow [2023-08-26 20:10:42,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=47084, PETRI_DIFFERENCE_MINUEND_PLACES=655, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=52524, PETRI_PLACES=711, PETRI_TRANSITIONS=1820} [2023-08-26 20:10:42,476 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 683 predicate places. [2023-08-26 20:10:42,476 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 1820 transitions, 52524 flow [2023-08-26 20:10:42,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.85714285714286) internal successors, (1383), 21 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:42,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:10:42,476 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:10:42,481 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 20:10:42,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:10:42,677 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 20:10:42,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:10:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1333096847, now seen corresponding path program 30 times [2023-08-26 20:10:42,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:10:42,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425256190] [2023-08-26 20:10:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:10:42,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:10:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:10:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:42,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:10:42,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425256190] [2023-08-26 20:10:42,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425256190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:10:42,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389389002] [2023-08-26 20:10:42,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 20:10:42,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:10:42,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:10:42,961 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 20:10:42,965 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 20:10:43,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 20:10:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:10:43,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 20:10:43,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:10:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:43,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:10:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:43,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389389002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:10:43,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:10:43,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-26 20:10:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264438770] [2023-08-26 20:10:43,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:10:43,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 20:10:43,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:10:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 20:10:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-26 20:10:43,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:10:43,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 1820 transitions, 52524 flow. Second operand has 22 states, 22 states have (on average 63.81818181818182) internal successors, (1404), 22 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:43,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:10:43,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:10:43,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:10:51,146 INFO L124 PetriNetUnfolderBase]: 4745/8062 cut-off events. [2023-08-26 20:10:51,146 INFO L125 PetriNetUnfolderBase]: For 544598/544598 co-relation queries the response was YES. [2023-08-26 20:10:51,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107686 conditions, 8062 events. 4745/8062 cut-off events. For 544598/544598 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 56127 event pairs, 635 based on Foata normal form. 74/8136 useless extension candidates. Maximal degree in co-relation 107453. Up to 6675 conditions per place. [2023-08-26 20:10:51,327 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 1473 selfloop transitions, 457 changer transitions 11/1941 dead transitions. [2023-08-26 20:10:51,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 1941 transitions, 58900 flow [2023-08-26 20:10:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 20:10:51,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 20:10:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1925 transitions. [2023-08-26 20:10:51,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881831014317403 [2023-08-26 20:10:51,330 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1925 transitions. [2023-08-26 20:10:51,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1925 transitions. [2023-08-26 20:10:51,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:10:51,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1925 transitions. [2023-08-26 20:10:51,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 66.37931034482759) internal successors, (1925), 29 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:51,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 171.0) internal successors, (5130), 30 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:51,336 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 171.0) internal successors, (5130), 30 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:51,336 INFO L175 Difference]: Start difference. First operand has 711 places, 1820 transitions, 52524 flow. Second operand 29 states and 1925 transitions. [2023-08-26 20:10:51,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 1941 transitions, 58900 flow [2023-08-26 20:10:56,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 1941 transitions, 56852 flow, removed 933 selfloop flow, removed 20 redundant places. [2023-08-26 20:10:56,888 INFO L231 Difference]: Finished difference. Result has 720 places, 1851 transitions, 52862 flow [2023-08-26 20:10:56,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=49408, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=52862, PETRI_PLACES=720, PETRI_TRANSITIONS=1851} [2023-08-26 20:10:56,889 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 692 predicate places. [2023-08-26 20:10:56,889 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 1851 transitions, 52862 flow [2023-08-26 20:10:56,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.81818181818182) internal successors, (1404), 22 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:56,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:10:56,890 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:10:56,894 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 20:10:57,090 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,SelfDestructingSolverStorable36 [2023-08-26 20:10:57,090 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 20:10:57,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:10:57,091 INFO L85 PathProgramCache]: Analyzing trace with hash -408981047, now seen corresponding path program 31 times [2023-08-26 20:10:57,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:10:57,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769338112] [2023-08-26 20:10:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:10:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:10:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:10:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:57,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:10:57,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769338112] [2023-08-26 20:10:57,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769338112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:10:57,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359858504] [2023-08-26 20:10:57,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 20:10:57,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:10:57,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:10:57,398 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 20:10:57,399 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 20:10:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:10:57,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 20:10:57,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:10:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:57,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:10:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:10:57,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359858504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:10:57,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:10:57,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-26 20:10:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113440579] [2023-08-26 20:10:57,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:10:57,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 20:10:57,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:10:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 20:10:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-08-26 20:10:57,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:10:57,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 1851 transitions, 52862 flow. Second operand has 25 states, 25 states have (on average 63.88) internal successors, (1597), 25 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:57,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:10:57,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:10:57,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:11:04,213 INFO L124 PetriNetUnfolderBase]: 4893/8336 cut-off events. [2023-08-26 20:11:04,213 INFO L125 PetriNetUnfolderBase]: For 550613/550613 co-relation queries the response was YES. [2023-08-26 20:11:04,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112060 conditions, 8336 events. 4893/8336 cut-off events. For 550613/550613 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 58611 event pairs, 696 based on Foata normal form. 28/8364 useless extension candidates. Maximal degree in co-relation 111822. Up to 7311 conditions per place. [2023-08-26 20:11:04,380 INFO L140 encePairwiseOnDemand]: 162/171 looper letters, 1737 selfloop transitions, 289 changer transitions 14/2040 dead transitions. [2023-08-26 20:11:04,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 2040 transitions, 61935 flow [2023-08-26 20:11:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-26 20:11:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-26 20:11:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2673 transitions. [2023-08-26 20:11:04,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907894736842105 [2023-08-26 20:11:04,383 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2673 transitions. [2023-08-26 20:11:04,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2673 transitions. [2023-08-26 20:11:04,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:11:04,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2673 transitions. [2023-08-26 20:11:04,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 66.825) internal successors, (2673), 40 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:04,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 171.0) internal successors, (7011), 41 states have internal predecessors, (7011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:04,390 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 171.0) internal successors, (7011), 41 states have internal predecessors, (7011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:04,390 INFO L175 Difference]: Start difference. First operand has 720 places, 1851 transitions, 52862 flow. Second operand 40 states and 2673 transitions. [2023-08-26 20:11:04,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 2040 transitions, 61935 flow [2023-08-26 20:11:10,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 2040 transitions, 61103 flow, removed 297 selfloop flow, removed 21 redundant places. [2023-08-26 20:11:10,402 INFO L231 Difference]: Finished difference. Result has 750 places, 1924 transitions, 55758 flow [2023-08-26 20:11:10,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=52050, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=55758, PETRI_PLACES=750, PETRI_TRANSITIONS=1924} [2023-08-26 20:11:10,404 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 722 predicate places. [2023-08-26 20:11:10,404 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 1924 transitions, 55758 flow [2023-08-26 20:11:10,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 63.88) internal successors, (1597), 25 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:10,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:11:10,404 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:11:10,409 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 20:11:10,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 20:11:10,605 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 20:11:10,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:11:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 15162313, now seen corresponding path program 32 times [2023-08-26 20:11:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:11:10,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209579879] [2023-08-26 20:11:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:11:10,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:11:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:11:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:10,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:11:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209579879] [2023-08-26 20:11:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209579879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:11:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058033219] [2023-08-26 20:11:10,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:11:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:11:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:11:10,838 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 20:11:10,839 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 20:11:10,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:11:10,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:11:10,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:11:10,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:11:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:11,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:11:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:11,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058033219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:11:11,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:11:11,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-26 20:11:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465132964] [2023-08-26 20:11:11,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:11:11,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 20:11:11,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:11:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 20:11:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-26 20:11:11,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:11:11,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1924 transitions, 55758 flow. Second operand has 18 states, 18 states have (on average 63.77777777777778) internal successors, (1148), 18 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:11,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:11:11,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:11:11,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:11:13,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:11:16,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:11:21,953 INFO L124 PetriNetUnfolderBase]: 5181/8813 cut-off events. [2023-08-26 20:11:21,953 INFO L125 PetriNetUnfolderBase]: For 688662/688662 co-relation queries the response was YES. [2023-08-26 20:11:22,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123474 conditions, 8813 events. 5181/8813 cut-off events. For 688662/688662 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 62444 event pairs, 1214 based on Foata normal form. 44/8857 useless extension candidates. Maximal degree in co-relation 123227. Up to 7618 conditions per place. [2023-08-26 20:11:22,129 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 1750 selfloop transitions, 386 changer transitions 8/2144 dead transitions. [2023-08-26 20:11:22,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 2144 transitions, 67933 flow [2023-08-26 20:11:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 20:11:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 20:11:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2199 transitions. [2023-08-26 20:11:22,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896863370547581 [2023-08-26 20:11:22,132 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2199 transitions. [2023-08-26 20:11:22,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2199 transitions. [2023-08-26 20:11:22,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:11:22,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2199 transitions. [2023-08-26 20:11:22,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 66.63636363636364) internal successors, (2199), 33 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:22,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:22,137 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:22,137 INFO L175 Difference]: Start difference. First operand has 750 places, 1924 transitions, 55758 flow. Second operand 33 states and 2199 transitions. [2023-08-26 20:11:22,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 782 places, 2144 transitions, 67933 flow [2023-08-26 20:11:28,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 2144 transitions, 64938 flow, removed 1383 selfloop flow, removed 15 redundant places. [2023-08-26 20:11:28,538 INFO L231 Difference]: Finished difference. Result has 782 places, 2042 transitions, 59670 flow [2023-08-26 20:11:28,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=53970, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=59670, PETRI_PLACES=782, PETRI_TRANSITIONS=2042} [2023-08-26 20:11:28,540 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 754 predicate places. [2023-08-26 20:11:28,540 INFO L495 AbstractCegarLoop]: Abstraction has has 782 places, 2042 transitions, 59670 flow [2023-08-26 20:11:28,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.77777777777778) internal successors, (1148), 18 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:28,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:11:28,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:11:28,549 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 20:11:28,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-26 20:11:28,745 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 20:11:28,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:11:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash -109851325, now seen corresponding path program 33 times [2023-08-26 20:11:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:11:28,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672893496] [2023-08-26 20:11:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:11:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:11:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:11:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:11:28,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672893496] [2023-08-26 20:11:28,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672893496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:11:28,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152798518] [2023-08-26 20:11:28,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:11:28,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:11:28,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:11:28,998 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 20:11:29,000 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 20:11:29,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 20:11:29,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:11:29,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 20:11:29,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:11:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:29,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:11:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:29,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152798518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:11:29,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:11:29,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-26 20:11:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015596023] [2023-08-26 20:11:29,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:11:29,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 20:11:29,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:11:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 20:11:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-08-26 20:11:29,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:11:29,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 2042 transitions, 59670 flow. Second operand has 22 states, 22 states have (on average 63.68181818181818) internal successors, (1401), 22 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:29,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:11:29,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:11:29,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:11:39,088 INFO L124 PetriNetUnfolderBase]: 5809/9979 cut-off events. [2023-08-26 20:11:39,089 INFO L125 PetriNetUnfolderBase]: For 830026/830026 co-relation queries the response was YES. [2023-08-26 20:11:39,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140008 conditions, 9979 events. 5809/9979 cut-off events. For 830026/830026 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 73460 event pairs, 624 based on Foata normal form. 78/10057 useless extension candidates. Maximal degree in co-relation 139746. Up to 7058 conditions per place. [2023-08-26 20:11:39,305 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 1687 selfloop transitions, 724 changer transitions 23/2434 dead transitions. [2023-08-26 20:11:39,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 2434 transitions, 76705 flow [2023-08-26 20:11:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-26 20:11:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-26 20:11:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3121 transitions. [2023-08-26 20:11:39,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38832897847455516 [2023-08-26 20:11:39,308 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3121 transitions. [2023-08-26 20:11:39,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3121 transitions. [2023-08-26 20:11:39,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:11:39,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3121 transitions. [2023-08-26 20:11:39,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 66.40425531914893) internal successors, (3121), 47 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:39,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:39,315 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:39,315 INFO L175 Difference]: Start difference. First operand has 782 places, 2042 transitions, 59670 flow. Second operand 47 states and 3121 transitions. [2023-08-26 20:11:39,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 2434 transitions, 76705 flow [2023-08-26 20:11:48,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 2434 transitions, 74464 flow, removed 1018 selfloop flow, removed 11 redundant places. [2023-08-26 20:11:48,093 INFO L231 Difference]: Finished difference. Result has 833 places, 2231 transitions, 67161 flow [2023-08-26 20:11:48,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=57718, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=67161, PETRI_PLACES=833, PETRI_TRANSITIONS=2231} [2023-08-26 20:11:48,095 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 805 predicate places. [2023-08-26 20:11:48,095 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 2231 transitions, 67161 flow [2023-08-26 20:11:48,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.68181818181818) internal successors, (1401), 22 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:48,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:11:48,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:11:48,105 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 20:11:48,301 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,SelfDestructingSolverStorable39 [2023-08-26 20:11:48,301 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 20:11:48,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:11:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash -820064355, now seen corresponding path program 34 times [2023-08-26 20:11:48,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:11:48,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710711682] [2023-08-26 20:11:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:11:48,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:11:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:11:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:48,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:11:48,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710711682] [2023-08-26 20:11:48,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710711682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:11:48,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228299237] [2023-08-26 20:11:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:11:48,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:11:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:11:48,595 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 20:11:48,596 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 20:11:48,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:11:48,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:11:48,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 20:11:48,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:11:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:48,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:11:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:11:49,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228299237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:11:49,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:11:49,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-26 20:11:49,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627832096] [2023-08-26 20:11:49,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:11:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 20:11:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:11:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 20:11:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-08-26 20:11:49,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:11:49,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 2231 transitions, 67161 flow. Second operand has 20 states, 20 states have (on average 63.55) internal successors, (1271), 20 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:49,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:11:49,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:11:49,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:11:52,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:11:59,838 INFO L124 PetriNetUnfolderBase]: 5790/9914 cut-off events. [2023-08-26 20:11:59,838 INFO L125 PetriNetUnfolderBase]: For 793898/793898 co-relation queries the response was YES. [2023-08-26 20:12:00,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141894 conditions, 9914 events. 5790/9914 cut-off events. For 793898/793898 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 72669 event pairs, 1241 based on Foata normal form. 20/9934 useless extension candidates. Maximal degree in co-relation 141614. Up to 8159 conditions per place. [2023-08-26 20:12:00,092 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 1783 selfloop transitions, 521 changer transitions 5/2309 dead transitions. [2023-08-26 20:12:00,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 857 places, 2309 transitions, 73851 flow [2023-08-26 20:12:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-26 20:12:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-26 20:12:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1720 transitions. [2023-08-26 20:12:00,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38686459739091317 [2023-08-26 20:12:00,094 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1720 transitions. [2023-08-26 20:12:00,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1720 transitions. [2023-08-26 20:12:00,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:12:00,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1720 transitions. [2023-08-26 20:12:00,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.15384615384616) internal successors, (1720), 26 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:12:00,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 171.0) internal successors, (4617), 27 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:12:00,099 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 171.0) internal successors, (4617), 27 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:12:00,099 INFO L175 Difference]: Start difference. First operand has 833 places, 2231 transitions, 67161 flow. Second operand 26 states and 1720 transitions. [2023-08-26 20:12:00,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 857 places, 2309 transitions, 73851 flow [2023-08-26 20:12:09,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 842 places, 2309 transitions, 71780 flow, removed 968 selfloop flow, removed 15 redundant places. [2023-08-26 20:12:09,449 INFO L231 Difference]: Finished difference. Result has 844 places, 2241 transitions, 67134 flow [2023-08-26 20:12:09,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=64719, PETRI_DIFFERENCE_MINUEND_PLACES=817, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=67134, PETRI_PLACES=844, PETRI_TRANSITIONS=2241} [2023-08-26 20:12:09,451 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 816 predicate places. [2023-08-26 20:12:09,451 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 2241 transitions, 67134 flow [2023-08-26 20:12:09,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.55) internal successors, (1271), 20 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:12:09,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:12:09,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:12:09,456 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 20:12:09,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:12:09,652 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 20:12:09,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:12:09,653 INFO L85 PathProgramCache]: Analyzing trace with hash 654065374, now seen corresponding path program 35 times [2023-08-26 20:12:09,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:12:09,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462293866] [2023-08-26 20:12:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:12:09,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:12:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:12:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:12:10,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:12:10,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462293866] [2023-08-26 20:12:10,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462293866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:12:10,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083654061] [2023-08-26 20:12:10,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 20:12:10,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:12:10,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:12:10,140 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 20:12:10,141 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 20:12:10,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 20:12:10,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:12:10,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 20:12:10,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:12:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:12:10,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:12:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:12:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083654061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:12:20,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:12:20,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-26 20:12:20,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167098417] [2023-08-26 20:12:20,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:12:20,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 20:12:20,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:12:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 20:12:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2023-08-26 20:12:20,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 171 [2023-08-26 20:12:20,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 2241 transitions, 67134 flow. Second operand has 26 states, 26 states have (on average 67.96153846153847) internal successors, (1767), 26 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:12:20,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:12:20,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 171 [2023-08-26 20:12:20,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:12:47,452 WARN L234 SmtUtils]: Spent 18.43s on a formula simplification. DAG size of input: 87 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:13:03,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:13:41,827 WARN L234 SmtUtils]: Spent 31.35s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:13:48,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:14:00,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:14:02,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:14:05,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:14:06,487 INFO L124 PetriNetUnfolderBase]: 8169/14310 cut-off events. [2023-08-26 20:14:06,487 INFO L125 PetriNetUnfolderBase]: For 1285727/1285728 co-relation queries the response was YES. [2023-08-26 20:14:06,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211527 conditions, 14310 events. 8169/14310 cut-off events. For 1285727/1285728 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 114530 event pairs, 207 based on Foata normal form. 16/14325 useless extension candidates. Maximal degree in co-relation 211246. Up to 6203 conditions per place. [2023-08-26 20:14:06,933 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 1836 selfloop transitions, 1306 changer transitions 202/3348 dead transitions. [2023-08-26 20:14:06,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 3348 transitions, 109748 flow [2023-08-26 20:14:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 20:14:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 20:14:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1617 transitions. [2023-08-26 20:14:06,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-08-26 20:14:06,935 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1617 transitions. [2023-08-26 20:14:06,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1617 transitions. [2023-08-26 20:14:06,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:14:06,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1617 transitions. [2023-08-26 20:14:06,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 73.5) internal successors, (1617), 22 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:14:06,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:14:06,938 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:14:06,938 INFO L175 Difference]: Start difference. First operand has 844 places, 2241 transitions, 67134 flow. Second operand 22 states and 1617 transitions. [2023-08-26 20:14:06,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 3348 transitions, 109748 flow [2023-08-26 20:14:22,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 847 places, 3348 transitions, 109085 flow, removed 245 selfloop flow, removed 17 redundant places. [2023-08-26 20:14:22,499 INFO L231 Difference]: Finished difference. Result has 861 places, 2751 transitions, 87362 flow [2023-08-26 20:14:22,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=66647, PETRI_DIFFERENCE_MINUEND_PLACES=826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=87362, PETRI_PLACES=861, PETRI_TRANSITIONS=2751} [2023-08-26 20:14:22,502 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 833 predicate places. [2023-08-26 20:14:22,502 INFO L495 AbstractCegarLoop]: Abstraction has has 861 places, 2751 transitions, 87362 flow [2023-08-26 20:14:22,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 67.96153846153847) internal successors, (1767), 26 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:14:22,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:14:22,502 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:14:22,511 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 20:14:22,707 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,SelfDestructingSolverStorable41 [2023-08-26 20:14:22,708 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 20:14:22,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:14:22,708 INFO L85 PathProgramCache]: Analyzing trace with hash 964914990, now seen corresponding path program 36 times [2023-08-26 20:14:22,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:14:22,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186223219] [2023-08-26 20:14:22,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:14:22,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:14:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:14:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:14:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:14:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186223219] [2023-08-26 20:14:22,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186223219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:14:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947406765] [2023-08-26 20:14:22,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 20:14:22,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:14:22,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:14:22,886 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:14:22,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-26 20:14:22,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-26 20:14:22,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:14:22,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 20:14:22,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:14:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:14:23,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:14:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:14:23,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947406765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:14:23,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:14:23,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 23 [2023-08-26 20:14:23,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113061574] [2023-08-26 20:14:23,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:14:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 20:14:23,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:14:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 20:14:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-08-26 20:14:23,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:14:23,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 861 places, 2751 transitions, 87362 flow. Second operand has 24 states, 24 states have (on average 63.875) internal successors, (1533), 24 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:14:23,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:14:23,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:14:23,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:14:47,167 INFO L124 PetriNetUnfolderBase]: 8988/15405 cut-off events. [2023-08-26 20:14:47,167 INFO L125 PetriNetUnfolderBase]: For 1626130/1626130 co-relation queries the response was YES. [2023-08-26 20:14:47,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247936 conditions, 15405 events. 8988/15405 cut-off events. For 1626130/1626130 co-relation queries the response was YES. Maximal size of possible extension queue 1207. Compared 121331 event pairs, 206 based on Foata normal form. 118/15523 useless extension candidates. Maximal degree in co-relation 247641. Up to 12460 conditions per place. [2023-08-26 20:14:47,546 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 2210 selfloop transitions, 1159 changer transitions 69/3438 dead transitions. [2023-08-26 20:14:47,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 912 places, 3438 transitions, 122127 flow [2023-08-26 20:14:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-26 20:14:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-26 20:14:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3520 transitions. [2023-08-26 20:14:47,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839236455919673 [2023-08-26 20:14:47,549 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3520 transitions. [2023-08-26 20:14:47,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3520 transitions. [2023-08-26 20:14:47,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:14:47,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3520 transitions. [2023-08-26 20:14:47,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 66.41509433962264) internal successors, (3520), 53 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:14:47,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 171.0) internal successors, (9234), 54 states have internal predecessors, (9234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:14:47,559 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 171.0) internal successors, (9234), 54 states have internal predecessors, (9234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:14:47,559 INFO L175 Difference]: Start difference. First operand has 861 places, 2751 transitions, 87362 flow. Second operand 53 states and 3520 transitions. [2023-08-26 20:14:47,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 912 places, 3438 transitions, 122127 flow [2023-08-26 20:15:08,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 898 places, 3438 transitions, 118682 flow, removed 1685 selfloop flow, removed 14 redundant places. [2023-08-26 20:15:08,421 INFO L231 Difference]: Finished difference. Result has 916 places, 3201 transitions, 107870 flow [2023-08-26 20:15:08,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=85309, PETRI_DIFFERENCE_MINUEND_PLACES=846, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=766, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=107870, PETRI_PLACES=916, PETRI_TRANSITIONS=3201} [2023-08-26 20:15:08,423 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 888 predicate places. [2023-08-26 20:15:08,423 INFO L495 AbstractCegarLoop]: Abstraction has has 916 places, 3201 transitions, 107870 flow [2023-08-26 20:15:08,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 63.875) internal successors, (1533), 24 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:15:08,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:15:08,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:15:08,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-26 20:15:08,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:15:08,624 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 20:15:08,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:15:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash -357630846, now seen corresponding path program 37 times [2023-08-26 20:15:08,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:15:08,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459078547] [2023-08-26 20:15:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:15:08,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:15:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:15:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:15:08,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:15:08,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459078547] [2023-08-26 20:15:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459078547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:15:08,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37267516] [2023-08-26 20:15:08,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 20:15:08,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:15:08,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:15:08,952 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:15:08,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-26 20:15:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:15:09,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 20:15:09,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:15:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:15:09,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:15:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:15:09,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37267516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:15:09,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:15:09,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-26 20:15:09,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030940282] [2023-08-26 20:15:09,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:15:09,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-26 20:15:09,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:15:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-26 20:15:09,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2023-08-26 20:15:09,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:15:09,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 916 places, 3201 transitions, 107870 flow. Second operand has 27 states, 27 states have (on average 63.592592592592595) internal successors, (1717), 27 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:15:09,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:15:09,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:15:09,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:15:35,538 INFO L124 PetriNetUnfolderBase]: 10292/17228 cut-off events. [2023-08-26 20:15:35,538 INFO L125 PetriNetUnfolderBase]: For 1814898/1814898 co-relation queries the response was YES. [2023-08-26 20:15:36,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283384 conditions, 17228 events. 10292/17228 cut-off events. For 1814898/1814898 co-relation queries the response was YES. Maximal size of possible extension queue 1309. Compared 133429 event pairs, 380 based on Foata normal form. 98/17326 useless extension candidates. Maximal degree in co-relation 283079. Up to 7311 conditions per place. [2023-08-26 20:15:36,391 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 1823 selfloop transitions, 1966 changer transitions 13/3802 dead transitions. [2023-08-26 20:15:36,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 949 places, 3802 transitions, 136808 flow [2023-08-26 20:15:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 20:15:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 20:15:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2383 transitions. [2023-08-26 20:15:36,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38710201429499674 [2023-08-26 20:15:36,394 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2383 transitions. [2023-08-26 20:15:36,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2383 transitions. [2023-08-26 20:15:36,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:15:36,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2383 transitions. [2023-08-26 20:15:36,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 66.19444444444444) internal successors, (2383), 36 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:15:36,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 171.0) internal successors, (6327), 37 states have internal predecessors, (6327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:15:36,399 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 171.0) internal successors, (6327), 37 states have internal predecessors, (6327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:15:36,400 INFO L175 Difference]: Start difference. First operand has 916 places, 3201 transitions, 107870 flow. Second operand 36 states and 2383 transitions. [2023-08-26 20:15:36,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 949 places, 3802 transitions, 136808 flow [2023-08-26 20:16:03,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 919 places, 3802 transitions, 131035 flow, removed 2781 selfloop flow, removed 30 redundant places. [2023-08-26 20:16:03,102 INFO L231 Difference]: Finished difference. Result has 926 places, 3627 transitions, 124956 flow [2023-08-26 20:16:03,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=102260, PETRI_DIFFERENCE_MINUEND_PLACES=884, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1587, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=124956, PETRI_PLACES=926, PETRI_TRANSITIONS=3627} [2023-08-26 20:16:03,104 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 898 predicate places. [2023-08-26 20:16:03,104 INFO L495 AbstractCegarLoop]: Abstraction has has 926 places, 3627 transitions, 124956 flow [2023-08-26 20:16:03,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 63.592592592592595) internal successors, (1717), 27 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:16:03,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:16:03,105 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:16:03,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-26 20:16:03,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:16:03,305 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 20:16:03,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:16:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash 477595822, now seen corresponding path program 38 times [2023-08-26 20:16:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:16:03,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823262891] [2023-08-26 20:16:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:16:03,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:16:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:16:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:16:03,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:16:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823262891] [2023-08-26 20:16:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823262891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:16:03,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421321252] [2023-08-26 20:16:03,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:16:03,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:16:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:16:03,717 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:16:03,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-26 20:16:03,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:16:03,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:16:03,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 20:16:03,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:16:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:16:04,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:16:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:16:04,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421321252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:16:04,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:16:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2023-08-26 20:16:04,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69502432] [2023-08-26 20:16:04,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:16:04,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 20:16:04,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:16:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 20:16:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-08-26 20:16:04,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:16:04,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 926 places, 3627 transitions, 124956 flow. Second operand has 24 states, 24 states have (on average 63.875) internal successors, (1533), 24 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:16:04,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:16:04,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:16:04,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:16:35,591 INFO L124 PetriNetUnfolderBase]: 10825/18131 cut-off events. [2023-08-26 20:16:35,591 INFO L125 PetriNetUnfolderBase]: For 2068356/2068356 co-relation queries the response was YES. [2023-08-26 20:16:35,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303043 conditions, 18131 events. 10825/18131 cut-off events. For 2068356/2068356 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 141659 event pairs, 474 based on Foata normal form. 144/18275 useless extension candidates. Maximal degree in co-relation 302737. Up to 8644 conditions per place. [2023-08-26 20:16:36,069 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 2582 selfloop transitions, 1381 changer transitions 6/3969 dead transitions. [2023-08-26 20:16:36,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 972 places, 3969 transitions, 146580 flow [2023-08-26 20:16:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-26 20:16:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-26 20:16:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3239 transitions. [2023-08-26 20:16:36,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38656164220073996 [2023-08-26 20:16:36,072 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3239 transitions. [2023-08-26 20:16:36,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3239 transitions. [2023-08-26 20:16:36,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:16:36,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3239 transitions. [2023-08-26 20:16:36,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 66.10204081632654) internal successors, (3239), 49 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:16:36,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 171.0) internal successors, (8550), 50 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:16:36,078 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 171.0) internal successors, (8550), 50 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:16:36,078 INFO L175 Difference]: Start difference. First operand has 926 places, 3627 transitions, 124956 flow. Second operand 49 states and 3239 transitions. [2023-08-26 20:16:36,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 972 places, 3969 transitions, 146580 flow [2023-08-26 20:17:07,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 949 places, 3969 transitions, 139371 flow, removed 3122 selfloop flow, removed 23 redundant places. [2023-08-26 20:17:07,553 INFO L231 Difference]: Finished difference. Result has 971 places, 3860 transitions, 133922 flow [2023-08-26 20:17:07,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=119743, PETRI_DIFFERENCE_MINUEND_PLACES=901, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=133922, PETRI_PLACES=971, PETRI_TRANSITIONS=3860} [2023-08-26 20:17:07,555 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 943 predicate places. [2023-08-26 20:17:07,555 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 3860 transitions, 133922 flow [2023-08-26 20:17:07,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 63.875) internal successors, (1533), 24 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:17:07,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:17:07,556 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:17:07,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-26 20:17:07,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-26 20:17:07,757 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 20:17:07,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:17:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash 326555738, now seen corresponding path program 39 times [2023-08-26 20:17:07,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:17:07,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252125800] [2023-08-26 20:17:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:17:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:17:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:17:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:17:08,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:17:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252125800] [2023-08-26 20:17:08,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252125800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:17:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546220383] [2023-08-26 20:17:08,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:17:08,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:17:08,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:17:08,289 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:17:08,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-26 20:17:08,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 20:17:08,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:17:08,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-26 20:17:08,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:17:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:17:09,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:17:43,663 WARN L234 SmtUtils]: Spent 15.58s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:18:45,532 WARN L234 SmtUtils]: Spent 52.20s on a formula simplification. DAG size of input: 145 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:18:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:18:45,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546220383] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:18:45,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:18:45,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-08-26 20:18:45,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569083708] [2023-08-26 20:18:45,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:18:45,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 20:18:45,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:18:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 20:18:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-08-26 20:18:45,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 171 [2023-08-26 20:18:45,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 3860 transitions, 133922 flow. Second operand has 26 states, 26 states have (on average 63.96153846153846) internal successors, (1663), 26 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:18:45,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:18:45,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 171 [2023-08-26 20:18:45,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:44,688 WARN L234 SmtUtils]: Spent 1.93m on a formula simplification. DAG size of input: 179 DAG size of output: 176 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:20:46,824 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 2 (mod c_~C~0 2147483648)))) (let ((.cse14 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse4 (+ .cse5 c_~counter~0))) (let ((.cse7 (* c_~C~0 2)) (.cse0 (< 4294967294 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296))) (.cse2 (+ c_~counter~0 (mod c_~C~0 4294967296))) (.cse13 (or (< c_thread2Thread1of1ForFork1_~i~1 (+ (* 4294967296 (div (+ c_thread2Thread1of1ForFork1_~i~1 (- 4294967295)) 4294967296)) .cse14 4294967296)) (< 0 (mod c_~counter~0 4294967296)) (< (+ 4294967295 (* (div (+ (- 1) .cse5 c_~counter~0) 4294967296) 4294967296)) .cse4))) (.cse9 (* 4294967296 (div c_~C~0 4294967296))) (.cse11 (< c_thread2Thread1of1ForFork1_~i~1 (+ 4294967295 (* (div (+ c_thread2Thread1of1ForFork1_~i~1 (- 4294967294)) 4294967296) 4294967296) .cse14))) (.cse12 (* (- 1) c_~C~0))) (and (= c_thread1Thread1of1ForFork0_~i~0 0) (or .cse0 (let ((.cse6 (* (- 2) c_~C~0))) (let ((.cse10 (* (div (+ .cse6 c_~counter~0) 4294967296) 4294967296))) (let ((.cse1 (+ 4294967295 .cse7 .cse10)) (.cse3 (< c_thread2Thread1of1ForFork1_~i~1 (+ 4294967294 .cse14 (* 4294967296 (div (+ c_thread2Thread1of1ForFork1_~i~1 (- 4294967293)) 4294967296)))))) (and (or (< .cse1 .cse2) .cse3 (< .cse4 (+ (* (div (+ .cse5 .cse6 c_~counter~0) 4294967296) 4294967296) .cse7 1))) (or (let ((.cse8 (< c_~counter~0 (+ c_~C~0 4294967297 .cse9 .cse10)))) (and (or (< .cse1 .cse4) .cse8) (or .cse8 (< (+ 4294967295 .cse7 (* (div (+ .cse5 .cse6 c_~counter~0 (- 4294967297)) 4294967296) 4294967296)) c_~counter~0)))) .cse3) (or (< 0 (mod (+ c_~counter~0 (* c_~C~0 4294967295)) 4294967296)) .cse11 (< (+ c_~C~0 4294967295 (* 4294967296 (div (+ (- 1) .cse5 c_~counter~0 .cse12) 4294967296))) .cse4)) .cse13))))) (= c_~counter~0 0) (or (let ((.cse15 (+ c_~C~0 c_~counter~0))) (< .cse15 (+ (* (div .cse15 4294967296) 4294967296) 1))) .cse0 (< (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296) (+ .cse14 1)) (<= (mod (+ c_~counter~0 .cse7) 4294967296) 0)) (or .cse0 (let ((.cse18 (* (div (+ c_~counter~0 .cse12) 4294967296) 4294967296))) (let ((.cse16 (+ c_~C~0 4294967295 .cse18))) (and (or (< .cse16 .cse2) (< .cse4 (+ c_~C~0 (* (div (+ .cse5 c_~counter~0 .cse12) 4294967296) 4294967296) 1)) .cse11) .cse13 (or (let ((.cse17 (< c_~counter~0 (+ 4294967297 .cse18 .cse9)))) (and (or .cse17 (< (+ c_~C~0 4294967295 (* 4294967296 (div (+ .cse5 c_~counter~0 (- 4294967297) .cse12) 4294967296))) c_~counter~0)) (or (< .cse16 .cse4) .cse17))) .cse11))))))))) is different from false [2023-08-26 20:20:57,248 WARN L234 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 92 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:20:59,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:21:01,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 20:21:03,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-08-26 20:21:41,529 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:21:41,529 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:21:41,720 WARN L266 SmtUtils]: Removed 10 from assertion stack [2023-08-26 20:21:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 20:21:41,721 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 20:21:41,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-26 20:21:41,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-26 20:21:41,922 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 20:21:41,924 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 20:21:41,924 INFO L445 BasicCegarLoop]: Path program histogram: [39, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:21:41,927 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:21:41,927 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:21:41,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:21:41 BasicIcfg [2023-08-26 20:21:41,929 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:21:41,929 INFO L158 Benchmark]: Toolchain (without parser) took 824957.70ms. Allocated memory was 362.8MB in the beginning and 8.1GB in the end (delta: 7.8GB). Free memory was 316.8MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2023-08-26 20:21:41,929 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 362.8MB. Free memory was 340.3MB in the beginning and 340.1MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:21:41,929 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.32ms. Allocated memory is still 362.8MB. Free memory was 316.8MB in the beginning and 306.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 20:21:41,929 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.88ms. Allocated memory is still 362.8MB. Free memory was 306.4MB in the beginning and 304.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:21:41,930 INFO L158 Benchmark]: Boogie Preprocessor took 20.17ms. Allocated memory is still 362.8MB. Free memory was 304.3MB in the beginning and 303.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:21:41,930 INFO L158 Benchmark]: RCFGBuilder took 468.24ms. Allocated memory is still 362.8MB. Free memory was 303.2MB in the beginning and 287.5MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 20:21:41,930 INFO L158 Benchmark]: TraceAbstraction took 824246.14ms. Allocated memory was 362.8MB in the beginning and 8.1GB in the end (delta: 7.8GB). Free memory was 286.4MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2023-08-26 20:21:41,931 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 362.8MB. Free memory was 340.3MB in the beginning and 340.1MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 190.32ms. Allocated memory is still 362.8MB. Free memory was 316.8MB in the beginning and 306.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.88ms. Allocated memory is still 362.8MB. Free memory was 306.4MB in the beginning and 304.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.17ms. Allocated memory is still 362.8MB. Free memory was 304.3MB in the beginning and 303.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 468.24ms. Allocated memory is still 362.8MB. Free memory was 303.2MB in the beginning and 287.5MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 824246.14ms. Allocated memory was 362.8MB in the beginning and 8.1GB in the end (delta: 7.8GB). Free memory was 286.4MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 79 PlacesBefore, 28 PlacesAfterwards, 78 TransitionsBefore, 23 TransitionsAfterwards, 580 CoEnabledTransitionPairs, 6 FixpointIterations, 46 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 82 TotalNumberOfCompositions, 672 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 655, independent: 653, independent conditional: 0, independent unconditional: 653, 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: 301, independent: 299, independent conditional: 0, independent unconditional: 299, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 655, independent: 354, independent conditional: 0, independent unconditional: 354, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 301, unknown conditional: 0, unknown unconditional: 301] , 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 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 224 for 29797ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 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: 824.1s, OverallIterations: 46, TraceHistogramMax: 3, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.0s, AutomataDifference: 672.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 3833 SdHoareTripleChecker+Valid, 65.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3833 mSDsluCounter, 635 SdHoareTripleChecker+Invalid, 62.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 66 IncrementalHoareTripleChecker+Unchecked, 451 mSDsCounter, 1255 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21189 IncrementalHoareTripleChecker+Invalid, 22521 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1255 mSolverCounterUnsat, 184 mSDtfsCounter, 21189 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2546 GetRequests, 1072 SyntacticMatches, 45 SemanticMatches, 1428 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16164 ImplicationChecksByTransitivity, 375.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133922occurred in iteration=45, InterpolantAutomatonStates: 1197, 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, 1.6s SatisfiabilityAnalysisTime, 137.0s InterpolantComputationTime, 1402 NumberOfCodeBlocks, 1391 NumberOfCodeBlocksAsserted, 139 NumberOfCheckSat, 1957 ConstructedInterpolants, 1 QuantifiedInterpolants, 21901 SizeOfPredicates, 321 NumberOfNonLiveVariables, 5248 ConjunctsInSsa, 592 ConjunctsInUnsatCore, 124 InterpolantComputations, 7 PerfectInterpolantSequences, 168/883 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown