/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:44:40,620 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:44:40,701 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 16:44:40,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:44:40,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:44:40,736 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:44:40,736 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:44:40,741 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:44:40,741 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:44:40,745 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:44:40,745 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:44:40,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:44:40,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:44:40,747 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:44:40,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:44:40,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:44:40,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:44:40,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:44:40,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:44:40,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:44:40,748 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:44:40,749 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:44:40,749 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:44:40,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:44:40,750 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:44:40,750 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:44:40,750 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:44:40,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:44:40,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:44:40,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:44:40,752 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:44:40,752 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:44:40,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:44:40,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:44:40,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:44:40,753 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:44:41,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:44:41,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:44:41,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:44:41,085 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:44:41,085 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:44:41,086 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-26 16:44:42,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:44:42,440 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:44:42,440 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-26 16:44:42,448 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23456d26/2e563a8f8ddc4c16b82d5e041e08a3aa/FLAGb2e852bd3 [2023-08-26 16:44:42,460 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23456d26/2e563a8f8ddc4c16b82d5e041e08a3aa [2023-08-26 16:44:42,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:44:42,463 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:44:42,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:44:42,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:44:42,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:44:42,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc2f8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42, skipping insertion in model container [2023-08-26 16:44:42,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,492 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:44:42,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:44:42,676 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:44:42,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:44:42,719 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 16:44:42,720 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 16:44:42,725 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:44:42,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42 WrapperNode [2023-08-26 16:44:42,726 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:44:42,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:44:42,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:44:42,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:44:42,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,767 INFO L138 Inliner]: procedures = 21, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 16:44:42,768 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:44:42,769 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:44:42,769 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:44:42,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:44:42,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,781 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,793 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,796 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,797 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,798 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:44:42,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:44:42,800 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:44:42,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:44:42,801 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (1/1) ... [2023-08-26 16:44:42,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:44:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:44:42,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 16:44:42,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 16:44:42,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:44:42,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 16:44:42,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 16:44:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 16:44:42,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 16:44:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:44:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:44:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:44:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 16:44:42,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 16:44:42,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:44:42,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:44:42,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 16:44:42,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:44:42,863 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 16:44:42,938 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:44:42,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:44:43,210 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:44:43,227 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:44:43,227 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 16:44:43,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:44:43 BoogieIcfgContainer [2023-08-26 16:44:43,229 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:44:43,231 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:44:43,231 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:44:43,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:44:43,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:44:42" (1/3) ... [2023-08-26 16:44:43,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb2212e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:44:43, skipping insertion in model container [2023-08-26 16:44:43,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:44:42" (2/3) ... [2023-08-26 16:44:43,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb2212e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:44:43, skipping insertion in model container [2023-08-26 16:44:43,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:44:43" (3/3) ... [2023-08-26 16:44:43,236 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2023-08-26 16:44:43,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:44:43,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 16:44:43,252 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:44:43,346 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 16:44:43,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 112 transitions, 240 flow [2023-08-26 16:44:43,453 INFO L124 PetriNetUnfolderBase]: 8/110 cut-off events. [2023-08-26 16:44:43,454 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:44:43,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 110 events. 8/110 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-08-26 16:44:43,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 112 transitions, 240 flow [2023-08-26 16:44:43,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 101 transitions, 214 flow [2023-08-26 16:44:43,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:44:43,479 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 101 transitions, 214 flow [2023-08-26 16:44:43,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 101 transitions, 214 flow [2023-08-26 16:44:43,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 101 transitions, 214 flow [2023-08-26 16:44:43,522 INFO L124 PetriNetUnfolderBase]: 8/101 cut-off events. [2023-08-26 16:44:43,522 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:44:43,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 101 events. 8/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 96 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-08-26 16:44:43,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-26 16:44:46,878 INFO L134 LiptonReduction]: Checked pairs total: 1300 [2023-08-26 16:44:46,879 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-26 16:44:46,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 16:44:46,895 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;@558ee023, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:44:46,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 16:44:46,896 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:44:46,896 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 16:44:46,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:44:46,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:46,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 16:44:46,897 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 16:44:46,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash 442, now seen corresponding path program 1 times [2023-08-26 16:44:46,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:46,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998010728] [2023-08-26 16:44:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:46,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:46,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:46,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998010728] [2023-08-26 16:44:46,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998010728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:46,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:46,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 16:44:46,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696817850] [2023-08-26 16:44:46,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:46,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 16:44:46,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 16:44:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 16:44:47,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 229 [2023-08-26 16:44:47,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 54 flow. Second operand has 2 states, 2 states have (on average 101.5) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:47,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 229 [2023-08-26 16:44:47,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:47,053 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-26 16:44:47,054 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:44:47,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 80 events. 45/80 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 148 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 124. Up to 81 conditions per place. [2023-08-26 16:44:47,056 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-26 16:44:47,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 88 flow [2023-08-26 16:44:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 16:44:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 16:44:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2023-08-26 16:44:47,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868995633187773 [2023-08-26 16:44:47,067 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2023-08-26 16:44:47,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2023-08-26 16:44:47,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:47,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2023-08-26 16:44:47,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,076 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,077 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 54 flow. Second operand 2 states and 223 transitions. [2023-08-26 16:44:47,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 88 flow [2023-08-26 16:44:47,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 16:44:47,081 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 42 flow [2023-08-26 16:44:47,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-08-26 16:44:47,085 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 16:44:47,085 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 42 flow [2023-08-26 16:44:47,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 101.5) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:47,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:44:47,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:44:47,086 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 16:44:47,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:47,087 INFO L85 PathProgramCache]: Analyzing trace with hash 433229, now seen corresponding path program 1 times [2023-08-26 16:44:47,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:47,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369356293] [2023-08-26 16:44:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:47,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:47,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:47,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369356293] [2023-08-26 16:44:47,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369356293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:47,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:47,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:44:47,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828703085] [2023-08-26 16:44:47,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:47,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:44:47,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:47,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:44:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:44:47,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 229 [2023-08-26 16:44:47,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:47,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 229 [2023-08-26 16:44:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:47,238 INFO L124 PetriNetUnfolderBase]: 41/72 cut-off events. [2023-08-26 16:44:47,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:44:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 72 events. 41/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 128 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 147. Up to 72 conditions per place. [2023-08-26 16:44:47,241 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 16:44:47,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 72 flow [2023-08-26 16:44:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:44:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:44:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 16:44:47,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38573508005822416 [2023-08-26 16:44:47,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 16:44:47,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 16:44:47,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:47,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 16:44:47,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,252 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 42 flow. Second operand 3 states and 265 transitions. [2023-08-26 16:44:47,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 72 flow [2023-08-26 16:44:47,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:44:47,253 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 40 flow [2023-08-26 16:44:47,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=40, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-26 16:44:47,254 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 16:44:47,254 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 40 flow [2023-08-26 16:44:47,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:47,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:44:47,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:44:47,255 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 16:44:47,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:47,255 INFO L85 PathProgramCache]: Analyzing trace with hash 433230, now seen corresponding path program 1 times [2023-08-26 16:44:47,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:47,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003256588] [2023-08-26 16:44:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:47,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:47,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003256588] [2023-08-26 16:44:47,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003256588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:47,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:47,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:44:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110164038] [2023-08-26 16:44:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:47,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:44:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:44:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:44:47,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 229 [2023-08-26 16:44:47,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:47,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 229 [2023-08-26 16:44:47,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:47,392 INFO L124 PetriNetUnfolderBase]: 37/64 cut-off events. [2023-08-26 16:44:47,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:44:47,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 64 events. 37/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 110 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 132. Up to 64 conditions per place. [2023-08-26 16:44:47,393 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 16:44:47,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 16:44:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:44:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:44:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-26 16:44:47,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915574963609898 [2023-08-26 16:44:47,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-26 16:44:47,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-26 16:44:47,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:47,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-26 16:44:47,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,398 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 40 flow. Second operand 3 states and 269 transitions. [2023-08-26 16:44:47,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 16:44:47,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 65 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:44:47,399 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 37 flow [2023-08-26 16:44:47,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=37, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-08-26 16:44:47,400 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 16:44:47,400 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 37 flow [2023-08-26 16:44:47,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:47,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:44:47,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:44:47,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:47,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash 416341460, now seen corresponding path program 1 times [2023-08-26 16:44:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:47,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181420909] [2023-08-26 16:44:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:47,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:47,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181420909] [2023-08-26 16:44:47,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181420909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:47,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:47,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:44:47,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724379068] [2023-08-26 16:44:47,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:47,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:44:47,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:44:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:44:47,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 229 [2023-08-26 16:44:47,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 37 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:47,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 229 [2023-08-26 16:44:47,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:47,516 INFO L124 PetriNetUnfolderBase]: 29/52 cut-off events. [2023-08-26 16:44:47,516 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:44:47,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 52 events. 29/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 75 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 109. Up to 52 conditions per place. [2023-08-26 16:44:47,518 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 13 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2023-08-26 16:44:47,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 63 flow [2023-08-26 16:44:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:44:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:44:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-26 16:44:47,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36681222707423583 [2023-08-26 16:44:47,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-26 16:44:47,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-26 16:44:47,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:47,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-26 16:44:47,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,525 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 37 flow. Second operand 3 states and 252 transitions. [2023-08-26 16:44:47,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 63 flow [2023-08-26 16:44:47,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:44:47,526 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-26 16:44:47,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-26 16:44:47,527 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 16:44:47,528 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-26 16:44:47,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:47,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:44:47,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 16:44:47,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:47,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash 416341461, now seen corresponding path program 1 times [2023-08-26 16:44:47,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:47,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419556155] [2023-08-26 16:44:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:47,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:47,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:47,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419556155] [2023-08-26 16:44:47,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419556155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:47,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:47,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:44:47,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594379410] [2023-08-26 16:44:47,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:47,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:44:47,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:44:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:44:47,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 229 [2023-08-26 16:44:47,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:47,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 229 [2023-08-26 16:44:47,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:47,636 INFO L124 PetriNetUnfolderBase]: 21/40 cut-off events. [2023-08-26 16:44:47,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:44:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 40 events. 21/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 86. Up to 40 conditions per place. [2023-08-26 16:44:47,636 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 16:44:47,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 60 flow [2023-08-26 16:44:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:44:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:44:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-08-26 16:44:47,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38719068413391555 [2023-08-26 16:44:47,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-08-26 16:44:47,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-08-26 16:44:47,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:47,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-08-26 16:44:47,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,641 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 3 states and 266 transitions. [2023-08-26 16:44:47,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 60 flow [2023-08-26 16:44:47,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 59 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:44:47,642 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 35 flow [2023-08-26 16:44:47,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=35, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-08-26 16:44:47,642 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 16:44:47,643 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 35 flow [2023-08-26 16:44:47,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:47,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:47,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 16:44:47,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:47,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2020183612, now seen corresponding path program 1 times [2023-08-26 16:44:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:47,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619781339] [2023-08-26 16:44:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:47,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:47,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:47,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619781339] [2023-08-26 16:44:47,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619781339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:47,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:47,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:44:47,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808705884] [2023-08-26 16:44:47,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:47,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:44:47,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:44:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:44:47,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 229 [2023-08-26 16:44:47,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 35 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:47,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 229 [2023-08-26 16:44:47,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:47,826 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2023-08-26 16:44:47,826 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:44:47,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 77 events. 41/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 163. Up to 51 conditions per place. [2023-08-26 16:44:47,827 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-08-26 16:44:47,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 23 transitions, 104 flow [2023-08-26 16:44:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:44:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:44:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-26 16:44:47,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497816593886463 [2023-08-26 16:44:47,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-26 16:44:47,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-26 16:44:47,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:47,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-26 16:44:47,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,854 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 35 flow. Second operand 3 states and 309 transitions. [2023-08-26 16:44:47,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 23 transitions, 104 flow [2023-08-26 16:44:47,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:44:47,855 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 53 flow [2023-08-26 16:44:47,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 16:44:47,856 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2023-08-26 16:44:47,856 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 53 flow [2023-08-26 16:44:47,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:47,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:47,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 16:44:47,857 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:47,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1330109397, now seen corresponding path program 1 times [2023-08-26 16:44:47,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:47,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046574225] [2023-08-26 16:44:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:47,968 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 16:44:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046574225] [2023-08-26 16:44:47,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046574225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:47,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:47,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 16:44:47,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831092043] [2023-08-26 16:44:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:47,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:44:47,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:44:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:44:47,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 229 [2023-08-26 16:44:47,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:47,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:47,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 229 [2023-08-26 16:44:47,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:48,055 INFO L124 PetriNetUnfolderBase]: 49/99 cut-off events. [2023-08-26 16:44:48,056 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-26 16:44:48,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 99 events. 49/99 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 275 event pairs, 5 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 244. Up to 47 conditions per place. [2023-08-26 16:44:48,057 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 29 selfloop transitions, 7 changer transitions 2/38 dead transitions. [2023-08-26 16:44:48,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 38 transitions, 193 flow [2023-08-26 16:44:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:44:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:44:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 466 transitions. [2023-08-26 16:44:48,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069868995633188 [2023-08-26 16:44:48,059 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 466 transitions. [2023-08-26 16:44:48,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 466 transitions. [2023-08-26 16:44:48,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:48,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 466 transitions. [2023-08-26 16:44:48,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,063 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,063 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 53 flow. Second operand 5 states and 466 transitions. [2023-08-26 16:44:48,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 38 transitions, 193 flow [2023-08-26 16:44:48,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:44:48,064 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 106 flow [2023-08-26 16:44:48,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=50, 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=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-26 16:44:48,065 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-08-26 16:44:48,065 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 106 flow [2023-08-26 16:44:48,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:48,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:48,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 16:44:48,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:48,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash -300748447, now seen corresponding path program 2 times [2023-08-26 16:44:48,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:48,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913444474] [2023-08-26 16:44:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913444474] [2023-08-26 16:44:48,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913444474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:44:48,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787568871] [2023-08-26 16:44:48,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:44:48,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:44:48,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:44:48,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:44:48,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 16:44:48,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:44:48,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:44:48,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 16:44:48,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:44:48,511 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 16:44:48,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 16:44:48,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787568871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:48,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 16:44:48,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-26 16:44:48,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157270614] [2023-08-26 16:44:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:48,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:44:48,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:44:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 16:44:48,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-26 16:44:48,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:48,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-26 16:44:48,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:48,581 INFO L124 PetriNetUnfolderBase]: 45/93 cut-off events. [2023-08-26 16:44:48,581 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-26 16:44:48,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 93 events. 45/93 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 230 event pairs, 11 based on Foata normal form. 4/97 useless extension candidates. Maximal degree in co-relation 307. Up to 59 conditions per place. [2023-08-26 16:44:48,582 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 20 selfloop transitions, 6 changer transitions 6/32 dead transitions. [2023-08-26 16:44:48,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 211 flow [2023-08-26 16:44:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 16:44:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 16:44:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2023-08-26 16:44:48,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38427947598253276 [2023-08-26 16:44:48,584 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2023-08-26 16:44:48,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2023-08-26 16:44:48,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:48,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2023-08-26 16:44:48,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,587 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,587 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 106 flow. Second operand 4 states and 352 transitions. [2023-08-26 16:44:48,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 211 flow [2023-08-26 16:44:48,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:44:48,589 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 123 flow [2023-08-26 16:44:48,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-26 16:44:48,590 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-08-26 16:44:48,590 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 123 flow [2023-08-26 16:44:48,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:48,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:48,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:48,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 16:44:48,796 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 16:44:48,796 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:48,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1850126546, now seen corresponding path program 1 times [2023-08-26 16:44:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:48,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912670570] [2023-08-26 16:44:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:48,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:48,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912670570] [2023-08-26 16:44:48,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912670570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:44:48,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216922832] [2023-08-26 16:44:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:48,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:44:48,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:44:48,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:44:48,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 16:44:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:48,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 16:44:48,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:44:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:49,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:44:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:49,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216922832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:44:49,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:44:49,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 16:44:49,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527428458] [2023-08-26 16:44:49,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:44:49,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:44:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:49,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:44:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:44:49,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-26 16:44:49,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 84.71428571428571) internal successors, (593), 7 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:49,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-26 16:44:49,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:49,407 INFO L124 PetriNetUnfolderBase]: 67/137 cut-off events. [2023-08-26 16:44:49,407 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2023-08-26 16:44:49,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 137 events. 67/137 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 400 event pairs, 2 based on Foata normal form. 20/157 useless extension candidates. Maximal degree in co-relation 514. Up to 65 conditions per place. [2023-08-26 16:44:49,409 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 35 selfloop transitions, 10 changer transitions 4/49 dead transitions. [2023-08-26 16:44:49,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 49 transitions, 352 flow [2023-08-26 16:44:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:44:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:44:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 532 transitions. [2023-08-26 16:44:49,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38719068413391555 [2023-08-26 16:44:49,411 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 532 transitions. [2023-08-26 16:44:49,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 532 transitions. [2023-08-26 16:44:49,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:49,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 532 transitions. [2023-08-26 16:44:49,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,415 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,416 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 123 flow. Second operand 6 states and 532 transitions. [2023-08-26 16:44:49,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 49 transitions, 352 flow [2023-08-26 16:44:49,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 321 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 16:44:49,419 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 186 flow [2023-08-26 16:44:49,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-26 16:44:49,419 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2023-08-26 16:44:49,420 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 186 flow [2023-08-26 16:44:49,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.71428571428571) internal successors, (593), 7 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:49,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:49,430 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 16:44:49,620 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 16:44:49,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:49,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1899834078, now seen corresponding path program 2 times [2023-08-26 16:44:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:49,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321960519] [2023-08-26 16:44:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:49,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:49,724 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 16:44:49,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:49,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321960519] [2023-08-26 16:44:49,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321960519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:49,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:49,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 16:44:49,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281189507] [2023-08-26 16:44:49,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:49,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:44:49,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:49,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:44:49,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:44:49,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 229 [2023-08-26 16:44:49,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:49,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 229 [2023-08-26 16:44:49,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:49,806 INFO L124 PetriNetUnfolderBase]: 69/141 cut-off events. [2023-08-26 16:44:49,806 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2023-08-26 16:44:49,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 141 events. 69/141 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 404 event pairs, 9 based on Foata normal form. 2/143 useless extension candidates. Maximal degree in co-relation 594. Up to 62 conditions per place. [2023-08-26 16:44:49,808 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 35 selfloop transitions, 8 changer transitions 2/45 dead transitions. [2023-08-26 16:44:49,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 381 flow [2023-08-26 16:44:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:44:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:44:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 462 transitions. [2023-08-26 16:44:49,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034934497816594 [2023-08-26 16:44:49,810 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 462 transitions. [2023-08-26 16:44:49,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 462 transitions. [2023-08-26 16:44:49,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:49,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 462 transitions. [2023-08-26 16:44:49,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,813 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,814 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 186 flow. Second operand 5 states and 462 transitions. [2023-08-26 16:44:49,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 381 flow [2023-08-26 16:44:49,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 360 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-26 16:44:49,817 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 221 flow [2023-08-26 16:44:49,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2023-08-26 16:44:49,818 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-26 16:44:49,818 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 221 flow [2023-08-26 16:44:49,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:49,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:49,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:49,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 16:44:49,819 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:49,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1304540752, now seen corresponding path program 1 times [2023-08-26 16:44:49,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:49,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129269643] [2023-08-26 16:44:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:49,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:50,073 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 16:44:50,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:50,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129269643] [2023-08-26 16:44:50,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129269643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:44:50,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935821963] [2023-08-26 16:44:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:50,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:44:50,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:44:50,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:44:50,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 16:44:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:50,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 16:44:50,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:44:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:44:50,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:44:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:44:50,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935821963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:44:50,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:44:50,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2023-08-26 16:44:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988322857] [2023-08-26 16:44:50,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:44:50,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:44:50,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:50,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:44:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:44:50,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-26 16:44:50,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 221 flow. Second operand has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:50,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:50,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-26 16:44:50,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:50,849 INFO L124 PetriNetUnfolderBase]: 151/294 cut-off events. [2023-08-26 16:44:50,850 INFO L125 PetriNetUnfolderBase]: For 911/911 co-relation queries the response was YES. [2023-08-26 16:44:50,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 294 events. 151/294 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1095 event pairs, 8 based on Foata normal form. 24/318 useless extension candidates. Maximal degree in co-relation 1345. Up to 121 conditions per place. [2023-08-26 16:44:50,853 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 69 selfloop transitions, 25 changer transitions 0/94 dead transitions. [2023-08-26 16:44:50,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 94 transitions, 818 flow [2023-08-26 16:44:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:44:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:44:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1206 transitions. [2023-08-26 16:44:50,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37616968184653776 [2023-08-26 16:44:50,857 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1206 transitions. [2023-08-26 16:44:50,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1206 transitions. [2023-08-26 16:44:50,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:50,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1206 transitions. [2023-08-26 16:44:50,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:50,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:50,869 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:50,869 INFO L175 Difference]: Start difference. First operand has 42 places, 29 transitions, 221 flow. Second operand 14 states and 1206 transitions. [2023-08-26 16:44:50,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 94 transitions, 818 flow [2023-08-26 16:44:50,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 814 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-26 16:44:50,874 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 504 flow [2023-08-26 16:44:50,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=504, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-08-26 16:44:50,875 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-08-26 16:44:50,875 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 504 flow [2023-08-26 16:44:50,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:50,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:50,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:50,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 16:44:51,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:44:51,082 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:51,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:51,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1051645930, now seen corresponding path program 2 times [2023-08-26 16:44:51,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:51,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708848772] [2023-08-26 16:44:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:44:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:51,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708848772] [2023-08-26 16:44:51,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708848772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:44:51,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018586062] [2023-08-26 16:44:51,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:44:51,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:44:51,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:44:51,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:44:51,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 16:44:52,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:44:52,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:44:52,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:44:52,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:44:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:52,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:44:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:53,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018586062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:44:53,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:44:53,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-26 16:44:53,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579570230] [2023-08-26 16:44:53,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:44:53,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 16:44:53,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 16:44:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-26 16:44:53,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:44:53,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 504 flow. Second operand has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:53,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:53,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:44:53,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:54,627 INFO L124 PetriNetUnfolderBase]: 298/596 cut-off events. [2023-08-26 16:44:54,627 INFO L125 PetriNetUnfolderBase]: For 3335/3335 co-relation queries the response was YES. [2023-08-26 16:44:54,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 596 events. 298/596 cut-off events. For 3335/3335 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2927 event pairs, 4 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 3124. Up to 233 conditions per place. [2023-08-26 16:44:54,633 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 82 selfloop transitions, 79 changer transitions 6/167 dead transitions. [2023-08-26 16:44:54,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 167 transitions, 1744 flow [2023-08-26 16:44:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:44:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:44:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1461 transitions. [2023-08-26 16:44:54,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33578487703976095 [2023-08-26 16:44:54,639 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1461 transitions. [2023-08-26 16:44:54,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1461 transitions. [2023-08-26 16:44:54,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:54,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1461 transitions. [2023-08-26 16:44:54,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:54,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 229.0) internal successors, (4580), 20 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:54,649 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 229.0) internal successors, (4580), 20 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:54,649 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 504 flow. Second operand 19 states and 1461 transitions. [2023-08-26 16:44:54,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 167 transitions, 1744 flow [2023-08-26 16:44:54,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 167 transitions, 1549 flow, removed 79 selfloop flow, removed 4 redundant places. [2023-08-26 16:44:54,664 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 1225 flow [2023-08-26 16:44:54,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1225, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2023-08-26 16:44:54,666 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 55 predicate places. [2023-08-26 16:44:54,666 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 1225 flow [2023-08-26 16:44:54,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:54,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:54,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:54,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 16:44:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:44:54,872 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:54,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash -144679002, now seen corresponding path program 3 times [2023-08-26 16:44:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:54,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276612184] [2023-08-26 16:44:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:44:55,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:55,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276612184] [2023-08-26 16:44:55,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276612184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:44:55,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569960606] [2023-08-26 16:44:55,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:44:55,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:44:55,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:44:55,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:44:55,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 16:44:55,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 16:44:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:44:55,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:44:55,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:44:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:56,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:44:57,217 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 16:44:57,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569960606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:44:57,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:44:57,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2023-08-26 16:44:57,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477476624] [2023-08-26 16:44:57,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:44:57,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 16:44:57,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 16:44:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-08-26 16:44:57,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:44:57,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 1225 flow. Second operand has 13 states, 13 states have (on average 73.6923076923077) internal successors, (958), 13 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:57,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:57,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:44:57,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:58,853 INFO L124 PetriNetUnfolderBase]: 404/818 cut-off events. [2023-08-26 16:44:58,853 INFO L125 PetriNetUnfolderBase]: For 6421/6421 co-relation queries the response was YES. [2023-08-26 16:44:58,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 818 events. 404/818 cut-off events. For 6421/6421 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4296 event pairs, 26 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 4759. Up to 307 conditions per place. [2023-08-26 16:44:58,862 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 94 selfloop transitions, 106 changer transitions 4/204 dead transitions. [2023-08-26 16:44:58,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 204 transitions, 2590 flow [2023-08-26 16:44:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 16:44:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 16:44:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1369 transitions. [2023-08-26 16:44:58,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3321203299369238 [2023-08-26 16:44:58,868 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1369 transitions. [2023-08-26 16:44:58,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1369 transitions. [2023-08-26 16:44:58,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:58,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1369 transitions. [2023-08-26 16:44:58,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 76.05555555555556) internal successors, (1369), 18 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:58,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:58,876 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:58,876 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 1225 flow. Second operand 18 states and 1369 transitions. [2023-08-26 16:44:58,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 204 transitions, 2590 flow [2023-08-26 16:44:58,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 204 transitions, 2331 flow, removed 125 selfloop flow, removed 3 redundant places. [2023-08-26 16:44:58,933 INFO L231 Difference]: Finished difference. Result has 101 places, 162 transitions, 2131 flow [2023-08-26 16:44:58,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2131, PETRI_PLACES=101, PETRI_TRANSITIONS=162} [2023-08-26 16:44:58,933 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 75 predicate places. [2023-08-26 16:44:58,934 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 162 transitions, 2131 flow [2023-08-26 16:44:58,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.6923076923077) internal successors, (958), 13 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:58,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:58,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:44:58,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-26 16:44:59,139 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,SelfDestructingSolverStorable12 [2023-08-26 16:44:59,139 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:44:59,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1909482580, now seen corresponding path program 4 times [2023-08-26 16:44:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:59,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610415783] [2023-08-26 16:44:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:59,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:44:59,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610415783] [2023-08-26 16:44:59,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610415783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:44:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519354428] [2023-08-26 16:44:59,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:44:59,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:44:59,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:44:59,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:44:59,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 16:44:59,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:44:59,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:44:59,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:44:59,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:45:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:45:00,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:45:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:45:01,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519354428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:45:01,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:45:01,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-08-26 16:45:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283243360] [2023-08-26 16:45:01,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:45:01,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 16:45:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:45:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 16:45:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-26 16:45:01,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:45:01,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 162 transitions, 2131 flow. Second operand has 14 states, 14 states have (on average 73.35714285714286) internal successors, (1027), 14 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:01,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:45:01,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:45:01,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:45:03,275 INFO L124 PetriNetUnfolderBase]: 516/1053 cut-off events. [2023-08-26 16:45:03,275 INFO L125 PetriNetUnfolderBase]: For 7450/7450 co-relation queries the response was YES. [2023-08-26 16:45:03,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 1053 events. 516/1053 cut-off events. For 7450/7450 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6059 event pairs, 12 based on Foata normal form. 5/1058 useless extension candidates. Maximal degree in co-relation 6325. Up to 317 conditions per place. [2023-08-26 16:45:03,285 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 66 selfloop transitions, 188 changer transitions 10/264 dead transitions. [2023-08-26 16:45:03,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 264 transitions, 3717 flow [2023-08-26 16:45:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 16:45:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 16:45:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1374 transitions. [2023-08-26 16:45:03,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-26 16:45:03,290 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1374 transitions. [2023-08-26 16:45:03,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1374 transitions. [2023-08-26 16:45:03,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:45:03,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1374 transitions. [2023-08-26 16:45:03,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 76.33333333333333) internal successors, (1374), 18 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:03,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:03,299 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:03,299 INFO L175 Difference]: Start difference. First operand has 101 places, 162 transitions, 2131 flow. Second operand 18 states and 1374 transitions. [2023-08-26 16:45:03,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 264 transitions, 3717 flow [2023-08-26 16:45:03,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 264 transitions, 3186 flow, removed 258 selfloop flow, removed 3 redundant places. [2023-08-26 16:45:03,384 INFO L231 Difference]: Finished difference. Result has 118 places, 207 transitions, 2849 flow [2023-08-26 16:45:03,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2849, PETRI_PLACES=118, PETRI_TRANSITIONS=207} [2023-08-26 16:45:03,385 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 92 predicate places. [2023-08-26 16:45:03,385 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 207 transitions, 2849 flow [2023-08-26 16:45:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.35714285714286) internal successors, (1027), 14 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:03,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:45:03,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:45:03,394 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 16:45:03,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:45:03,591 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:45:03,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:45:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1759706257, now seen corresponding path program 5 times [2023-08-26 16:45:03,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:45:03,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333363440] [2023-08-26 16:45:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:45:03,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:45:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:45:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:45:03,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:45:03,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333363440] [2023-08-26 16:45:03,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333363440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:45:03,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888060735] [2023-08-26 16:45:03,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:45:03,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:45:03,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:45:03,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:45:03,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 16:45:03,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 16:45:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:45:03,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 16:45:03,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:45:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:45:04,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:45:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:45:04,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888060735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:45:04,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:45:04,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-08-26 16:45:04,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234872099] [2023-08-26 16:45:04,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:45:04,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 16:45:04,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:45:04,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 16:45:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-26 16:45:04,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 229 [2023-08-26 16:45:04,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 207 transitions, 2849 flow. Second operand has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:04,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:45:04,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 229 [2023-08-26 16:45:04,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:45:06,561 INFO L124 PetriNetUnfolderBase]: 1275/2524 cut-off events. [2023-08-26 16:45:06,561 INFO L125 PetriNetUnfolderBase]: For 14551/14551 co-relation queries the response was YES. [2023-08-26 16:45:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15405 conditions, 2524 events. 1275/2524 cut-off events. For 14551/14551 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16207 event pairs, 6 based on Foata normal form. 204/2728 useless extension candidates. Maximal degree in co-relation 15370. Up to 679 conditions per place. [2023-08-26 16:45:06,586 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 350 selfloop transitions, 203 changer transitions 0/553 dead transitions. [2023-08-26 16:45:06,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 553 transitions, 8582 flow [2023-08-26 16:45:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:45:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:45:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1211 transitions. [2023-08-26 16:45:06,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3777292576419214 [2023-08-26 16:45:06,589 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1211 transitions. [2023-08-26 16:45:06,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1211 transitions. [2023-08-26 16:45:06,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:45:06,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1211 transitions. [2023-08-26 16:45:06,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.5) internal successors, (1211), 14 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:06,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:06,596 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:06,596 INFO L175 Difference]: Start difference. First operand has 118 places, 207 transitions, 2849 flow. Second operand 14 states and 1211 transitions. [2023-08-26 16:45:06,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 553 transitions, 8582 flow [2023-08-26 16:45:06,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 553 transitions, 7600 flow, removed 394 selfloop flow, removed 9 redundant places. [2023-08-26 16:45:06,772 INFO L231 Difference]: Finished difference. Result has 122 places, 344 transitions, 4706 flow [2023-08-26 16:45:06,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4706, PETRI_PLACES=122, PETRI_TRANSITIONS=344} [2023-08-26 16:45:06,773 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 96 predicate places. [2023-08-26 16:45:06,773 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 344 transitions, 4706 flow [2023-08-26 16:45:06,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:06,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:45:06,773 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:45:06,779 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 16:45:06,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:45:06,979 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:45:06,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:45:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1938979984, now seen corresponding path program 6 times [2023-08-26 16:45:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:45:06,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110008620] [2023-08-26 16:45:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:45:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:45:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:45:07,257 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 16:45:07,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:45:07,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110008620] [2023-08-26 16:45:07,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110008620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:45:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367316819] [2023-08-26 16:45:07,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:45:07,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:45:07,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:45:07,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:45:07,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 16:45:07,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 16:45:07,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:45:07,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 16:45:07,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:45:08,025 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 16:45:08,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:45:11,710 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 16:45:11,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367316819] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:45:11,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:45:11,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 20 [2023-08-26 16:45:11,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479089217] [2023-08-26 16:45:11,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:45:11,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 16:45:11,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:45:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 16:45:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=299, Unknown=1, NotChecked=0, Total=420 [2023-08-26 16:45:11,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:45:11,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 344 transitions, 4706 flow. Second operand has 21 states, 21 states have (on average 72.85714285714286) internal successors, (1530), 21 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:11,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:45:11,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:45:11,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:45:13,789 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 16:45:20,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:45:22,117 WARN L539 Checker$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 16:45:26,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:45:29,430 WARN L539 Checker$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 16:45:32,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:45:35,063 WARN L539 Checker$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 16:45:40,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:45:42,482 WARN L539 Checker$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 16:45:43,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:45:44,651 INFO L124 PetriNetUnfolderBase]: 1990/3717 cut-off events. [2023-08-26 16:45:44,651 INFO L125 PetriNetUnfolderBase]: For 20026/20026 co-relation queries the response was YES. [2023-08-26 16:45:44,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22480 conditions, 3717 events. 1990/3717 cut-off events. For 20026/20026 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24615 event pairs, 104 based on Foata normal form. 126/3843 useless extension candidates. Maximal degree in co-relation 22449. Up to 909 conditions per place. [2023-08-26 16:45:44,748 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 268 selfloop transitions, 494 changer transitions 12/774 dead transitions. [2023-08-26 16:45:44,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 774 transitions, 11191 flow [2023-08-26 16:45:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-26 16:45:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-26 16:45:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2944 transitions. [2023-08-26 16:45:44,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296383383719628 [2023-08-26 16:45:44,756 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2944 transitions. [2023-08-26 16:45:44,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2944 transitions. [2023-08-26 16:45:44,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:45:44,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2944 transitions. [2023-08-26 16:45:44,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 75.48717948717949) internal successors, (2944), 39 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:44,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 229.0) internal successors, (9160), 40 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:44,771 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 229.0) internal successors, (9160), 40 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:44,771 INFO L175 Difference]: Start difference. First operand has 122 places, 344 transitions, 4706 flow. Second operand 39 states and 2944 transitions. [2023-08-26 16:45:44,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 774 transitions, 11191 flow [2023-08-26 16:45:45,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 774 transitions, 10416 flow, removed 334 selfloop flow, removed 6 redundant places. [2023-08-26 16:45:45,035 INFO L231 Difference]: Finished difference. Result has 167 places, 681 transitions, 10050 flow [2023-08-26 16:45:45,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10050, PETRI_PLACES=167, PETRI_TRANSITIONS=681} [2023-08-26 16:45:45,035 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 141 predicate places. [2023-08-26 16:45:45,036 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 681 transitions, 10050 flow [2023-08-26 16:45:45,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.85714285714286) internal successors, (1530), 21 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:45,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:45:45,037 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:45:45,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 16:45:45,244 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,SelfDestructingSolverStorable15 [2023-08-26 16:45:45,245 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:45:45,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:45:45,245 INFO L85 PathProgramCache]: Analyzing trace with hash 416663472, now seen corresponding path program 7 times [2023-08-26 16:45:45,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:45:45,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255304489] [2023-08-26 16:45:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:45:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:45:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:45:45,551 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 16:45:45,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:45:45,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255304489] [2023-08-26 16:45:45,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255304489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:45:45,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089596217] [2023-08-26 16:45:45,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:45:45,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:45:45,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:45:45,553 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:45:45,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 16:45:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:45:45,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:45:45,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:45:46,442 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 16:45:46,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:45:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:45:47,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089596217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:45:47,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:45:47,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 16:45:47,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253499317] [2023-08-26 16:45:47,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:45:47,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:45:47,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:45:47,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:45:47,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:45:47,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:45:47,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 681 transitions, 10050 flow. Second operand has 19 states, 19 states have (on average 72.94736842105263) internal successors, (1386), 19 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:47,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:45:47,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:45:47,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:45:53,159 INFO L124 PetriNetUnfolderBase]: 3012/5426 cut-off events. [2023-08-26 16:45:53,160 INFO L125 PetriNetUnfolderBase]: For 29923/29923 co-relation queries the response was YES. [2023-08-26 16:45:53,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35186 conditions, 5426 events. 3012/5426 cut-off events. For 29923/29923 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35855 event pairs, 132 based on Foata normal form. 84/5510 useless extension candidates. Maximal degree in co-relation 35145. Up to 1357 conditions per place. [2023-08-26 16:45:53,203 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 546 selfloop transitions, 607 changer transitions 32/1185 dead transitions. [2023-08-26 16:45:53,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1185 transitions, 18644 flow [2023-08-26 16:45:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 16:45:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 16:45:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2519 transitions. [2023-08-26 16:45:53,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-26 16:45:53,208 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2519 transitions. [2023-08-26 16:45:53,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2519 transitions. [2023-08-26 16:45:53,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:45:53,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2519 transitions. [2023-08-26 16:45:53,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 76.33333333333333) internal successors, (2519), 33 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:53,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 229.0) internal successors, (7786), 34 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:53,220 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 229.0) internal successors, (7786), 34 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:53,220 INFO L175 Difference]: Start difference. First operand has 167 places, 681 transitions, 10050 flow. Second operand 33 states and 2519 transitions. [2023-08-26 16:45:53,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1185 transitions, 18644 flow [2023-08-26 16:45:54,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1185 transitions, 18004 flow, removed 227 selfloop flow, removed 6 redundant places. [2023-08-26 16:45:54,026 INFO L231 Difference]: Finished difference. Result has 209 places, 1015 transitions, 16615 flow [2023-08-26 16:45:54,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=9479, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16615, PETRI_PLACES=209, PETRI_TRANSITIONS=1015} [2023-08-26 16:45:54,026 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 183 predicate places. [2023-08-26 16:45:54,027 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 1015 transitions, 16615 flow [2023-08-26 16:45:54,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 72.94736842105263) internal successors, (1386), 19 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:54,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:45:54,027 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:45:54,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-26 16:45:54,232 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,SelfDestructingSolverStorable16 [2023-08-26 16:45:54,232 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:45:54,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:45:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1308815986, now seen corresponding path program 8 times [2023-08-26 16:45:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:45:54,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139288965] [2023-08-26 16:45:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:45:54,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:45:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:45:54,480 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 16:45:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:45:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139288965] [2023-08-26 16:45:54,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139288965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:45:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139208331] [2023-08-26 16:45:54,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:45:54,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:45:54,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:45:54,482 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:45:54,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 16:45:54,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:45:54,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:45:54,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:45:54,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:45:55,517 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 16:45:55,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:45:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:45:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139208331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:45:56,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:45:56,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 16:45:56,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011554086] [2023-08-26 16:45:56,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:45:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:45:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:45:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:45:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:45:56,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:45:56,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 1015 transitions, 16615 flow. Second operand has 19 states, 19 states have (on average 72.94736842105263) internal successors, (1386), 19 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:56,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:45:56,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:45:56,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:46:01,375 INFO L124 PetriNetUnfolderBase]: 3484/6147 cut-off events. [2023-08-26 16:46:01,375 INFO L125 PetriNetUnfolderBase]: For 42765/42765 co-relation queries the response was YES. [2023-08-26 16:46:01,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44345 conditions, 6147 events. 3484/6147 cut-off events. For 42765/42765 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40684 event pairs, 18 based on Foata normal form. 70/6217 useless extension candidates. Maximal degree in co-relation 44291. Up to 2362 conditions per place. [2023-08-26 16:46:01,433 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 626 selfloop transitions, 708 changer transitions 0/1334 dead transitions. [2023-08-26 16:46:01,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1334 transitions, 23680 flow [2023-08-26 16:46:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 16:46:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 16:46:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1841 transitions. [2023-08-26 16:46:01,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33497088791848617 [2023-08-26 16:46:01,437 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1841 transitions. [2023-08-26 16:46:01,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1841 transitions. [2023-08-26 16:46:01,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:46:01,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1841 transitions. [2023-08-26 16:46:01,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 76.70833333333333) internal successors, (1841), 24 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 16:46:01,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 229.0) internal successors, (5725), 25 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:01,445 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 229.0) internal successors, (5725), 25 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:01,446 INFO L175 Difference]: Start difference. First operand has 209 places, 1015 transitions, 16615 flow. Second operand 24 states and 1841 transitions. [2023-08-26 16:46:01,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1334 transitions, 23680 flow [2023-08-26 16:46:02,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 1334 transitions, 22879 flow, removed 367 selfloop flow, removed 7 redundant places. [2023-08-26 16:46:02,931 INFO L231 Difference]: Finished difference. Result has 236 places, 1241 transitions, 22251 flow [2023-08-26 16:46:02,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=15866, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=22251, PETRI_PLACES=236, PETRI_TRANSITIONS=1241} [2023-08-26 16:46:02,932 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 210 predicate places. [2023-08-26 16:46:02,932 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 1241 transitions, 22251 flow [2023-08-26 16:46:02,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 72.94736842105263) internal successors, (1386), 19 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:02,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:46:02,932 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:46:02,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 16:46:03,133 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,SelfDestructingSolverStorable17 [2023-08-26 16:46:03,133 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:46:03,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:46:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2136417010, now seen corresponding path program 9 times [2023-08-26 16:46:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:46:03,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692992838] [2023-08-26 16:46:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:46:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:46:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:46:03,337 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 16:46:03,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:46:03,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692992838] [2023-08-26 16:46:03,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692992838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:46:03,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857384751] [2023-08-26 16:46:03,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:46:03,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:46:03,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:46:03,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:46:03,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 16:46:03,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-26 16:46:03,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:46:03,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 16:46:03,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:46:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:46:03,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:46:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:46:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857384751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:46:04,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:46:04,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-26 16:46:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436174501] [2023-08-26 16:46:04,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:46:04,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 16:46:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:46:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 16:46:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-26 16:46:04,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 229 [2023-08-26 16:46:04,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1241 transitions, 22251 flow. Second operand has 17 states, 17 states have (on average 78.29411764705883) internal successors, (1331), 17 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:04,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:46:04,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 229 [2023-08-26 16:46:04,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:46:15,985 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 16:46:46,930 INFO L124 PetriNetUnfolderBase]: 5993/10481 cut-off events. [2023-08-26 16:46:46,931 INFO L125 PetriNetUnfolderBase]: For 123953/123953 co-relation queries the response was YES. [2023-08-26 16:46:46,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83568 conditions, 10481 events. 5993/10481 cut-off events. For 123953/123953 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 74086 event pairs, 120 based on Foata normal form. 954/11435 useless extension candidates. Maximal degree in co-relation 83503. Up to 2953 conditions per place. [2023-08-26 16:46:47,041 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 1267 selfloop transitions, 1244 changer transitions 18/2529 dead transitions. [2023-08-26 16:46:47,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 2529 transitions, 47239 flow [2023-08-26 16:46:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-26 16:46:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-26 16:46:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5729 transitions. [2023-08-26 16:46:47,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523586936465957 [2023-08-26 16:46:47,049 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5729 transitions. [2023-08-26 16:46:47,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5729 transitions. [2023-08-26 16:46:47,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:46:47,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5729 transitions. [2023-08-26 16:46:47,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 80.69014084507042) internal successors, (5729), 71 states have internal predecessors, (5729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:47,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 229.0) internal successors, (16488), 72 states have internal predecessors, (16488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:47,076 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 229.0) internal successors, (16488), 72 states have internal predecessors, (16488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:47,076 INFO L175 Difference]: Start difference. First operand has 236 places, 1241 transitions, 22251 flow. Second operand 71 states and 5729 transitions. [2023-08-26 16:46:47,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 2529 transitions, 47239 flow [2023-08-26 16:46:51,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 2529 transitions, 46679 flow, removed 230 selfloop flow, removed 8 redundant places. [2023-08-26 16:46:51,694 INFO L231 Difference]: Finished difference. Result has 339 places, 2064 transitions, 41531 flow [2023-08-26 16:46:51,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=21171, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=41531, PETRI_PLACES=339, PETRI_TRANSITIONS=2064} [2023-08-26 16:46:51,695 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 313 predicate places. [2023-08-26 16:46:51,695 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 2064 transitions, 41531 flow [2023-08-26 16:46:51,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.29411764705883) internal successors, (1331), 17 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:51,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:46:51,696 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:46:51,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-26 16:46:51,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:46:51,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:46:51,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:46:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1549043616, now seen corresponding path program 10 times [2023-08-26 16:46:51,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:46:51,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112761578] [2023-08-26 16:46:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:46:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:46:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:46:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:46:52,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:46:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112761578] [2023-08-26 16:46:52,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112761578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:46:52,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550211729] [2023-08-26 16:46:52,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:46:52,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:46:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:46:52,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:46:52,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 16:46:52,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:46:52,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:46:52,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:46:52,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:46:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:46:52,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:46:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:46:53,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550211729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:46:53,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:46:53,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 16:46:53,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325530756] [2023-08-26 16:46:53,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:46:53,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:46:53,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:46:53,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:46:53,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:46:53,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:46:53,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 2064 transitions, 41531 flow. Second operand has 19 states, 19 states have (on average 73.42105263157895) internal successors, (1395), 19 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:53,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:46:53,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:46:53,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:46:55,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:47:09,620 INFO L124 PetriNetUnfolderBase]: 8589/15329 cut-off events. [2023-08-26 16:47:09,620 INFO L125 PetriNetUnfolderBase]: For 223031/223031 co-relation queries the response was YES. [2023-08-26 16:47:09,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137037 conditions, 15329 events. 8589/15329 cut-off events. For 223031/223031 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 117433 event pairs, 56 based on Foata normal form. 646/15975 useless extension candidates. Maximal degree in co-relation 136929. Up to 5183 conditions per place. [2023-08-26 16:47:09,796 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 1337 selfloop transitions, 1875 changer transitions 1/3213 dead transitions. [2023-08-26 16:47:09,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 3213 transitions, 69225 flow [2023-08-26 16:47:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 16:47:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 16:47:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3161 transitions. [2023-08-26 16:47:09,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3366705719458941 [2023-08-26 16:47:09,801 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3161 transitions. [2023-08-26 16:47:09,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3161 transitions. [2023-08-26 16:47:09,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:47:09,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3161 transitions. [2023-08-26 16:47:09,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 77.09756097560975) internal successors, (3161), 41 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:09,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 229.0) internal successors, (9618), 42 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:09,812 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 229.0) internal successors, (9618), 42 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:09,812 INFO L175 Difference]: Start difference. First operand has 339 places, 2064 transitions, 41531 flow. Second operand 41 states and 3161 transitions. [2023-08-26 16:47:09,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 3213 transitions, 69225 flow [2023-08-26 16:47:21,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 3213 transitions, 65985 flow, removed 1399 selfloop flow, removed 12 redundant places. [2023-08-26 16:47:21,321 INFO L231 Difference]: Finished difference. Result has 380 places, 3008 transitions, 64214 flow [2023-08-26 16:47:21,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=38291, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=64214, PETRI_PLACES=380, PETRI_TRANSITIONS=3008} [2023-08-26 16:47:21,323 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 354 predicate places. [2023-08-26 16:47:21,323 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 3008 transitions, 64214 flow [2023-08-26 16:47:21,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 73.42105263157895) internal successors, (1395), 19 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:21,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:47:21,324 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:47:21,332 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 16:47:21,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:47:21,529 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:47:21,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:47:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1264534992, now seen corresponding path program 11 times [2023-08-26 16:47:21,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:47:21,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652135592] [2023-08-26 16:47:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:47:21,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:47:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:47:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-26 16:47:22,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:47:22,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652135592] [2023-08-26 16:47:22,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652135592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:47:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537037231] [2023-08-26 16:47:22,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:47:22,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:47:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:47:22,182 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:47:22,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 16:47:22,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 16:47:22,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:47:22,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:47:22,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:47:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:47:22,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:47:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:47:24,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537037231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:47:24,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:47:24,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2023-08-26 16:47:24,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376641051] [2023-08-26 16:47:24,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:47:24,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:47:24,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:47:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:47:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:47:24,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 229 [2023-08-26 16:47:24,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 3008 transitions, 64214 flow. Second operand has 18 states, 18 states have (on average 82.33333333333333) internal successors, (1482), 18 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:24,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:47:24,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 229 [2023-08-26 16:47:24,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:47:34,610 INFO L124 PetriNetUnfolderBase]: 7242/12797 cut-off events. [2023-08-26 16:47:34,610 INFO L125 PetriNetUnfolderBase]: For 207967/207967 co-relation queries the response was YES. [2023-08-26 16:47:34,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117122 conditions, 12797 events. 7242/12797 cut-off events. For 207967/207967 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 94964 event pairs, 420 based on Foata normal form. 948/13745 useless extension candidates. Maximal degree in co-relation 117005. Up to 3986 conditions per place. [2023-08-26 16:47:34,765 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 1476 selfloop transitions, 940 changer transitions 439/2855 dead transitions. [2023-08-26 16:47:34,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2855 transitions, 64063 flow [2023-08-26 16:47:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:47:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:47:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1204 transitions. [2023-08-26 16:47:34,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37554585152838427 [2023-08-26 16:47:34,768 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1204 transitions. [2023-08-26 16:47:34,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1204 transitions. [2023-08-26 16:47:34,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:47:34,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1204 transitions. [2023-08-26 16:47:34,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.0) internal successors, (1204), 14 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:34,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:34,772 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:34,772 INFO L175 Difference]: Start difference. First operand has 380 places, 3008 transitions, 64214 flow. Second operand 14 states and 1204 transitions. [2023-08-26 16:47:34,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2855 transitions, 64063 flow [2023-08-26 16:47:44,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 2855 transitions, 59621 flow, removed 1438 selfloop flow, removed 11 redundant places. [2023-08-26 16:47:44,279 INFO L231 Difference]: Finished difference. Result has 379 places, 2185 transitions, 41370 flow [2023-08-26 16:47:44,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=46755, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=41370, PETRI_PLACES=379, PETRI_TRANSITIONS=2185} [2023-08-26 16:47:44,282 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 353 predicate places. [2023-08-26 16:47:44,282 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 2185 transitions, 41370 flow [2023-08-26 16:47:44,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.33333333333333) internal successors, (1482), 18 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:44,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:47:44,283 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:47:44,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 16:47:44,487 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,SelfDestructingSolverStorable20 [2023-08-26 16:47:44,487 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:47:44,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:47:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1563237795, now seen corresponding path program 12 times [2023-08-26 16:47:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:47:44,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51249863] [2023-08-26 16:47:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:47:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:47:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:47:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-26 16:47:44,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:47:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51249863] [2023-08-26 16:47:44,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51249863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:47:44,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170680176] [2023-08-26 16:47:44,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:47:44,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:47:44,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:47:44,789 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:47:44,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 16:47:44,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 16:47:44,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:47:44,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:47:44,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:47:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-26 16:47:45,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:47:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-26 16:47:46,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170680176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:47:46,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:47:46,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 16:47:46,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346534854] [2023-08-26 16:47:46,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:47:46,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:47:46,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:47:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:47:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:47:46,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:47:46,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 2185 transitions, 41370 flow. Second operand has 19 states, 19 states have (on average 73.3157894736842) internal successors, (1393), 19 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:46,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:47:46,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:47:46,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:47:58,351 INFO L124 PetriNetUnfolderBase]: 6644/11773 cut-off events. [2023-08-26 16:47:58,351 INFO L125 PetriNetUnfolderBase]: For 142619/142619 co-relation queries the response was YES. [2023-08-26 16:47:58,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100509 conditions, 11773 events. 6644/11773 cut-off events. For 142619/142619 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 85901 event pairs, 316 based on Foata normal form. 192/11965 useless extension candidates. Maximal degree in co-relation 100397. Up to 4873 conditions per place. [2023-08-26 16:47:58,500 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 1815 selfloop transitions, 680 changer transitions 128/2623 dead transitions. [2023-08-26 16:47:58,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2623 transitions, 52814 flow [2023-08-26 16:47:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-26 16:47:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-26 16:47:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3996 transitions. [2023-08-26 16:47:58,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32924116338469145 [2023-08-26 16:47:58,506 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3996 transitions. [2023-08-26 16:47:58,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3996 transitions. [2023-08-26 16:47:58,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:47:58,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3996 transitions. [2023-08-26 16:47:58,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 75.39622641509433) internal successors, (3996), 53 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:58,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 229.0) internal successors, (12366), 54 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:58,521 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 229.0) internal successors, (12366), 54 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:58,521 INFO L175 Difference]: Start difference. First operand has 379 places, 2185 transitions, 41370 flow. Second operand 53 states and 3996 transitions. [2023-08-26 16:47:58,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2623 transitions, 52814 flow [2023-08-26 16:48:04,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 2623 transitions, 49644 flow, removed 277 selfloop flow, removed 24 redundant places. [2023-08-26 16:48:04,824 INFO L231 Difference]: Finished difference. Result has 411 places, 2252 transitions, 41853 flow [2023-08-26 16:48:04,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=38235, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=41853, PETRI_PLACES=411, PETRI_TRANSITIONS=2252} [2023-08-26 16:48:04,827 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 385 predicate places. [2023-08-26 16:48:04,827 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 2252 transitions, 41853 flow [2023-08-26 16:48:04,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 73.3157894736842) internal successors, (1393), 19 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:48:04,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:48:04,827 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:48:04,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 16:48:05,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:48:05,033 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:48:05,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:48:05,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1346089167, now seen corresponding path program 13 times [2023-08-26 16:48:05,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:48:05,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869413805] [2023-08-26 16:48:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:48:05,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:48:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:48:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:48:05,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:48:05,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869413805] [2023-08-26 16:48:05,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869413805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:48:05,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867953880] [2023-08-26 16:48:05,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:48:05,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:48:05,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:48:05,583 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:48:05,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 16:48:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:48:05,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 16:48:05,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:48:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:48:06,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:48:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:48:08,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867953880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:48:08,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:48:08,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-26 16:48:08,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697899252] [2023-08-26 16:48:08,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:48:08,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 16:48:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:48:08,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 16:48:08,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2023-08-26 16:48:08,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 16:48:08,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 2252 transitions, 41853 flow. Second operand has 29 states, 29 states have (on average 72.79310344827586) internal successors, (2111), 29 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:48:08,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:48:08,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 16:48:08,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:48:30,753 INFO L124 PetriNetUnfolderBase]: 9528/16597 cut-off events. [2023-08-26 16:48:30,754 INFO L125 PetriNetUnfolderBase]: For 228233/228233 co-relation queries the response was YES. [2023-08-26 16:48:30,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147130 conditions, 16597 events. 9528/16597 cut-off events. For 228233/228233 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 127588 event pairs, 232 based on Foata normal form. 162/16759 useless extension candidates. Maximal degree in co-relation 147016. Up to 5595 conditions per place. [2023-08-26 16:48:30,996 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 1729 selfloop transitions, 1952 changer transitions 22/3703 dead transitions. [2023-08-26 16:48:30,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 3703 transitions, 77841 flow [2023-08-26 16:48:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-26 16:48:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-26 16:48:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4160 transitions. [2023-08-26 16:48:31,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33028979753870585 [2023-08-26 16:48:31,000 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4160 transitions. [2023-08-26 16:48:31,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4160 transitions. [2023-08-26 16:48:31,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:48:31,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4160 transitions. [2023-08-26 16:48:31,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 75.63636363636364) internal successors, (4160), 55 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:48:31,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 229.0) internal successors, (12824), 56 states have internal predecessors, (12824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:48:31,018 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 229.0) internal successors, (12824), 56 states have internal predecessors, (12824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:48:31,019 INFO L175 Difference]: Start difference. First operand has 411 places, 2252 transitions, 41853 flow. Second operand 55 states and 4160 transitions. [2023-08-26 16:48:31,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 3703 transitions, 77841 flow [2023-08-26 16:48:41,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 3703 transitions, 76151 flow, removed 798 selfloop flow, removed 17 redundant places. [2023-08-26 16:48:41,365 INFO L231 Difference]: Finished difference. Result has 448 places, 3509 transitions, 74711 flow [2023-08-26 16:48:41,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=40807, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=881, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=74711, PETRI_PLACES=448, PETRI_TRANSITIONS=3509} [2023-08-26 16:48:41,367 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 422 predicate places. [2023-08-26 16:48:41,367 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 3509 transitions, 74711 flow [2023-08-26 16:48:41,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 72.79310344827586) internal successors, (2111), 29 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:48:41,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:48:41,368 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:48:41,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-26 16:48:41,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:48:41,574 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:48:41,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:48:41,574 INFO L85 PathProgramCache]: Analyzing trace with hash 369813823, now seen corresponding path program 14 times [2023-08-26 16:48:41,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:48:41,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786888703] [2023-08-26 16:48:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:48:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:48:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:48:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:48:42,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:48:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786888703] [2023-08-26 16:48:42,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786888703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:48:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749184918] [2023-08-26 16:48:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:48:42,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:48:42,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:48:42,510 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:48:42,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 16:48:42,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:48:42,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:48:42,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 16:48:42,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:48:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-26 16:48:43,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:48:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-26 16:48:45,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749184918] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:48:45,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:48:45,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2023-08-26 16:48:45,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462287347] [2023-08-26 16:48:45,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:48:45,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 16:48:45,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:48:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 16:48:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2023-08-26 16:48:45,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 229 [2023-08-26 16:48:45,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 3509 transitions, 74711 flow. Second operand has 29 states, 29 states have (on average 77.75862068965517) internal successors, (2255), 29 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:48:45,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:48:45,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 229 [2023-08-26 16:48:45,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:49:15,808 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 78 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:49:17,545 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 16:49:52,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:50:14,712 WARN L539 Checker$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 16:50:18,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:50:30,736 WARN L539 Checker$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 16:50:32,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-26 16:50:50,590 WARN L539 Checker$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 16:50:52,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:50:54,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:50:56,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:51:00,897 WARN L539 Checker$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 16:51:37,122 WARN L234 SmtUtils]: Spent 8.93s on a formula simplification. DAG size of input: 90 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:52:26,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:52:27,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:52:30,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:53:44,340 WARN L234 SmtUtils]: Spent 9.13s on a formula simplification. DAG size of input: 96 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:53:46,472 WARN L539 Checker$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 16:54:05,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:54:31,897 WARN L234 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 89 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:56:00,935 WARN L539 Checker$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 16:56:03,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:56:08,260 WARN L539 Checker$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 16:56:11,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:56:37,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:56:50,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:57:18,034 WARN L234 SmtUtils]: Spent 14.99s on a formula simplification. DAG size of input: 90 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:57:59,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:58:01,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:58:02,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:58:23,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:58:24,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:58:33,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-26 16:58:34,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-26 16:58:36,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:58:38,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2023-08-26 16:58:52,346 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 16:58:52,346 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 16:58:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-08-26 16:58:52,447 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 16:58:52,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 16:58:52,652 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,SelfDestructingSolverStorable23 [2023-08-26 16:58:52,653 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 16:58:52,654 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 16:58:52,655 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 16:58:52,655 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 16:58:52,657 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 16:58:52,657 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 16:58:52,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:58:52 BasicIcfg [2023-08-26 16:58:52,659 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 16:58:52,660 INFO L158 Benchmark]: Toolchain (without parser) took 850196.70ms. Allocated memory was 369.1MB in the beginning and 3.9GB in the end (delta: 3.5GB). Free memory was 344.2MB in the beginning and 2.0GB in the end (delta: -1.7GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-08-26 16:58:52,660 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 369.1MB. Free memory was 345.4MB in the beginning and 345.3MB in the end (delta: 106.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 16:58:52,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.20ms. Allocated memory is still 369.1MB. Free memory was 344.2MB in the beginning and 332.9MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 16:58:52,660 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.39ms. Allocated memory is still 369.1MB. Free memory was 332.9MB in the beginning and 331.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:58:52,661 INFO L158 Benchmark]: Boogie Preprocessor took 30.99ms. Allocated memory is still 369.1MB. Free memory was 331.5MB in the beginning and 330.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:58:52,661 INFO L158 Benchmark]: RCFGBuilder took 428.86ms. Allocated memory is still 369.1MB. Free memory was 330.2MB in the beginning and 313.1MB in the end (delta: 17.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 16:58:52,661 INFO L158 Benchmark]: TraceAbstraction took 849428.44ms. Allocated memory was 369.1MB in the beginning and 3.9GB in the end (delta: 3.5GB). Free memory was 312.6MB in the beginning and 2.0GB in the end (delta: -1.7GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-08-26 16:58:52,662 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 369.1MB. Free memory was 345.4MB in the beginning and 345.3MB in the end (delta: 106.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 262.20ms. Allocated memory is still 369.1MB. Free memory was 344.2MB in the beginning and 332.9MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.39ms. Allocated memory is still 369.1MB. Free memory was 332.9MB in the beginning and 331.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 30.99ms. Allocated memory is still 369.1MB. Free memory was 331.5MB in the beginning and 330.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 428.86ms. Allocated memory is still 369.1MB. Free memory was 330.2MB in the beginning and 313.1MB in the end (delta: 17.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 849428.44ms. Allocated memory was 369.1MB in the beginning and 3.9GB in the end (delta: 3.5GB). Free memory was 312.6MB in the beginning and 2.0GB in the end (delta: -1.7GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 100 PlacesBefore, 26 PlacesAfterwards, 101 TransitionsBefore, 21 TransitionsAfterwards, 936 CoEnabledTransitionPairs, 7 FixpointIterations, 62 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 16 ConcurrentYvCompositions, 6 ChoiceCompositions, 117 TotalNumberOfCompositions, 1300 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1194, independent: 1182, independent conditional: 0, independent unconditional: 1182, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 552, independent: 543, independent conditional: 0, independent unconditional: 543, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1194, independent: 639, independent conditional: 0, independent unconditional: 639, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 552, unknown conditional: 0, unknown unconditional: 552] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 76/229 universal loopers) in iteration 24,while PetriNetUnfolder was constructing finite prefix that currently has 127314 conditions, 12911 events (7431/12910 cut-off events. For 239718/239718 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 107296 event pairs, 353 based on Foata normal form. 238/14041 useless extension candidates. Maximal degree in co-relation 127189. Up to 5842 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 129 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: 849.3s, OverallIterations: 24, TraceHistogramMax: 9, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 808.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 26 mSolverCounterUnknown, 2196 SdHoareTripleChecker+Valid, 135.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2196 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 133.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 622 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9580 IncrementalHoareTripleChecker+Invalid, 10228 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 622 mSolverCounterUnsat, 0 mSDtfsCounter, 9580 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 996 GetRequests, 346 SyntacticMatches, 20 SemanticMatches, 630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12748 ImplicationChecksByTransitivity, 593.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74711occurred in iteration=23, InterpolantAutomatonStates: 450, 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: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 30.8s InterpolantComputationTime, 582 NumberOfCodeBlocks, 577 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 780 ConstructedInterpolants, 0 QuantifiedInterpolants, 16515 SizeOfPredicates, 229 NumberOfNonLiveVariables, 1919 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 55 InterpolantComputations, 9 PerfectInterpolantSequences, 375/748 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