/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/goblint-regression/09-regions_17-arrayloop_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:30:58,501 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:30:58,571 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 15:30:58,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:30:58,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:30:58,596 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:30:58,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:30:58,597 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:30:58,597 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:30:58,597 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:30:58,598 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:30:58,598 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:30:58,598 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:30:58,599 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:30:58,599 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:30:58,599 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:30:58,599 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:30:58,600 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:30:58,600 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:30:58,600 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:30:58,601 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:30:58,604 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:30:58,604 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:30:58,605 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:30:58,608 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:30:58,608 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:30:58,608 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:30:58,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:58,609 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:30:58,609 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:30:58,610 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:30:58,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:30:58,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:30:58,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:30:58,610 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:30:58,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:30:58,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:30:58,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:30:58,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:30:58,945 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:30:58,948 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:30:58,950 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_17-arrayloop_nr.i [2023-08-26 15:31:00,149 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:31:00,452 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:31:00,454 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_17-arrayloop_nr.i [2023-08-26 15:31:00,472 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796978a7b/b8a9b3afdac848e5a89eb95b9b21ff80/FLAGdbc597a40 [2023-08-26 15:31:00,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796978a7b/b8a9b3afdac848e5a89eb95b9b21ff80 [2023-08-26 15:31:00,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:31:00,493 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:31:00,494 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:31:00,494 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:31:00,497 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:31:00,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:31:00" (1/1) ... [2023-08-26 15:31:00,498 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec7805a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:00, skipping insertion in model container [2023-08-26 15:31:00,498 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:31:00" (1/1) ... [2023-08-26 15:31:00,558 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:31:01,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:31:01,121 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:31:01,143 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:31:01,144 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:31:01,158 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1044] [2023-08-26 15:31:01,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:31:01,260 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:31:01,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01 WrapperNode [2023-08-26 15:31:01,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:31:01,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:31:01,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:31:01,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:31:01,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,331 INFO L138 Inliner]: procedures = 368, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 120 [2023-08-26 15:31:01,331 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:31:01,333 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:31:01,333 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:31:01,333 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:31:01,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,356 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,357 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,380 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,386 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:31:01,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:31:01,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:31:01,390 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:31:01,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (1/1) ... [2023-08-26 15:31:01,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:31:01,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:31:01,419 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 15:31:01,425 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 15:31:01,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:31:01,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 15:31:01,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:31:01,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:31:01,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:31:01,458 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:31:01,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 15:31:01,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:31:01,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 15:31:01,459 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:31:01,459 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:31:01,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:31:01,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:31:01,461 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 15:31:01,606 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:31:01,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:31:01,887 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:31:01,894 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:31:01,894 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 15:31:01,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:31:01 BoogieIcfgContainer [2023-08-26 15:31:01,896 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:31:01,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:31:01,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:31:01,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:31:01,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:31:00" (1/3) ... [2023-08-26 15:31:01,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ab0d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:31:01, skipping insertion in model container [2023-08-26 15:31:01,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:31:01" (2/3) ... [2023-08-26 15:31:01,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ab0d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:31:01, skipping insertion in model container [2023-08-26 15:31:01,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:31:01" (3/3) ... [2023-08-26 15:31:01,902 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_17-arrayloop_nr.i [2023-08-26 15:31:01,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:31:01,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-26 15:31:01,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:31:01,989 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:31:02,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 163 transitions, 331 flow [2023-08-26 15:31:02,090 INFO L124 PetriNetUnfolderBase]: 6/162 cut-off events. [2023-08-26 15:31:02,090 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:31:02,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 162 events. 6/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 388 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-26 15:31:02,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 163 transitions, 331 flow [2023-08-26 15:31:02,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 162 transitions, 327 flow [2023-08-26 15:31:02,110 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:31:02,122 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 162 transitions, 327 flow [2023-08-26 15:31:02,126 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 162 transitions, 327 flow [2023-08-26 15:31:02,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 162 transitions, 327 flow [2023-08-26 15:31:02,156 INFO L124 PetriNetUnfolderBase]: 6/162 cut-off events. [2023-08-26 15:31:02,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:31:02,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 162 events. 6/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 388 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-26 15:31:02,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 6468 [2023-08-26 15:31:07,673 INFO L134 LiptonReduction]: Checked pairs total: 18325 [2023-08-26 15:31:07,673 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-26 15:31:07,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:31:07,694 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;@14af2d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:31:07,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-08-26 15:31:07,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:31:07,697 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-26 15:31:07,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:31:07,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:07,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 15:31:07,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:07,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash 18086, now seen corresponding path program 1 times [2023-08-26 15:31:07,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:07,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780278672] [2023-08-26 15:31:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:07,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:07,886 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 15:31:07,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:07,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780278672] [2023-08-26 15:31:07,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780278672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:07,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:07,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:31:07,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943397147] [2023-08-26 15:31:07,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:07,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:07,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:07,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 291 [2023-08-26 15:31:07,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:07,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:07,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 291 [2023-08-26 15:31:07,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:08,274 INFO L124 PetriNetUnfolderBase]: 614/1689 cut-off events. [2023-08-26 15:31:08,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:31:08,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 1689 events. 614/1689 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11019 event pairs, 288 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 2902. Up to 655 conditions per place. [2023-08-26 15:31:08,286 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 77 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2023-08-26 15:31:08,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 365 flow [2023-08-26 15:31:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-26 15:31:08,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773195876288659 [2023-08-26 15:31:08,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-26 15:31:08,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-26 15:31:08,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:08,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-26 15:31:08,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,315 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 137 flow. Second operand 3 states and 504 transitions. [2023-08-26 15:31:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 365 flow [2023-08-26 15:31:08,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:31:08,320 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 156 flow [2023-08-26 15:31:08,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2023-08-26 15:31:08,324 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-26 15:31:08,324 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 156 flow [2023-08-26 15:31:08,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:08,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 15:31:08,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:31:08,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:08,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash 18110, now seen corresponding path program 1 times [2023-08-26 15:31:08,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:08,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397932863] [2023-08-26 15:31:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:08,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:08,596 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 15:31:08,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:08,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397932863] [2023-08-26 15:31:08,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397932863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:08,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:08,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:31:08,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998506574] [2023-08-26 15:31:08,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:08,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:08,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:08,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 291 [2023-08-26 15:31:08,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:08,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 291 [2023-08-26 15:31:08,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:08,876 INFO L124 PetriNetUnfolderBase]: 962/2125 cut-off events. [2023-08-26 15:31:08,877 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-26 15:31:08,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4168 conditions, 2125 events. 962/2125 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12619 event pairs, 874 based on Foata normal form. 0/1201 useless extension candidates. Maximal degree in co-relation 4137. Up to 1889 conditions per place. [2023-08-26 15:31:08,888 INFO L140 encePairwiseOnDemand]: 285/291 looper letters, 72 selfloop transitions, 2 changer transitions 1/82 dead transitions. [2023-08-26 15:31:08,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 340 flow [2023-08-26 15:31:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-26 15:31:08,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558991981672394 [2023-08-26 15:31:08,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-26 15:31:08,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-26 15:31:08,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:08,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-26 15:31:08,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,899 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 156 flow. Second operand 3 states and 398 transitions. [2023-08-26 15:31:08,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 340 flow [2023-08-26 15:31:08,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:31:08,904 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 154 flow [2023-08-26 15:31:08,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-26 15:31:08,905 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-08-26 15:31:08,909 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 154 flow [2023-08-26 15:31:08,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:08,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:08,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 15:31:08,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:31:08,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:08,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash 18111, now seen corresponding path program 1 times [2023-08-26 15:31:08,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:08,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660684669] [2023-08-26 15:31:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:08,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660684669] [2023-08-26 15:31:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660684669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:09,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:09,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:31:09,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645194729] [2023-08-26 15:31:09,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:09,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:09,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:09,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:09,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 291 [2023-08-26 15:31:09,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:09,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:09,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 291 [2023-08-26 15:31:09,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:09,390 INFO L124 PetriNetUnfolderBase]: 962/2122 cut-off events. [2023-08-26 15:31:09,390 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:31:09,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 2122 events. 962/2122 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12665 event pairs, 893 based on Foata normal form. 1/1200 useless extension candidates. Maximal degree in co-relation 4156. Up to 1929 conditions per place. [2023-08-26 15:31:09,401 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 53 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-26 15:31:09,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 264 flow [2023-08-26 15:31:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-26 15:31:09,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38258877434135163 [2023-08-26 15:31:09,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-26 15:31:09,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-26 15:31:09,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:09,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-26 15:31:09,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:09,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:09,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:09,407 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 154 flow. Second operand 3 states and 334 transitions. [2023-08-26 15:31:09,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 264 flow [2023-08-26 15:31:09,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:31:09,411 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 158 flow [2023-08-26 15:31:09,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-08-26 15:31:09,412 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-26 15:31:09,412 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 158 flow [2023-08-26 15:31:09,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:09,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:09,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:31:09,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:31:09,413 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:09,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash 562006, now seen corresponding path program 1 times [2023-08-26 15:31:09,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:09,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411802886] [2023-08-26 15:31:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:09,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:09,671 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 15:31:09,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:09,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411802886] [2023-08-26 15:31:09,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411802886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:31:09,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343430215] [2023-08-26 15:31:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:09,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:09,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:31:09,677 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 15:31:09,709 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 15:31:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:09,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-26 15:31:09,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:31:09,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:31:09,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:31:09,910 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 15:31:09,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 15:31:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:31:09,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:31:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:09,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:31:12,096 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:31:12,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-08-26 15:31:22,284 WARN L234 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 37 DAG size of output: 34 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 15:31:22,285 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 15:31:22,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343430215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:31:22,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:31:22,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 15:31:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740774851] [2023-08-26 15:31:22,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:31:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:31:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:31:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:31:22,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 291 [2023-08-26 15:31:22,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 76.125) internal successors, (609), 8 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:22,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 291 [2023-08-26 15:31:22,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:23,259 INFO L124 PetriNetUnfolderBase]: 1324/2660 cut-off events. [2023-08-26 15:31:23,259 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-26 15:31:23,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 2660 events. 1324/2660 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 15960 event pairs, 42 based on Foata normal form. 3/1230 useless extension candidates. Maximal degree in co-relation 5491. Up to 1523 conditions per place. [2023-08-26 15:31:23,273 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 108 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2023-08-26 15:31:23,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 119 transitions, 536 flow [2023-08-26 15:31:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:31:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:31:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2023-08-26 15:31:23,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32875143184421535 [2023-08-26 15:31:23,276 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2023-08-26 15:31:23,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2023-08-26 15:31:23,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:23,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2023-08-26 15:31:23,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,281 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,281 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 158 flow. Second operand 6 states and 574 transitions. [2023-08-26 15:31:23,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 119 transitions, 536 flow [2023-08-26 15:31:23,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 119 transitions, 532 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 15:31:23,285 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 225 flow [2023-08-26 15:31:23,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=225, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-08-26 15:31:23,287 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-26 15:31:23,288 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 225 flow [2023-08-26 15:31:23,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.125) internal successors, (609), 8 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:23,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-26 15:31:23,300 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 15:31:23,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:23,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:23,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 17422726, now seen corresponding path program 1 times [2023-08-26 15:31:23,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:23,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825633638] [2023-08-26 15:31:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:23,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:23,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825633638] [2023-08-26 15:31:23,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825633638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:31:23,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759631588] [2023-08-26 15:31:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:23,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:23,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:31:23,569 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 15:31:23,571 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 15:31:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:23,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 15:31:23,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:31:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:23,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:31:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:23,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759631588] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:31:23,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:31:23,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 15:31:23,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876850064] [2023-08-26 15:31:23,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:31:23,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:31:23,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:23,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:31:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:31:23,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 291 [2023-08-26 15:31:23,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 225 flow. Second operand has 8 states, 8 states have (on average 138.0) internal successors, (1104), 8 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:23,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 291 [2023-08-26 15:31:23,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:24,575 INFO L124 PetriNetUnfolderBase]: 1788/4718 cut-off events. [2023-08-26 15:31:24,577 INFO L125 PetriNetUnfolderBase]: For 591/591 co-relation queries the response was YES. [2023-08-26 15:31:24,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9033 conditions, 4718 events. 1788/4718 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 29768 event pairs, 32 based on Foata normal form. 89/3046 useless extension candidates. Maximal degree in co-relation 8997. Up to 598 conditions per place. [2023-08-26 15:31:24,609 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 223 selfloop transitions, 16 changer transitions 0/256 dead transitions. [2023-08-26 15:31:24,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 256 transitions, 1150 flow [2023-08-26 15:31:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 15:31:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 15:31:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1352 transitions. [2023-08-26 15:31:24,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807560137457045 [2023-08-26 15:31:24,613 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1352 transitions. [2023-08-26 15:31:24,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1352 transitions. [2023-08-26 15:31:24,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:24,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1352 transitions. [2023-08-26 15:31:24,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,621 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,622 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 225 flow. Second operand 8 states and 1352 transitions. [2023-08-26 15:31:24,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 256 transitions, 1150 flow [2023-08-26 15:31:24,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 256 transitions, 1142 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 15:31:24,634 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 355 flow [2023-08-26 15:31:24,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=355, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2023-08-26 15:31:24,637 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-08-26 15:31:24,637 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 355 flow [2023-08-26 15:31:24,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.0) internal successors, (1104), 8 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:24,638 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-26 15:31:24,653 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 15:31:24,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:24,844 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:24,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash -436587393, now seen corresponding path program 2 times [2023-08-26 15:31:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:24,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80499632] [2023-08-26 15:31:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:24,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:25,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:25,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80499632] [2023-08-26 15:31:25,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80499632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:31:25,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664846214] [2023-08-26 15:31:25,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:31:25,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:25,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:31:25,573 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 15:31:25,597 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 15:31:25,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 15:31:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:31:25,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-26 15:31:25,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:31:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:31:25,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:31:25,794 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 15:31:25,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 15:31:25,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:31:25,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:31:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:31:25,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:31:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:31:25,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:31:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:31:25,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:31:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:25,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:31:30,063 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:31:30,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-08-26 15:31:32,185 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:31:32,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2023-08-26 15:31:36,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:31:36,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2023-08-26 15:31:36,666 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:31:36,667 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2023-08-26 15:31:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:38,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664846214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:31:38,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:31:38,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-26 15:31:38,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940703353] [2023-08-26 15:31:38,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:31:38,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 15:31:38,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:38,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 15:31:38,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-26 15:31:38,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 291 [2023-08-26 15:31:38,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 355 flow. Second operand has 17 states, 17 states have (on average 77.05882352941177) internal successors, (1310), 17 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:38,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:38,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 291 [2023-08-26 15:31:38,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:42,072 INFO L124 PetriNetUnfolderBase]: 3856/7734 cut-off events. [2023-08-26 15:31:42,072 INFO L125 PetriNetUnfolderBase]: For 1624/1624 co-relation queries the response was YES. [2023-08-26 15:31:42,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17327 conditions, 7734 events. 3856/7734 cut-off events. For 1624/1624 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 47282 event pairs, 0 based on Foata normal form. 6/3782 useless extension candidates. Maximal degree in co-relation 17293. Up to 4515 conditions per place. [2023-08-26 15:31:42,118 INFO L140 encePairwiseOnDemand]: 284/291 looper letters, 183 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2023-08-26 15:31:42,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 206 transitions, 1219 flow [2023-08-26 15:31:42,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:31:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:31:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1118 transitions. [2023-08-26 15:31:42,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3201603665521191 [2023-08-26 15:31:42,123 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1118 transitions. [2023-08-26 15:31:42,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1118 transitions. [2023-08-26 15:31:42,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:42,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1118 transitions. [2023-08-26 15:31:42,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.16666666666667) internal successors, (1118), 12 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:42,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:42,131 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:42,131 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 355 flow. Second operand 12 states and 1118 transitions. [2023-08-26 15:31:42,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 206 transitions, 1219 flow [2023-08-26 15:31:42,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 206 transitions, 1162 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-26 15:31:42,149 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 424 flow [2023-08-26 15:31:42,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=424, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2023-08-26 15:31:42,152 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 28 predicate places. [2023-08-26 15:31:42,152 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 424 flow [2023-08-26 15:31:42,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.05882352941177) internal successors, (1310), 17 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:42,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:42,153 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1] [2023-08-26 15:31:42,161 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 15:31:42,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:42,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:42,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:42,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1346328390, now seen corresponding path program 2 times [2023-08-26 15:31:42,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598022024] [2023-08-26 15:31:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:42,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:42,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598022024] [2023-08-26 15:31:42,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598022024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:31:42,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091513441] [2023-08-26 15:31:42,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:31:42,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:42,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:31:42,554 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 15:31:42,556 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 15:31:42,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 15:31:42,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:31:42,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 15:31:42,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:31:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:42,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:31:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091513441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:31:42,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:31:42,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-08-26 15:31:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075227573] [2023-08-26 15:31:42,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:31:42,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 15:31:42,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 15:31:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-26 15:31:42,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 291 [2023-08-26 15:31:42,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 424 flow. Second operand has 12 states, 12 states have (on average 138.08333333333334) internal successors, (1657), 12 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:42,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:42,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 291 [2023-08-26 15:31:42,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:44,217 INFO L124 PetriNetUnfolderBase]: 2943/7780 cut-off events. [2023-08-26 15:31:44,218 INFO L125 PetriNetUnfolderBase]: For 3617/3617 co-relation queries the response was YES. [2023-08-26 15:31:44,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15912 conditions, 7780 events. 2943/7780 cut-off events. For 3617/3617 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 49250 event pairs, 32 based on Foata normal form. 72/4935 useless extension candidates. Maximal degree in co-relation 15839. Up to 597 conditions per place. [2023-08-26 15:31:44,256 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 353 selfloop transitions, 24 changer transitions 0/394 dead transitions. [2023-08-26 15:31:44,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 394 transitions, 1930 flow [2023-08-26 15:31:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:31:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:31:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2037 transitions. [2023-08-26 15:31:44,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-26 15:31:44,262 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2037 transitions. [2023-08-26 15:31:44,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2037 transitions. [2023-08-26 15:31:44,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:44,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2037 transitions. [2023-08-26 15:31:44,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 169.75) internal successors, (2037), 12 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:44,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:44,273 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:44,273 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 424 flow. Second operand 12 states and 2037 transitions. [2023-08-26 15:31:44,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 394 transitions, 1930 flow [2023-08-26 15:31:44,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 394 transitions, 1854 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-26 15:31:44,284 INFO L231 Difference]: Finished difference. Result has 108 places, 81 transitions, 495 flow [2023-08-26 15:31:44,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=495, PETRI_PLACES=108, PETRI_TRANSITIONS=81} [2023-08-26 15:31:44,285 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 40 predicate places. [2023-08-26 15:31:44,285 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 81 transitions, 495 flow [2023-08-26 15:31:44,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.08333333333334) internal successors, (1657), 12 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:44,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:44,286 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-26 15:31:44,299 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 15:31:44,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:44,493 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:44,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -385878753, now seen corresponding path program 3 times [2023-08-26 15:31:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:44,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900815474] [2023-08-26 15:31:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:44,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:44,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900815474] [2023-08-26 15:31:44,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900815474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:31:44,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726109997] [2023-08-26 15:31:44,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 15:31:44,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:44,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:31:44,853 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 15:31:44,856 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 15:31:54,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-26 15:31:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:31:54,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 15:31:54,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:31:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:55,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:31:55,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726109997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:55,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:31:55,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 12 [2023-08-26 15:31:55,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665994351] [2023-08-26 15:31:55,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:55,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 15:31:55,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:55,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 15:31:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-08-26 15:31:55,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 291 [2023-08-26 15:31:55,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 81 transitions, 495 flow. Second operand has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:55,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:55,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 291 [2023-08-26 15:31:55,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:56,369 INFO L124 PetriNetUnfolderBase]: 2925/7761 cut-off events. [2023-08-26 15:31:56,369 INFO L125 PetriNetUnfolderBase]: For 3823/3823 co-relation queries the response was YES. [2023-08-26 15:31:56,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15897 conditions, 7761 events. 2925/7761 cut-off events. For 3823/3823 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 49385 event pairs, 32 based on Foata normal form. 19/4863 useless extension candidates. Maximal degree in co-relation 15829. Up to 579 conditions per place. [2023-08-26 15:31:56,407 INFO L140 encePairwiseOnDemand]: 285/291 looper letters, 352 selfloop transitions, 22 changer transitions 0/391 dead transitions. [2023-08-26 15:31:56,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 391 transitions, 1922 flow [2023-08-26 15:31:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 15:31:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 15:31:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2158 transitions. [2023-08-26 15:31:56,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570446735395189 [2023-08-26 15:31:56,412 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2158 transitions. [2023-08-26 15:31:56,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2158 transitions. [2023-08-26 15:31:56,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:56,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2158 transitions. [2023-08-26 15:31:56,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 166.0) internal successors, (2158), 13 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:56,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:56,423 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:56,423 INFO L175 Difference]: Start difference. First operand has 108 places, 81 transitions, 495 flow. Second operand 13 states and 2158 transitions. [2023-08-26 15:31:56,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 391 transitions, 1922 flow [2023-08-26 15:31:56,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 391 transitions, 1836 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-26 15:31:56,436 INFO L231 Difference]: Finished difference. Result has 108 places, 78 transitions, 442 flow [2023-08-26 15:31:56,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=442, PETRI_PLACES=108, PETRI_TRANSITIONS=78} [2023-08-26 15:31:56,437 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 40 predicate places. [2023-08-26 15:31:56,437 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 78 transitions, 442 flow [2023-08-26 15:31:56,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:56,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:56,438 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-26 15:31:56,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 15:31:56,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:56,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:31:56,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash -385878778, now seen corresponding path program 3 times [2023-08-26 15:31:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:56,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570003614] [2023-08-26 15:31:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-08-26 15:31:57,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570003614] [2023-08-26 15:31:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570003614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:31:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659905748] [2023-08-26 15:31:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 15:31:57,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:31:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:31:57,405 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 15:31:57,409 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 15:32:52,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-26 15:32:52,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:32:52,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-26 15:32:52,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:32:52,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 15:32:52,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:52,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:52,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:52,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:52,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,898 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-26 15:32:52,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,916 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-26 15:32:52,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:52,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:52,942 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,968 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-26 15:32:52,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:52,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-26 15:32:52,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:32:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-26 15:32:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659905748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:32:53,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:32:53,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 3 [2023-08-26 15:32:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472253733] [2023-08-26 15:32:53,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:32:53,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:32:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:32:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:32:53,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:32:53,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 291 [2023-08-26 15:32:53,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 78 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:53,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:32:53,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 291 [2023-08-26 15:32:53,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:32:54,572 INFO L124 PetriNetUnfolderBase]: 4029/9413 cut-off events. [2023-08-26 15:32:54,572 INFO L125 PetriNetUnfolderBase]: For 2710/2710 co-relation queries the response was YES. [2023-08-26 15:32:54,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19522 conditions, 9413 events. 4029/9413 cut-off events. For 2710/2710 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 59972 event pairs, 3798 based on Foata normal form. 0/5785 useless extension candidates. Maximal degree in co-relation 19418. Up to 8051 conditions per place. [2023-08-26 15:32:54,623 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 83 selfloop transitions, 2 changer transitions 1/96 dead transitions. [2023-08-26 15:32:54,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 96 transitions, 630 flow [2023-08-26 15:32:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:32:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:32:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-26 15:32:54,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524627720504009 [2023-08-26 15:32:54,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-26 15:32:54,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-26 15:32:54,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:32:54,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-26 15:32:54,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:54,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:54,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:54,628 INFO L175 Difference]: Start difference. First operand has 108 places, 78 transitions, 442 flow. Second operand 3 states and 395 transitions. [2023-08-26 15:32:54,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 96 transitions, 630 flow [2023-08-26 15:32:54,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 96 transitions, 586 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-26 15:32:54,639 INFO L231 Difference]: Finished difference. Result has 97 places, 77 transitions, 380 flow [2023-08-26 15:32:54,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=97, PETRI_TRANSITIONS=77} [2023-08-26 15:32:54,639 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 29 predicate places. [2023-08-26 15:32:54,640 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 77 transitions, 380 flow [2023-08-26 15:32:54,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:54,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:32:54,640 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-26 15:32:54,664 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 15:32:54,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:32:54,864 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:32:54,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:32:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash -385878779, now seen corresponding path program 1 times [2023-08-26 15:32:54,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:32:54,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352129639] [2023-08-26 15:32:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:32:54,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:32:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:32:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-26 15:32:55,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:32:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352129639] [2023-08-26 15:32:55,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352129639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:32:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571727743] [2023-08-26 15:32:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:32:55,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:32:55,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:32:55,697 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 15:32:55,701 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 15:32:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:32:56,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-26 15:32:56,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:32:56,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 15:32:56,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 15:32:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,059 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,069 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 15:32:56,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 15:32:56,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:32:56,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:32:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-26 15:32:56,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:32:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-26 15:32:57,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571727743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:32:57,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:32:57,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 6 [2023-08-26 15:32:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742893776] [2023-08-26 15:32:57,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:32:57,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:32:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:32:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:32:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:32:57,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 291 [2023-08-26 15:32:57,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 77 transitions, 380 flow. Second operand has 8 states, 8 states have (on average 92.375) internal successors, (739), 8 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:57,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:32:57,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 291 [2023-08-26 15:32:57,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:32:58,975 INFO L124 PetriNetUnfolderBase]: 6205/12444 cut-off events. [2023-08-26 15:32:58,975 INFO L125 PetriNetUnfolderBase]: For 2370/2370 co-relation queries the response was YES. [2023-08-26 15:32:58,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26973 conditions, 12444 events. 6205/12444 cut-off events. For 2370/2370 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 75763 event pairs, 5901 based on Foata normal form. 0/5968 useless extension candidates. Maximal degree in co-relation 26891. Up to 12399 conditions per place. [2023-08-26 15:32:59,037 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 95 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2023-08-26 15:32:59,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 98 transitions, 598 flow [2023-08-26 15:32:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:32:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:32:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-26 15:32:59,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043528064146621 [2023-08-26 15:32:59,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-26 15:32:59,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-26 15:32:59,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:32:59,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-26 15:32:59,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:59,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:59,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:59,042 INFO L175 Difference]: Start difference. First operand has 97 places, 77 transitions, 380 flow. Second operand 3 states and 353 transitions. [2023-08-26 15:32:59,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 98 transitions, 598 flow [2023-08-26 15:32:59,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 594 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:32:59,054 INFO L231 Difference]: Finished difference. Result has 96 places, 76 transitions, 358 flow [2023-08-26 15:32:59,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=96, PETRI_TRANSITIONS=76} [2023-08-26 15:32:59,055 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 28 predicate places. [2023-08-26 15:32:59,055 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 76 transitions, 358 flow [2023-08-26 15:32:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 92.375) internal successors, (739), 8 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:59,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:32:59,056 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:32:59,065 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 15:32:59,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:32:59,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:32:59,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:32:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash 266734461, now seen corresponding path program 1 times [2023-08-26 15:32:59,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:32:59,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021889237] [2023-08-26 15:32:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:32:59,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:32:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:32:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:32:59,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:32:59,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021889237] [2023-08-26 15:32:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021889237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:32:59,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:32:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:32:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870839896] [2023-08-26 15:32:59,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:32:59,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:32:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:32:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:32:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:32:59,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 291 [2023-08-26 15:32:59,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 76 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:32:59,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:32:59,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 291 [2023-08-26 15:32:59,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:00,712 INFO L124 PetriNetUnfolderBase]: 4441/9720 cut-off events. [2023-08-26 15:33:00,712 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2023-08-26 15:33:00,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20534 conditions, 9720 events. 4441/9720 cut-off events. For 2157/2157 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 60283 event pairs, 4218 based on Foata normal form. 0/5890 useless extension candidates. Maximal degree in co-relation 20452. Up to 8912 conditions per place. [2023-08-26 15:33:00,746 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 66 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-26 15:33:00,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 74 transitions, 488 flow [2023-08-26 15:33:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:33:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:33:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-26 15:33:00,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41924398625429554 [2023-08-26 15:33:00,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-26 15:33:00,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-26 15:33:00,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:00,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-26 15:33:00,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:00,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:00,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:00,751 INFO L175 Difference]: Start difference. First operand has 96 places, 76 transitions, 358 flow. Second operand 3 states and 366 transitions. [2023-08-26 15:33:00,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 74 transitions, 488 flow [2023-08-26 15:33:00,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 74 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:33:00,762 INFO L231 Difference]: Finished difference. Result has 94 places, 74 transitions, 352 flow [2023-08-26 15:33:00,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2023-08-26 15:33:00,762 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 26 predicate places. [2023-08-26 15:33:00,762 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 352 flow [2023-08-26 15:33:00,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:00,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:00,763 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:00,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:33:00,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:33:00,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash 266734460, now seen corresponding path program 1 times [2023-08-26 15:33:00,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:00,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266447167] [2023-08-26 15:33:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:33:00,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:00,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266447167] [2023-08-26 15:33:00,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266447167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:00,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:00,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:33:00,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071478504] [2023-08-26 15:33:00,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:00,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:33:00,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:33:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:33:00,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 291 [2023-08-26 15:33:00,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:00,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:00,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 291 [2023-08-26 15:33:00,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:01,838 INFO L124 PetriNetUnfolderBase]: 3459/8085 cut-off events. [2023-08-26 15:33:01,838 INFO L125 PetriNetUnfolderBase]: For 1899/1899 co-relation queries the response was YES. [2023-08-26 15:33:01,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16822 conditions, 8085 events. 3459/8085 cut-off events. For 1899/1899 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 49921 event pairs, 3258 based on Foata normal form. 0/5298 useless extension candidates. Maximal degree in co-relation 16794. Up to 6909 conditions per place. [2023-08-26 15:33:01,865 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 79 selfloop transitions, 2 changer transitions 1/91 dead transitions. [2023-08-26 15:33:01,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 550 flow [2023-08-26 15:33:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:33:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:33:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-26 15:33:01,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42955326460481097 [2023-08-26 15:33:01,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-26 15:33:01,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-26 15:33:01,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:01,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-26 15:33:01,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:01,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:01,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:01,871 INFO L175 Difference]: Start difference. First operand has 94 places, 74 transitions, 352 flow. Second operand 3 states and 375 transitions. [2023-08-26 15:33:01,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 550 flow [2023-08-26 15:33:01,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:33:01,881 INFO L231 Difference]: Finished difference. Result has 93 places, 72 transitions, 351 flow [2023-08-26 15:33:01,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=93, PETRI_TRANSITIONS=72} [2023-08-26 15:33:01,882 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 25 predicate places. [2023-08-26 15:33:01,882 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 72 transitions, 351 flow [2023-08-26 15:33:01,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:01,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:01,883 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:01,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:33:01,883 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:33:01,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash 266732231, now seen corresponding path program 1 times [2023-08-26 15:33:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:01,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4609047] [2023-08-26 15:33:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:01,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:33:02,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:02,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4609047] [2023-08-26 15:33:02,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4609047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:02,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:02,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:33:02,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868536470] [2023-08-26 15:33:02,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:02,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:33:02,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:33:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:33:02,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2023-08-26 15:33:02,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 72 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:02,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:02,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2023-08-26 15:33:02,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:03,029 INFO L124 PetriNetUnfolderBase]: 3823/8302 cut-off events. [2023-08-26 15:33:03,029 INFO L125 PetriNetUnfolderBase]: For 4103/4103 co-relation queries the response was YES. [2023-08-26 15:33:03,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17823 conditions, 8302 events. 3823/8302 cut-off events. For 4103/4103 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 50134 event pairs, 546 based on Foata normal form. 0/5386 useless extension candidates. Maximal degree in co-relation 17794. Up to 6374 conditions per place. [2023-08-26 15:33:03,062 INFO L140 encePairwiseOnDemand]: 285/291 looper letters, 108 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2023-08-26 15:33:03,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 120 transitions, 790 flow [2023-08-26 15:33:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:33:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:33:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-26 15:33:03,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46849942726231386 [2023-08-26 15:33:03,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-26 15:33:03,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-26 15:33:03,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:03,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-26 15:33:03,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:03,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:03,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:03,067 INFO L175 Difference]: Start difference. First operand has 93 places, 72 transitions, 351 flow. Second operand 3 states and 409 transitions. [2023-08-26 15:33:03,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 120 transitions, 790 flow [2023-08-26 15:33:03,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 784 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:33:03,074 INFO L231 Difference]: Finished difference. Result has 95 places, 76 transitions, 404 flow [2023-08-26 15:33:03,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=95, PETRI_TRANSITIONS=76} [2023-08-26 15:33:03,075 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2023-08-26 15:33:03,075 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 76 transitions, 404 flow [2023-08-26 15:33:03,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:03,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:03,075 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:03,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:33:03,075 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:33:03,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash 266732232, now seen corresponding path program 1 times [2023-08-26 15:33:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:03,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895238287] [2023-08-26 15:33:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:33:03,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:03,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895238287] [2023-08-26 15:33:03,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895238287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:03,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:03,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:33:03,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697198721] [2023-08-26 15:33:03,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:03,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:33:03,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:33:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:33:03,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 291 [2023-08-26 15:33:03,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 76 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:03,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:03,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 291 [2023-08-26 15:33:03,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:04,127 INFO L124 PetriNetUnfolderBase]: 4041/8496 cut-off events. [2023-08-26 15:33:04,127 INFO L125 PetriNetUnfolderBase]: For 4793/4793 co-relation queries the response was YES. [2023-08-26 15:33:04,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19569 conditions, 8496 events. 4041/8496 cut-off events. For 4793/4793 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 49939 event pairs, 619 based on Foata normal form. 408/6073 useless extension candidates. Maximal degree in co-relation 19540. Up to 6701 conditions per place. [2023-08-26 15:33:04,165 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 101 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-26 15:33:04,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 772 flow [2023-08-26 15:33:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:33:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:33:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-26 15:33:04,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46048109965635736 [2023-08-26 15:33:04,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-26 15:33:04,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-26 15:33:04,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:04,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-26 15:33:04,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:04,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:04,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:04,169 INFO L175 Difference]: Start difference. First operand has 95 places, 76 transitions, 404 flow. Second operand 3 states and 402 transitions. [2023-08-26 15:33:04,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 772 flow [2023-08-26 15:33:04,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 108 transitions, 762 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:33:04,182 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 401 flow [2023-08-26 15:33:04,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-26 15:33:04,182 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 26 predicate places. [2023-08-26 15:33:04,183 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 401 flow [2023-08-26 15:33:04,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:04,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:04,183 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:04,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 15:33:04,183 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:33:04,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1366207234, now seen corresponding path program 1 times [2023-08-26 15:33:04,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:04,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140368126] [2023-08-26 15:33:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:04,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:33:04,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:04,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140368126] [2023-08-26 15:33:04,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140368126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:33:04,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127852588] [2023-08-26 15:33:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:04,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:33:04,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:33:04,793 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 15:33:04,798 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 15:33:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:05,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 15:33:05,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:33:05,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:05,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 15:33:05,399 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 15:33:05,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 15:33:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:33:05,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:33:08,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-08-26 15:33:08,569 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:33:08,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 62 [2023-08-26 15:33:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:33:08,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127852588] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:33:08,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:33:08,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-26 15:33:08,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673705359] [2023-08-26 15:33:08,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:33:08,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 15:33:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 15:33:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1073, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 15:33:08,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 291 [2023-08-26 15:33:08,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 401 flow. Second operand has 40 states, 40 states have (on average 77.425) internal successors, (3097), 40 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:08,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 291 [2023-08-26 15:33:08,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:12,373 INFO L124 PetriNetUnfolderBase]: 4663/9397 cut-off events. [2023-08-26 15:33:12,373 INFO L125 PetriNetUnfolderBase]: For 3673/3673 co-relation queries the response was YES. [2023-08-26 15:33:12,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21928 conditions, 9397 events. 4663/9397 cut-off events. For 3673/3673 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 49946 event pairs, 40 based on Foata normal form. 420/5692 useless extension candidates. Maximal degree in co-relation 21899. Up to 925 conditions per place. [2023-08-26 15:33:12,410 INFO L140 encePairwiseOnDemand]: 282/291 looper letters, 587 selfloop transitions, 32 changer transitions 2/621 dead transitions. [2023-08-26 15:33:12,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 621 transitions, 2987 flow [2023-08-26 15:33:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 15:33:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 15:33:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2290 transitions. [2023-08-26 15:33:12,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577007185254608 [2023-08-26 15:33:12,416 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2290 transitions. [2023-08-26 15:33:12,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2290 transitions. [2023-08-26 15:33:12,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:12,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2290 transitions. [2023-08-26 15:33:12,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 104.0909090909091) internal successors, (2290), 22 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:12,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 291.0) internal successors, (6693), 23 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:12,434 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 291.0) internal successors, (6693), 23 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:12,435 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 401 flow. Second operand 22 states and 2290 transitions. [2023-08-26 15:33:12,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 621 transitions, 2987 flow [2023-08-26 15:33:12,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 621 transitions, 2961 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 15:33:12,453 INFO L231 Difference]: Finished difference. Result has 113 places, 82 transitions, 497 flow [2023-08-26 15:33:12,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=497, PETRI_PLACES=113, PETRI_TRANSITIONS=82} [2023-08-26 15:33:12,453 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 45 predicate places. [2023-08-26 15:33:12,454 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 82 transitions, 497 flow [2023-08-26 15:33:12,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 77.425) internal successors, (3097), 40 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:12,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:12,455 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:12,467 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 15:33:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 15:33:12,665 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:33:12,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1368349496, now seen corresponding path program 1 times [2023-08-26 15:33:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:12,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134168715] [2023-08-26 15:33:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:12,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:33:13,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:13,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134168715] [2023-08-26 15:33:13,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134168715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:33:13,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774207987] [2023-08-26 15:33:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:13,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:33:13,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:33:13,277 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 15:33:13,278 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 15:33:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:13,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 15:33:13,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:33:13,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:13,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 15:33:13,946 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 15:33:13,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 15:33:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:33:13,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:33:16,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-08-26 15:33:16,338 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:33:16,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 62 [2023-08-26 15:33:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:33:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774207987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:33:16,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:33:16,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-26 15:33:16,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380711518] [2023-08-26 15:33:16,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:33:16,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 15:33:16,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 15:33:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 15:33:16,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 291 [2023-08-26 15:33:16,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 82 transitions, 497 flow. Second operand has 40 states, 40 states have (on average 68.425) internal successors, (2737), 40 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:16,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:16,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 291 [2023-08-26 15:33:16,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:22,095 INFO L124 PetriNetUnfolderBase]: 8659/17469 cut-off events. [2023-08-26 15:33:22,095 INFO L125 PetriNetUnfolderBase]: For 10919/10919 co-relation queries the response was YES. [2023-08-26 15:33:22,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41843 conditions, 17469 events. 8659/17469 cut-off events. For 10919/10919 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 109300 event pairs, 161 based on Foata normal form. 451/10856 useless extension candidates. Maximal degree in co-relation 41811. Up to 2024 conditions per place. [2023-08-26 15:33:22,227 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 1048 selfloop transitions, 94 changer transitions 3/1145 dead transitions. [2023-08-26 15:33:22,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 1145 transitions, 5649 flow [2023-08-26 15:33:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 15:33:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 15:33:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3649 transitions. [2023-08-26 15:33:22,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33890591622550387 [2023-08-26 15:33:22,234 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3649 transitions. [2023-08-26 15:33:22,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3649 transitions. [2023-08-26 15:33:22,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:22,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3649 transitions. [2023-08-26 15:33:22,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 98.62162162162163) internal successors, (3649), 37 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:22,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 291.0) internal successors, (11058), 38 states have internal predecessors, (11058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:22,255 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 291.0) internal successors, (11058), 38 states have internal predecessors, (11058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:22,255 INFO L175 Difference]: Start difference. First operand has 113 places, 82 transitions, 497 flow. Second operand 37 states and 3649 transitions. [2023-08-26 15:33:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 1145 transitions, 5649 flow [2023-08-26 15:33:22,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 1145 transitions, 5440 flow, removed 32 selfloop flow, removed 13 redundant places. [2023-08-26 15:33:22,443 INFO L231 Difference]: Finished difference. Result has 169 places, 152 transitions, 1235 flow [2023-08-26 15:33:22,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1235, PETRI_PLACES=169, PETRI_TRANSITIONS=152} [2023-08-26 15:33:22,443 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 101 predicate places. [2023-08-26 15:33:22,443 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 152 transitions, 1235 flow [2023-08-26 15:33:22,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 68.425) internal successors, (2737), 40 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:22,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:22,444 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:22,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 15:33:22,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 15:33:22,645 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 15:33:22,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:22,645 INFO L85 PathProgramCache]: Analyzing trace with hash 597257618, now seen corresponding path program 1 times [2023-08-26 15:33:22,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:22,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100843991] [2023-08-26 15:33:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:22,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:33:26,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100843991] [2023-08-26 15:33:26,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100843991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:33:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705452045] [2023-08-26 15:33:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:26,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:33:26,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:33:26,874 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 15:33:26,879 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 15:33:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:27,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 183 conjunts are in the unsatisfiable core [2023-08-26 15:33:27,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:33:27,414 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 15:33:27,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 15:33:27,467 INFO L322 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-08-26 15:33:27,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-08-26 15:33:27,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-26 15:33:27,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-08-26 15:33:27,487 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-08-26 15:33:27,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-26 15:33:27,521 INFO L160 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:33:27,522 INFO L165 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2023-08-26 15:33:27,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 15:33:27,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:27,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:27,638 INFO L322 Elim1Store]: treesize reduction 38, result has 43.3 percent of original size [2023-08-26 15:33:27,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 101 [2023-08-26 15:33:27,685 INFO L322 Elim1Store]: treesize reduction 47, result has 37.3 percent of original size [2023-08-26 15:33:27,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 86 [2023-08-26 15:33:27,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-08-26 15:33:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:27,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-08-26 15:33:27,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 15:33:27,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:27,845 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 15:33:27,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 45 [2023-08-26 15:33:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:27,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-08-26 15:33:27,863 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:33:27,880 INFO L322 Elim1Store]: treesize reduction 55, result has 28.6 percent of original size [2023-08-26 15:33:27,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 36 [2023-08-26 15:33:28,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 15:33:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-08-26 15:33:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-08-26 15:33:28,040 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:33:28,064 INFO L322 Elim1Store]: treesize reduction 73, result has 29.8 percent of original size [2023-08-26 15:33:28,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 48 [2023-08-26 15:33:28,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 15:33:28,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 59 [2023-08-26 15:33:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-26 15:33:28,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:33:28,237 INFO L322 Elim1Store]: treesize reduction 91, result has 30.5 percent of original size [2023-08-26 15:33:28,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 60 [2023-08-26 15:33:28,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 77 [2023-08-26 15:33:28,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-08-26 15:33:28,458 INFO L322 Elim1Store]: treesize reduction 119, result has 29.2 percent of original size [2023-08-26 15:33:28,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 41 treesize of output 72 [2023-08-26 15:33:28,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 15:33:28,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,644 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 77 [2023-08-26 15:33:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:28,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-08-26 15:33:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:33:28,738 INFO L322 Elim1Store]: treesize reduction 109, result has 31.0 percent of original size [2023-08-26 15:33:28,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 41 treesize of output 72 [2023-08-26 15:33:28,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 15:33:28,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 95 [2023-08-26 15:33:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-26 15:33:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:33:29,120 INFO L322 Elim1Store]: treesize reduction 127, result has 31.4 percent of original size [2023-08-26 15:33:29,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 46 treesize of output 84 [2023-08-26 15:33:29,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 15:33:29,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 113 [2023-08-26 15:33:29,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:29,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2023-08-26 15:33:29,506 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:33:29,579 INFO L322 Elim1Store]: treesize reduction 145, result has 31.6 percent of original size [2023-08-26 15:33:29,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 96 [2023-08-26 15:33:29,989 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 15:33:30,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 131 [2023-08-26 15:33:30,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:33:30,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-26 15:33:30,072 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:33:30,166 INFO L322 Elim1Store]: treesize reduction 163, result has 31.8 percent of original size [2023-08-26 15:33:30,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 27 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 56 treesize of output 108 [2023-08-26 15:33:31,919 INFO L322 Elim1Store]: treesize reduction 70, result has 47.8 percent of original size [2023-08-26 15:33:31,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 135 treesize of output 172 [2023-08-26 15:34:05,167 INFO L322 Elim1Store]: treesize reduction 186, result has 32.6 percent of original size [2023-08-26 15:34:05,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 35 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 61 treesize of output 125 [2023-08-26 15:34:05,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 35 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 138 [2023-08-26 15:34:06,809 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 35 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 138 [2023-08-26 15:34:16,519 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 33 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 59 [2023-08-26 15:34:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 19 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:34:16,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:34:17,167 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:34:17,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2023-08-26 15:34:17,247 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:34:17,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 87 [2023-08-26 15:34:17,379 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:34:17,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 162 [2023-08-26 15:34:17,560 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:34:17,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 309 [2023-08-26 15:34:20,303 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:34:20,304 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1490 treesize of output 1179 [2023-08-26 15:34:22,916 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:34:22,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2965 treesize of output 2334 [2023-08-26 15:34:27,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:34:27,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 5912 treesize of output 4641 [2023-08-26 15:34:32,174 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 15:34:32,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 11803 treesize of output 9252 [2023-08-26 15:34:39,442 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,443 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,444 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,445 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,447 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,449 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,454 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,460 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,466 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,470 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 15:34:39,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 280 [2023-08-26 15:34:39,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12885426291 treesize of output 12884902003 [2023-08-26 15:34:46,813 WARN L234 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 16830 DAG size of output: 334 (called from [L 729] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-26 15:35:36,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13511348637974523 treesize of output 13510798882160635 Received shutdown request... [2023-08-26 15:41:20,374 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 15:41:20,374 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 15:41:21,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 15:41:21,802 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-26 15:41:21,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown